All categories
Developer tool directory
Search by name or feature, or pick a category. The URL keeps your filters, so a view can be shared.
| Tool | Category | Pricing | What it is |
|---|---|---|---|
| 101domain 101domain.com · EU | Registrars | Paid | Registrar known for hard-to-get ccTLDs and brand protection services, with registry lock, DNSSEC and private registration available. |
| Aceternity UI ui.aceternity.com | UI libraries | Freemium | A collection of 200+ free animated React components built with Tailwind CSS and Motion for landing pages, plus paid All-Access blocks and templates. |
| Active Record (Rails) guides.rubyonrails.org · OSS | ORMs | Open source | The ORM at the heart of Ruby on Rails: convention-over-configuration models, associations, validations, callbacks and a Ruby migration DSL that keeps schema.rb in sync. |
| ActiveCampaign activecampaign.com | Email marketing | Paid | Marketing automation platform with a deep automation builder, CRM add-ons, SMS and WhatsApp, priced by contacts on four tiers from Starter to Enterprise. |
| Actix Web actix.rs · OSS | Backend | Open source | A fast, type-safe Rust web framework with HTTP/2, WebSockets, streaming, compression, TLS and built-in middleware, and a long record in TechEmpower benchmarks. |
| Acumbamail acumbamail.com · EU | Email marketing | Freemium | Spanish email and SMS marketing platform with a free plan, prepaid email credits, landing pages, surveys and white-label accounts for agencies. |
| AdonisJS adonisjs.com · OSS | Backend | Open source | A batteries-included TypeScript MVC framework for Node.js with an ORM, authentication, validation, mail, queues, caching and testing that are designed to work together. |
| Adyen adyen.com · EU | Payments | Paid | Dutch payment platform and acquirer for large merchants, pricing each transaction as a fixed processing fee plus interchange++ and a method-specific markup. |
| AhaSend ahasend.com · EU | Transactional email | Freemium | A European transactional email API and SMTP relay with a 1,000-email free tier, a $10 plan including 25,000 emails and pay-as-you-go overage around $0.50 per 1,000. |
| Aiven aiven.io · EU | Databases | Freemium | Managed PostgreSQL, MySQL, Kafka, Valkey, OpenSearch and ClickHouse on six clouds, billed hourly per service, with always-free tiers and a $5 Developer plan. |
| Akamai Cloud (Linode) akamai.com · EU | VPS | Paid | Linode's virtual machines, now run by Akamai, with $5 shared-CPU instances, pooled transfer, $0.005/GB overage and 24/7 phone support for every customer. |
| Akamai Ion akamai.com | CDN and DNS | Paid | Akamai's enterprise CDN and web acceleration product, sold by quote with a 100% availability SLA, paired with Edge DNS and Akamai's security products. |
| Akamai Object Storage (Linode) linode.com · EU | Storage | Paid | S3-compatible object storage on Akamai Cloud (formerly Linode) for a flat $5 a month with 250 GB of storage, 1 TB of transfer and no request fees. |
| alwaysdata alwaysdata.com · EU | PaaS | Freemium | French managed cloud hosting that runs PHP, Python, Node.js, Ruby, Java and other apps with unlimited sites, databases and mailboxes per account, including a free-for-life personal plan. |
| Amazon Bedrock aws.amazon.com · EU | AI APIs | Paid | AWS service offering Claude, Amazon Nova, Llama, Mistral, DeepSeek, gpt-oss and other models on your AWS bill, with batch, flex, priority and provisioned modes. |
| Amazon CloudFront aws.amazon.com · EU | CDN and DNS | Freemium | AWS's CDN with 750+ PoPs, sold either pay-as-you-go or as flat-rate plans from $0 to $1,000 that bundle WAF, DDoS protection, Route 53 DNS and no overage charges. |
| Amazon CloudWatch aws.amazon.com · EU | Monitoring | Freemium | AWS's built-in monitoring service for metrics, logs, alarms, dashboards, X-Ray traces, synthetics and RUM, pay-per-use with a free tier and no minimum fee. |
| Amazon Cognito aws.amazon.com · EU | Auth | Freemium | AWS's managed user pools and identity service with a permanent 10,000 MAU free tier, low per-MAU prices and tight integration with other AWS services. |
| Amazon EC2 aws.amazon.com · EU | VPS | Paid | AWS's core virtual machine service: hundreds of instance types billed per second, with Spot, Savings Plans and the rest of AWS a network hop away. |
| Amazon Lightsail aws.amazon.com · EU | VPS | Paid | AWS's bundled VPS: fixed monthly plans that include vCPU, RAM, SSD, a static IP, DNS and a data transfer allowance, with a path to EC2 and other AWS services. |
| Amazon RDS and Aurora aws.amazon.com · EU | Databases | Paid | AWS's managed relational databases: RDS for six engines on instances you size, plus Aurora and Aurora Serverless for PostgreSQL and MySQL, and the serverless distributed Aurora DSQL. |
| Amazon Route 53 aws.amazon.com · EU | CDN and DNS | Paid | AWS's authoritative DNS at $0.50 per zone plus $0.40 per million queries, with latency, geo, weighted and failover routing and free queries to AWS alias targets. |
| Amazon S3 aws.amazon.com · EU | Storage | Paid | The original cloud object storage service, with eight storage classes, deep AWS integration and per-request, per-GB storage and egress billing. |
| Amazon SES aws.amazon.com · EU | Transactional email | Paid | AWS's pay-per-use email service at $0.10 per 1,000 emails, with inbound processing, dedicated IP options and new optional plans for deliverability tools. |
| Amazon SQS aws.amazon.com · EU | Jobs and queues | Freemium | AWS's fully managed message queue with standard and FIFO queues, billed per request with 1 million free requests every month and no minimum fee. |
| Analog analogjs.org · OSS | Frameworks | Open source | The Angular meta-framework: Vite builds, file-based routing, API routes, Markdown content routes and hybrid SSR/SSG, with Nitro presets for deployment. |
| Angular angular.dev · OSS | Frameworks | Open source | Google's TypeScript application framework with its own component model, router, forms, HTTP client and CLI, plus built-in hybrid rendering (SSR, prerender, CSR per route). |
| Angular Material material.angular.dev · OSS | UI libraries | Open source | The Angular team's official Material Design component library, with the Component Dev Kit (CDK) and headless @angular/aria directives, MIT-licensed and versioned with Angular. |
| Ant Design ant.design · OSS | UI libraries | Open source | An MIT-licensed React library (antd) of enterprise-style components with detailed theming and dozens of locales; v6 shipped in November 2025 and requires React 18 or newer. |
| AppSignal appsignal.com · EU | Monitoring | Freemium | Amsterdam-based APM covering errors, performance, host metrics, logs, uptime and cron check-ins, priced by request volume with unlimited users and no overage charges. |
| Appwrite Cloud appwrite.io · OSS · EU | Databases | Open source | Hosted Appwrite, an open-source backend with a database, auth, file storage, functions, messaging and site hosting, with a free plan and a $25/mo Pro plan per project. |
| Ark UI ark-ui.com · OSS | UI libraries | Freemium | Headless, accessible components for React, Solid, Vue and Svelte from the Chakra UI team, built on Zag.js state machines, with a paid Ark Plus example pack. |
| Asgardeo wso2.com | Auth | Freemium | WSO2's hosted identity service with separate B2C, B2B and workforce plans, a free tier of 7,500 consumer MAU and a pay-as-you-go plan from $20 a month. |
| ASP.NET Core dotnet.microsoft.com · OSS | Backend | Open source | Microsoft's free, cross-platform, open-source web framework for C# with minimal APIs, MVC, Blazor, SignalR, gRPC, built-in auth and yearly .NET releases with LTS. |
| Astro astro.build · OSS | Frameworks | Open source | MIT-licensed framework for content-driven sites that renders HTML on the server, ships zero JavaScript by default and hydrates only the interactive islands you mark. |
| Auth0 auth0.com · EU | Auth | Freemium | Okta's hosted customer identity platform with 30+ SDKs, separate B2C and B2B price lists, and a free tier that now includes one enterprise SSO connection and SCIM. |
| Authelia authelia.com · OSS · EU | Auth | Open source | A lightweight Apache-licensed SSO and multi-factor portal written in Go that sits beside your reverse proxy and is also an OpenID Certified OIDC provider. |
| authentik goauthentik.io · OSS · EU | Auth | Open source | A self-hosted open-source identity provider speaking OIDC, SAML, LDAP, SCIM, RADIUS and proxy auth, popular with homelabs and increasingly used by companies with an enterprise licence. |
| Authgear authgear.com · OSS | Auth | Freemium | Open-source customer identity with no feature gating: even the free cloud plan has unlimited MAU, passkeys, SAML SSO and RBAC, and a $299 one-time self-hosted licence is offered. |
| Autumn useautumn.com · OSS | Payments | Open source | Open-source (Apache 2.0) pricing and entitlements layer on top of Stripe that handles usage limits, credits and plan changes through three API calls, free up to $8K monthly billing. |
| AWS Amplify Hosting aws.amazon.com · EU | PaaS | Paid | AWS's Git-based hosting for static, single-page and server-rendered apps (Next.js, Nuxt), served through CloudFront and billed per build minute, GB served and SSR request. |
| Axiom axiom.co · EU | Monitoring | Freemium | Managed store for logs, traces and events with schema-less ingest and a query language (APL), priced by compute usage with a permanent free Personal plan. |
| Axum github.com · OSS | Backend | Open source | A Rust HTTP routing and request-handling library from the Tokio project, built on hyper and using tower middleware instead of its own middleware system. |
| Azure App Service azure.microsoft.com · EU | PaaS | Freemium | Microsoft's managed platform for web apps and APIs on Windows or Linux, with first-class .NET and Java support, plan-based pricing and enterprise networking options. |
| Azure Blob Storage azure.microsoft.com · EU | Storage | Paid | Microsoft's object storage with Hot, Cool, Cold and Archive tiers, a choice of redundancy levels and per-operation and egress billing. |
| Azure Communication Services Email learn.microsoft.com · EU | Transactional email | Paid | Microsoft Azure's pay-as-you-go email sending service at $0.25 per 1,000 emails plus data transfer, with SDKs, SMTP support and a choice of data geography. |
| Azure DNS azure.microsoft.com · EU | CDN and DNS | Paid | Azure's anycast DNS hosting for public and private zones at $0.50 per zone per month, managed with the same credentials, billing and support as other Azure services. |
| Azure Front Door azure.microsoft.com · EU | CDN and DNS | Paid | Microsoft's CDN and global HTTP load balancer, $35/mo base on Standard or $330/mo on Premium with WAF, bot protection and Private Link included. |
| Azure Virtual Machines azure.microsoft.com · EU | VPS | Paid | Microsoft's cloud VMs for Linux and Windows, billed per hour with reserved and spot discounts, strongest for Windows Server, SQL Server and Microsoft-centric companies. |
| Backblaze B2 Cloud Storage backblaze.com · EU | Storage | Freemium | S3-compatible hot storage at $6.95 per TB-month with free egress up to three times what you store, free API calls and the first 10 GB free. |
| Base UI base-ui.com · OSS | UI libraries | Open source | Unstyled, accessible React components from people behind Radix, Floating UI and Material UI, stable since December 2025 and one of shadcn/ui's two primitive layers. |
| Baseten baseten.co | AI APIs | Paid | Inference platform offering pre-optimized Model APIs for open models plus per-minute dedicated GPU deployments, with self-hosted and hybrid options. |
| beehiiv beehiiv.com | Email marketing | Freemium | Newsletter publishing platform with websites, podcasts, an ad network and paid subscriptions at 0% take rate, free up to 2,500 subscribers with unlimited sends. |
| Bento bentonow.com | Email marketing | Paid | Developer-friendly email marketing platform priced by active users, with unlimited marketing sends, automations and a usage-based transactional add-on. |
| Better Auth better-auth.com · OSS · EU | Auth | Open source | A free, open-source TypeScript auth framework that runs inside your own app and database, with a plugin for almost every feature and an optional paid dashboard and security service. |
| Better Stack betterstack.com · EU | Monitoring | Freemium | Uptime checks, status pages, on-call, logs, traces, metrics and Sentry-compatible error tracking in one product, with a generous free tier and cheaper EU data storage. |
| BinaryLane Cloud Servers binarylane.com.au | VPS | Paid | Australian cloud servers in five Australian cities plus Singapore, all NVMe, billed hourly in Australian dollars from A$4.90/mo. |
| Bits UI bits-ui.com · OSS | UI libraries | Open source | Headless, accessible Svelte components with render delegation and data-attribute styling, maintained by Hunter Johnston and used as the base of shadcn-svelte. |
| Brevo brevo.com · EU | Email marketing | Freemium | French multichannel marketing platform, formerly Sendinblue, priced by monthly email volume rather than contacts, with transactional API and SMTP on every plan. |
| Bugsink bugsink.com · EU | Monitoring | Freemium | Lightweight error tracker that accepts Sentry SDKs, runs from one Docker container on your own server for free, or hosted in the EU from $16 a month. |
| BugSnag bugsnag.com | Monitoring | Freemium | Error and performance monitoring from SmartBear with stability scores per release, strong mobile crash reporting, and an on-premises option for regulated teams. |
| BullMQ bullmq.io · OSS | Jobs and queues | Open source | MIT-licensed Redis job queue for Node.js, Bun, Python, Rust, Elixir and PHP, with delays, cron schedulers, retries, rate limits and parent-child flows. |
| Bun (Go ORM) bun.uptrace.dev · OSS | ORMs | Open source | SQL-first Go ORM from Uptrace, built on database/sql, whose query builder reads like SQL and supports PostgreSQL, MySQL/MariaDB, SQL Server, SQLite and Oracle, with migrations and fixtures. |
| Bunny CDN bunny.net · EU | CDN and DNS | Paid | Slovenian pay-as-you-go CDN from $0.01/GB in Europe and North America, with a $1 monthly minimum, free DNS for up to 500 zones and an optional WAF. |
| Bunny Storage bunny.net · EU | Storage | Paid | Pay-as-you-go storage from the CDN company bunny.net, replicated to up to 15 regions, with free API egress and a $1 monthly minimum. |
| Buttondown buttondown.com | Email marketing | Freemium | Independent, profitable newsletter service with a Markdown editor, a well-regarded API and a la carte add-ons, free for the first 100 subscribers. |
| BuyVM KVM Slices buyvm.net | VPS | Paid | Long-running budget host selling KVM 'slices' with unmetered bandwidth, 3.5 GHz+ Intel cores, cheap block storage and free DirectAdmin, from $2/mo. |
| CacheFly cachefly.com | CDN and DNS | Freemium | Long-running CDN (23+ years) for media, podcasts, games and downloads, with a free 100 GB developer tier and committed plans from $300/mo for 10 TB. |
| CapRover caprover.com · OSS · EU | PaaS | Open source | Free, self-hosted PaaS that wraps Docker Swarm, nginx and Let's Encrypt in a web dashboard and CLI, with one-click apps and multi-node scaling. |
| Casdoor casdoor.org · OSS · EU | Auth | Open source | An open-source Go identity server with a web UI that speaks OAuth 2.0, OIDC, SAML, CAS, LDAP and SCIM, supports 100+ identity providers, and adds an MCP server and agent auth. |
| CDN77 cdn77.com · EU | CDN and DNS | Paid | European CDN built for video and large traffic volumes, with 200 PoPs, a $990/mo Growth plan for 250 TB and hands-on engineering support. |
| Celery docs.celeryq.dev · OSS | Jobs and queues | Open source | Python's long-established distributed task queue, running tasks on worker processes through RabbitMQ, Redis or SQS brokers, with periodic tasks, rate limits and task chaining. |
| Cerebras Inference cerebras.ai | AI APIs | Paid | Inference API on Cerebras wafer-scale chips for a short list of open-weight models, prepaid by credit with no permanent free tier. |
| Chakra UI chakra-ui.com · OSS | UI libraries | Freemium | A styled, themeable React component library with a style-props system, CLI snippets and paid Chakra UI Pro blocks; it currently uses Emotion at runtime. |
| Chargebee chargebee.com | Payments | Paid | Gateway-independent subscription and usage billing for SaaS, priced at 0.80% of monthly billing value with no platform fee, and connecting to 40+ payment gateways. |
| Checkly checklyhq.com · EU | Monitoring | Freemium | Monitoring-as-code for uptime, API and Playwright browser checks, defined in TypeScript or Terraform and run from 22 locations, with status pages and AI root-cause analysis. |
| Checkout.com checkout.com · EU | Payments | Paid | London-based enterprise payment processor with quote-only flat-rate or interchange++ pricing, local acquiring in 45+ countries and a single unified payments API. |
| Cherry Servers Cloud VPS cherryservers.com · EU | VPS | Paid | Lithuanian bare-metal and cloud provider's VPS line, from $3.51/mo, with hourly billing, an API, crypto payments and data centers in Europe, the US and Asia. |
| Claude API anthropic.com | AI APIs | Paid | Anthropic's pay-per-token API for the Claude Fable, Opus, Sonnet and Haiku models, with batch and prompt-caching discounts and hard monthly spend caps per tier. |
| Clerk clerk.com | Auth | Freemium | Hosted authentication and user management with drop-in React-style components, B2B organizations and billing, priced on monthly retained users rather than sign-ups. |
| Clever Cloud clever.cloud · EU | PaaS | Paid | French PaaS running on its own data centers in France, with git-push deploys for a dozen runtimes, managed databases, per-second billing and ISO 27001 and HDS certification. |
| Cloudflare cloudflare.com · EU | CDN and DNS | Freemium | Reverse-proxy CDN with free DNS, unmetered DDoS protection and a WAF on a 330-city network, billed per plan rather than per gigabyte. |
| Cloudflare D1 cloudflare.com · EU | Databases | Freemium | Serverless SQLite database built into Cloudflare Workers, billed per row read and written with no compute hours, 30-day point-in-time restore and free global read replicas. |
| Cloudflare Email Service developers.cloudflare.com | Transactional email | Paid | Cloudflare's email sending (beta) and routing service: send from Workers bindings, REST or SMTP, with 3,000 emails included on Workers Paid and $0.35 per 1,000 after. |
| Cloudflare Queues developers.cloudflare.com | Jobs and queues | Freemium | Managed message queue built into Cloudflare Workers, billed per 64 KB operation with no egress charges, and free for 10,000 operations a day since February 2026. |
| Cloudflare R2 cloudflare.com · EU | Storage | Freemium | S3-compatible object storage from Cloudflare that charges nothing for egress, with a 10 GB free tier and native bindings for Workers. |
| Cloudflare Registrar cloudflare.com | Registrars | Paid | Registrar that charges only the registry and ICANN fee, with no markup at registration or renewal, but requires Cloudflare's own nameservers. |
| Cloudflare Workers (incl. Pages) workers.cloudflare.com · EU | PaaS | Freemium | Serverless functions and full-stack apps running in V8 isolates in 330+ cities, with free unlimited static asset requests and no egress charges; Pages Functions bill the same way. |
| Cloudflare Workers AI developers.cloudflare.com | AI APIs | Freemium | Serverless inference for open-weight models on Cloudflare's network, with 10,000 free Neurons a day and per-Neuron billing on the Workers Paid plan. |
| Cloudflare Workflows developers.cloudflare.com | Jobs and queues | Freemium | Durable multi-step workflows that run on Cloudflare Workers, with retried steps, sleeps up to a year and event waits, billed per step, CPU time and stored state. |
| Cloudinary cloudinary.com | Storage | Freemium | Image and video management platform with storage, URL-based transformations and CDN delivery, billed in credits shared across storage, bandwidth and transformations. |
| ClouDNS cloudns.net · EU | CDN and DNS | Freemium | Managed DNS provider since 2010 with a free one-zone plan and anycast Premium plans from $2.95/mo that include failover checks, DNSSEC and secondary DNS. |
| CockroachDB Cloud (Cockroach Continuum) cockroachlabs.com · EU | Databases | Paid | Managed CockroachDB, a PostgreSQL-compatible distributed SQL database that survives zone and region failures, now sold to new customers as Cockroach Continuum, billed per vCPU-hour. |
| Cohere API cohere.com | AI APIs | Freemium | Enterprise-focused API for Cohere's Command, Embed and Rerank models, with a free but non-commercial trial key and dedicated Model Vault instances. |
| Contabo Cloud VPS contabo.com · EU | VPS | Paid | German budget host selling large VPS plans, 4 vCPU and 8 GB RAM from about $5 a month, with unlimited traffic and DDoS protection. |
| Convex convex.dev · OSS · EU | Databases | Freemium | TypeScript backend platform whose reactive document database pushes query results to clients automatically, with server functions, file storage, search, scheduling and auth in one service. |
| Coolify coolify.io · OSS · EU | PaaS | Open source | Open-source (Apache 2.0), self-hostable PaaS with a web dashboard that deploys apps, databases and 280+ one-click services to any server you can reach over SSH. |
| Coroot coroot.com · OSS · EU | Monitoring | Open source | Self-hosted observability that uses eBPF to collect metrics, logs, traces and profiles with no code changes, then points to root causes; open-source edition free, commercial $1 per CPU core. |
| Creem creem.io | Payments | Paid | Merchant of record for software and AI products with one flat 3.9% + 40¢ rate, no international card surcharge, built-in affiliates and revenue splits. |
| Cronitor cronitor.io | Monitoring | Freemium | Monitoring for cron jobs, background workers, websites, APIs and heartbeats, with status pages and RUM, priced per monitor and per user. |
| Crunchy Bridge crunchydata.com · EU | Databases | Paid | Managed PostgreSQL from Crunchy Data, now owned by Snowflake, on AWS, Azure or GCP, with flat per-plan prices, included backups and egress, and Postgres-specialist support. |
| Customer.io customer.io | Email marketing | Paid | Event-driven messaging platform for product teams, sending email, push, in-app and SMS from behavioural data, billed by profiles with a million emails included on the entry plan. |
| daisyUI daisyui.com · OSS | UI libraries | Freemium | A Tailwind CSS plugin that adds semantic component class names such as btn, card and modal, with many themes, working in any framework or plain HTML. |
| Dapper github.com · OSS | ORMs | Open source | Micro-ORM for .NET, created at Stack Overflow, that adds Query and Execute extension methods to ADO.NET connections to run your SQL and map results to objects with very little overhead. |
| Dash0 dash0.com | Monitoring | Paid | OpenTelemetry-native observability for traces, logs, metrics, RUM and synthetics, priced per million signals with separate ingest and storage rates and an AI agent for root-cause analysis. |
| Datadog datadoghq.com · EU | Monitoring | Freemium | Broad SaaS observability platform priced per host and per data volume, covering infrastructure, APM, logs, synthetics, RUM and security in one account. |
| DBOS dbos.dev · OSS | Jobs and queues | Open source | MIT-licensed library that adds durable workflows, queues and scheduled jobs to your app by checkpointing steps in Postgres, with no separate orchestrator to run. |
| DeepInfra deepinfra.com | AI APIs | Paid | Low-price pay-as-you-go inference API for 100+ open-weight models, with a zero-retention policy, spending limits and GPU rental. |
| DeepSeek API api-docs.deepseek.com | AI APIs | Paid | DeepSeek's prepaid API for its V4.1 Flash and V4 Pro models, with very cheap cache hits and off-peak prices at half the peak rate. |
| Deno Deploy deno.com | PaaS | Freemium | Serverless hosting for JavaScript and TypeScript apps from the creators of Deno, running in V8 isolates with Node and npm compatibility, PR previews with database clones, and OpenTelemetry built in. |
| Descope descope.com · EU | Auth | Freemium | Customer and AI-agent identity built around drag-and-drop login flows, with a free plan of 7,500 MAU and three SSO connections. |
| deSEC desec.io · OSS · EU | CDN and DNS | Free | Free, open-source DNS hosting run by a Berlin non-profit, with DNSSEC signing always on, a REST API, Terraform provider and global anycast. |
| Diesel diesel.rs · OSS | ORMs | Open source | Rust ORM and query builder that checks queries against your schema at compile time, with a CLI for migrations and schema generation; supports PostgreSQL, MySQL, MariaDB and SQLite. |
| DigiCert DNS (DNS Made Easy) dnsmadeeasy.com | CDN and DNS | Paid | The former DNS Made Easy, now sold by DigiCert: anycast managed DNS with a 100% uptime SLA and geo traffic routing, from $300 a year, plus enterprise UltraDNS. |
| DigitalOcean App Platform digitalocean.com · EU | PaaS | Freemium | DigitalOcean's managed app platform: flat monthly container prices with bandwidth included, free static sites, and DigitalOcean's managed databases and Droplets on the same bill. |
| DigitalOcean Droplets digitalocean.com · EU | VPS | Paid | Developer-friendly virtual machines from $4/mo with per-second billing, pooled bandwidth and managed databases, load balancers and Kubernetes on the same account. |
| DigitalOcean Managed Databases digitalocean.com · EU | Databases | Paid | Managed PostgreSQL, MySQL, MongoDB, Valkey, Kafka and OpenSearch clusters on DigitalOcean, with flat monthly prices from about $15 and daily backups with 7-day restore. |
| DigitalOcean Spaces digitalocean.com · EU | Storage | Paid | S3-compatible object storage for $5 a month including 250 GiB of storage, 1 TiB of transfer and a built-in CDN, from the developer-focused cloud. |
| Django djangoproject.com · OSS | Backend | Open source | The batteries-included Python web framework with an ORM, migrations, admin interface, auth, forms and security protections, run by an international volunteer team since 2005. |
| DNSimple dnsimple.com | CDN and DNS | Paid | Developer-focused DNS host and registrar with no base fee on Solo, $0.50 per zone per month, a full API, CLI, Terraform provider and ALIAS records. |
| Doctrine ORM doctrine-project.org · OSS | ORMs | Open source | PHP's main data mapper ORM, built on the Doctrine DBAL, with a unit of work, DQL query language inspired by Hibernate, and the default persistence layer in Symfony. |
| Docusaurus docusaurus.io · OSS | Frameworks | Open source | Meta's React and MDX static site generator for documentation, with versioned docs, i18n, blog, search integration and theme swizzling out of the box. |
| Dodo Payments dodopayments.com | Payments | Paid | Merchant of record for SaaS and AI products that onboards sellers from 177 countries, with credit and usage billing, license keys and a 4% + 40¢ base rate. |
| Dokku dokku.com · OSS · EU | PaaS | Open source | MIT-licensed 'mini-Heroku' that turns one Linux server into a git-push PaaS using Heroku buildpacks and Docker, driven from the command line. |
| Dokploy dokploy.com · OSS · EU | PaaS | Open source | Open-source, self-hostable PaaS built on Docker, Docker Compose and Swarm, with database backups, multi-server deploys and Traefik routing; a hosted control plane costs $4.50 per server. |
| Dragonfly Cloud dragonflydb.io · EU | Databases | Paid | Managed Dragonfly, a multi-threaded in-memory store compatible with Redis, Valkey and Memcached, billed per provisioned GB on AWS, Google Cloud or Azure. |
| Drizzle ORM orm.drizzle.team · OSS | ORMs | Open source | Lightweight TypeScript ORM with SQL-shaped query builders, schemas declared in TypeScript, zero dependencies and a CLI (Drizzle Kit) for migrations and a free data browser. |
| Dynadot dynadot.com | Registrars | Paid | Registrar with a flat $10.88 .com, a large TLD catalogue, a built-in auction marketplace and no checkout upselling. |
| easyDNS easydns.com | CDN and DNS | Paid | Canadian managed DNS provider and registrar with anycast plans from $20 a year, including DNSSEC, GeoDNS, failover, dynamic DNS and bundled mailboxes. |
| Echo echo.labstack.com · OSS | Backend | Open source | A minimalist, extensible Go web framework with an optimised router, middleware at root, group or route level, data binding, automatic TLS and HTTP/2. |
| Ecto hexdocs.pm · OSS | ORMs | Open source | Elixir's standard database toolkit: repositories, schemas, composable queries and changesets for validation, with ecto_sql adding migrations and adapters for PostgreSQL, MySQL, SQL Server and SQLite. |
| Elastic Email API elasticemail.com | Transactional email | Freemium | A low-cost email API and SMTP relay with a 3,000-email free plan and $19 for 50,000 emails, sold alongside Elastic Email's marketing and chat tools. |
| Eleventy (Build Awesome) 11ty.dev · OSS | Frameworks | Open source | Simple, fast JavaScript static site generator that injects no markup of its own and supports a dozen template languages; renamed Build Awesome in March 2026 under Font Awesome. |
| Eloquent ORM laravel.com · OSS | ORMs | Open source | Laravel's built-in Active Record ORM: one model class per table, expressive relationships, scopes, events and soft deletes, with Laravel's schema migrations and five first-party databases. |
| Elysia elysiajs.com · OSS | Backend | Open source | A TypeScript web framework optimised for Bun with end-to-end type inference, schema validation, OpenAPI generation and adapters for Node.js and other runtimes. |
| Emailit emailit.com · EU | Transactional email | Paid | An email API and SMTP service billed with prepaid credits that never expire, from $0.20 down to $0.10 per 1,000 emails, run from its own data center in Prague. |
| EmailOctopus emailoctopus.com | Email marketing | Freemium | Low-cost, email-only marketing tool with a free plan for 2,500 subscribers and 10,000 emails, plus an Amazon SES edition that routes mail through your own account. |
| Encharge encharge.io | Email marketing | Paid | Behaviour-based marketing automation for SaaS, with a drag-and-drop flow builder, event segmentation and Stripe, HubSpot and Segment integrations, priced by subscribers. |
| Encore encore.dev · OSS | Backend | Open source | An open-source TypeScript and Go backend framework where databases, Pub/Sub, buckets and cron jobs are declared in code, with an optional paid cloud that provisions them on AWS or GCP. |
| Ent entgo.io · OSS | ORMs | Open source | Go entity framework that generates a fully typed query API from schemas written as Go code, with graph-style traversal of relations and Atlas-powered versioned migrations. |
| Entity Framework Core learn.microsoft.com · OSS | ORMs | Open source | Microsoft's open-source ORM for .NET: LINQ queries, change tracking, migrations and providers for SQL Server, PostgreSQL, SQLite, MySQL, Oracle, Cosmos DB and more, released yearly alongside .NET. |
| EuroDNS eurodns.com · EU | Registrars | Paid | Luxembourg registrar aimed at European businesses, with DNSSEC support and wide TLD coverage, but a €21 .com renewal and paid privacy. |
| Exoscale Compute exoscale.com · EU | VPS | Paid | Swiss cloud with compute instances in Switzerland, Austria, Germany and Bulgaria, billed per second at the same flat rate in every zone. |
| Express expressjs.com · OSS | Backend | Open source | The long-standing minimal web framework for Node.js: routing, middleware and HTTP helpers, with the largest ecosystem of third-party middleware in JavaScript. |
| Faktory contribsys.com · OSS | Jobs and queues | Open source | Standalone job server from the author of Sidekiq that any language can push jobs to and fetch jobs from, with retries and a web UI; AGPL with a paid Enterprise edition. |
| FastAPI fastapi.tiangolo.com · OSS | Backend | Open source | A Python API framework built on Starlette and Pydantic that turns standard type hints into validation, serialization and automatic OpenAPI docs, with an optional paid FastAPI Cloud. |
| Fastify fastify.dev · OSS | Backend | Open source | A fast, low-overhead Node.js framework with JSON Schema validation and serialization, a plugin system with encapsulation, and the Pino logger built in. |
| Fastly fastly.com | CDN and DNS | Freemium | Usage-billed programmable CDN known for instant purge, real-time logs and Wasm edge compute, with a free monthly allowance of 100 GB and 1M requests. |
| FastSpring fastspring.com | Payments | Paid | Long-running merchant of record for software, SaaS, games and digital products, with all-in revenue-share pricing agreed with sales rather than a public rate. |
| Fiber gofiber.io · OSS | Backend | Open source | An Express-inspired Go web framework on Fasthttp with zero-allocation design, plus built-in middleware, template engines, storage drivers and WebSocket support. |
| Firebase firebase.google.com · EU | Databases | Freemium | Google's app backend platform: Cloud Firestore and Realtime Database for synced NoSQL data, Firebase Authentication, hosting, functions and storage, with a no-card free plan. |
| Fireworks AI fireworks.ai | AI APIs | Paid | Postpaid inference platform for open-weight models with Standard, Priority and Fast serving tiers, half-price batch jobs and monthly spend tiers. |
| Flask flask.palletsprojects.com · OSS | Backend | Open source | A lightweight Python WSGI micro-framework built on Werkzeug and Jinja that stays out of your way, with community extensions for databases, auth and forms. |
| Flowbite flowbite.com · OSS | UI libraries | Freemium | Open-source Tailwind CSS components with a small vanilla JavaScript layer for interactivity, plus Flowbite Pro: 450+ sections, app pages and Figma files for a one-time fee. |
| Fly.io fly.io · EU | PaaS | Paid | Runs Docker images as fast-booting Firecracker VMs (Machines) in 18+ regions, billed per second with no plans, plus managed Postgres and agent-oriented Sprites. |
| Fresh usefresh.dev · OSS | Frameworks | Open source | Deno's web-standards framework: server-rendered pages with Preact islands for interactivity, a small middleware-style API, built-in OpenTelemetry and, since Fresh 2, a Vite plugin. |
| Frontegg frontegg.com | Auth | Freemium | Low-code customer identity for B2B SaaS, with a pay-as-you-go plan that starts free for 7,500 MAU and includes five SSO or SCIM enterprise connections. |
| FusionAuth fusionauth.io · EU | Auth | Freemium | A downloadable customer identity server whose Community edition is free to self-host with unlimited users, plus paid licences and hosting for premium features and support. |
| Gandi gandi.net · EU | Registrars | Paid | French registrar with 750+ extensions, LiveDNS anycast DNS with automatic DNSSEC and a full API, but a .com renewal near $38. |
| Garage garagehq.deuxfleurs.fr · OSS | Storage | Open source | Lightweight open-source S3-compatible object store designed to run on modest, mixed hardware spread across several sites, from the Deuxfleurs team. |
| Gatsby gatsbyjs.com · OSS | Frameworks | Open source | Once-leading React static site generator with a GraphQL data layer, owned by Netlify since 2023 and now kept in limited maintenance: security fixes and compatibility updates, no new direction. |
| Gcore CDN gcore.com · EU | CDN and DNS | Freemium | Luxembourg-based CDN on 210+ PoPs with a pay-as-you-go plan: first 1 TB free each month, then €0.01/GB, plus managed DNS and a separate WAF. |
| Gemini API ai.google.dev | AI APIs | Freemium | Google's developer API for Gemini models, with a free tier on most Flash models (prompts used to improve Google's products) and paid tiers with spend caps. |
| GetResponse getresponse.com | Email marketing | Freemium | All-in-one email marketing platform with unlimited sends on every paid plan, landing pages, webinars and course tools, priced by list size from $19 a month. |
| Ghost ghost.org · OSS · EU | Email marketing | Open source | Open-source blog and newsletter platform with memberships and paid subscriptions and no payment fees; self-host for free or use the Ghost(Pro) managed service. |
| Gin gin-gonic.com · OSS | Backend | Open source | A widely used Go HTTP framework with a Martini-like API on a zero-allocation router, plus JSON binding, validation, route groups and recovery middleware. |
| GitHub Pages pages.github.com | PaaS | Free | Free static site hosting straight from a GitHub repository, with custom domains, Jekyll or GitHub Actions builds, and a soft 100 GB monthly bandwidth limit; not allowed for commercial sites. |
| GlitchTip glitchtip.com · OSS · EU | Monitoring | Open source | Open-source, Sentry-SDK-compatible error tracking with simple performance, uptime and log features, self-hostable or hosted from $15 a month in the US or Germany. |
| GoDaddy Domains godaddy.com | Registrars | Paid | The largest registrar, with deep first-year discounts, 24/7 phone support and bundled business tools, but a $22.99 .com renewal. |
| Google Cloud CDN cloud.google.com · EU | CDN and DNS | Paid | Google's CDN for content behind Cloud Load Balancing, billed per GiB from $0.08 in North America and Europe, with Cloud Armor for WAF and DDoS protection. |
| Google Cloud DNS cloud.google.com · EU | CDN and DNS | Paid | Google Cloud's managed DNS at about $0.20 per zone and $0.40 per million queries, with public, private and forwarding zones plus health-checked routing policies. |
| Google Cloud Run cloud.google.com · EU | PaaS | Freemium | Google's serverless container platform: deploy any container or source code, scale to zero, and pay per 100 ms of CPU and memory, with a monthly free tier. |
| Google Cloud SQL cloud.google.com · EU | Databases | Paid | Google Cloud's managed PostgreSQL, MySQL and SQL Server, priced per vCPU and GiB of memory by the hour, with Enterprise and Enterprise Plus editions and 40+ regions. |
| Google Cloud Storage cloud.google.com · EU | Storage | Freemium | Google Cloud's object storage with four storage classes, regional, dual-region and multi-region buckets, and a small always-free allowance in three US regions. |
| Google Cloud Tasks cloud.google.com · EU | Jobs and queues | Freemium | Google Cloud's managed task queue that pushes each task to an HTTP endpoint or App Engine with retries, rate limits and scheduling, with 1 million free operations a month. |
| Google Compute Engine cloud.google.com · EU | VPS | Freemium | Google Cloud's virtual machines, billed per second after the first minute, with an always-free e2-micro in three US regions and custom machine shapes. |
| GORM gorm.io · OSS | ORMs | Open source | The most widely used Go ORM: struct-based models, associations, hooks, preloading, transactions and AutoMigrate, with official drivers for MySQL, PostgreSQL, SQLite, SQL Server, TiDB and Oracle. |
| Grafana Cloud grafana.com · OSS · EU | Monitoring | Freemium | Hosted Grafana with managed Prometheus-style metrics, Loki logs, Tempo traces and profiles, built on open-source projects, with a permanent free tier and usage pricing. |
| Graphile Worker worker.graphile.org · OSS | Jobs and queues | Open source | MIT-licensed Node.js job queue that uses only PostgreSQL, starting jobs in milliseconds via LISTEN/NOTIFY, with retries, cron and scheduled jobs. |
| GroqCloud groq.com | AI APIs | Freemium | Inference API on Groq's own LPU hardware for open-weight models such as gpt-oss and Qwen, with a free plan and published output speeds. |
| Gumroad gumroad.com | Payments | Paid | Storefront and checkout for creators selling digital products and memberships, a merchant of record since January 2025, charging 10% + 50¢ on direct sales. |
| Hangfire hangfire.io · OSS | Jobs and queues | Open source | Background job framework for .NET that runs fire-and-forget, delayed, recurring (cron) and continuation jobs inside your app, stored in SQL Server or Redis, with a built-in dashboard. |
| Hanko hanko.io · OSS · EU | Auth | Open source | German, open-source authentication with passkeys as a first-class method, EU hosting, 10,000 free MAU on Hanko Cloud and a $29 Pro plan. |
| Hatchet hatchet.run · OSS · EU | Jobs and queues | Open source | MIT-licensed task queue and durable workflow engine built on Postgres, with a cloud offering 1 million free runs a month and per-run pricing after that. |
| Headless UI headlessui.com · OSS | UI libraries | Open source | Tailwind Labs' small set of unstyled, accessible components (Menu, Listbox, Combobox, Dialog, Popover, Tabs and more) for React and Vue, designed to pair with Tailwind CSS. |
| Healthchecks.io healthchecks.io · OSS · EU | Monitoring | Freemium | Simple, open-source cron job monitoring: jobs ping a unique URL and you are alerted when a ping is late, with 20 free checks and flat paid plans. |
| Heroku heroku.com · EU | PaaS | Paid | The original git-push PaaS, now owned by Salesforce and in a 'sustaining engineering' phase since February 2026: stable dynos, Heroku Postgres and 150+ add-ons, few new features. |
| HeroUI heroui.com · OSS | UI libraries | Freemium | HeroUI, renamed from NextUI in January 2025, is a free React library on Tailwind CSS v4 and React Aria Components, with a React Native sibling and paid HeroUI Pro. |
| Hetzner Cloud hetzner.com · EU | VPS | Paid | German cloud servers with hourly billing capped at a monthly price, 20 TB of traffic in the EU and data centers in Germany, Finland, the US and Singapore. |
| Hetzner DNS hetzner.com · EU | CDN and DNS | Free | Free DNS hosting from German host Hetzner, now part of Hetzner Console and the Cloud API, with Terraform, cert-manager and external-dns integrations. |
| Hetzner Object Storage hetzner.com · EU | Storage | Paid | German S3-compatible object storage with a flat monthly base that includes 1 TB of storage and 1 TB of egress, free API calls and EU-only locations. |
| Hexclave (formerly Stack Auth) stack-auth.com · OSS · EU | Auth | Open source | Open-source auth and user management for SaaS, formerly Stack Auth, with teams, RBAC, payments and analytics; free to 10,000 users hosted, or self-hosted. |
| Hibernate ORM hibernate.org · OSS | ORMs | Open source | Java's most established ORM and the reference-style Jakarta Persistence (JPA) implementation, with HQL, two-level caching and support for more than a dozen databases; Apache 2.0 licensed since version 7. |
| Honeybadger honeybadger.io | Monitoring | Freemium | Bootstrapped all-in-one monitor for web apps: error tracking, logs and light APM, uptime and cron checks, and status pages, with a free solo plan and flat team pricing. |
| Honeycomb honeycomb.io · EU | Monitoring | Freemium | OpenTelemetry-native observability built on high-cardinality events and distributed tracing, priced by event volume with unlimited users and a free 20M-event plan. |
| Hono hono.dev · OSS | Backend | Open source | A small, zero-dependency TypeScript web framework built on Web Standards that runs the same code on Cloudflare Workers, Deno, Bun, Node.js and AWS Lambda. |
| Hostinger Domains hostinger.com · EU | Registrars | Paid | Registrar arm of the web host Hostinger, with a near-free first year on .com, free privacy and 500+ extensions, but a $19.99 renewal. |
| Hostinger VPS hostinger.com · EU | VPS | Paid | KVM VPS plans from a large web host, with AMD EPYC, NVMe, weekly backups and one-click apps, priced low on long prepaid terms. |
| Hover hover.com | Registrars | Paid | Canadian registrar focused only on domains and email, with free WHOIS privacy, no hosting upsells and flat but mid-range .com pricing. |
| Hugging Face Inference Providers huggingface.co | AI APIs | Freemium | One Hugging Face token routes requests to 200+ models on partner inference providers at the providers' own prices, with small monthly free credits. |
| Hugo gohugo.io · OSS | Frameworks | Open source | Static site generator written in Go and distributed as a single binary, known for rendering large sites in seconds, with multilingual support, taxonomies, asset pipelines and Hugo Modules. |
| Hurricane Electric Free DNS dns.he.net | CDN and DNS | Free | Free forward and reverse DNS hosting from backbone network operator Hurricane Electric, with IPv6, ALIAS and CAA records, dynamic DNS and slave zones. |
| Hyperping hyperping.com | Monitoring | Freemium | Uptime monitoring from 18 regions with status pages, server agents, browser checks and on-call escalation in one product, with a free plan of 20 monitors. |
| IBM NS1 Connect ibm.com | CDN and DNS | Paid | IBM's managed authoritative DNS with filter-chain traffic steering, health checks and multi-CDN routing, from $99/mo with a 100% SLA. |
| IDrive e2 idrive.com · EU | Storage | Paid | Budget S3-compatible hot storage from the IDrive backup company, with free API calls, free egress up to 3x storage and discounted yearly plans. |
| ImageKit imagekit.io | Storage | Freemium | Real-time image and video optimisation CDN with an integrated media library, a forever-free plan and paid plans billed on bandwidth and storage. |
| Imperva Cloud WAF imperva.com | CDN and DNS | Paid | Thales's enterprise cloud WAF with managed day-zero rules, L3-L7 DDoS protection, bot defence and a built-in CDN, sold by quote or through cloud marketplaces. |
| Infomaniak Domains infomaniak.com | Registrars | Paid | Swiss independent registrar with DNSSEC, DynDNS and a free email address included with every domain, billed in Swiss francs. |
| Infomaniak VPS infomaniak.com | VPS | Paid | Swiss VPS hosted in Infomaniak's own data centers, from CHF 2.70/mo for VPS Lite, with a VPS Cloud line offering a 99.99% SLA and unlimited traffic. |
| Inngest inngest.com | Jobs and queues | Freemium | Event-driven durable functions platform: wrap code in steps and Inngest handles queues, retries, scheduling and flow control, calling your app over HTTPS. |
| INWX inwx.com · EU | Registrars | Paid | German registrar with over 2,200 extensions, trustee services for restricted ccTLDs, anycast DNS with automated DNSSEC, and a Terraform provider. |
| IONOS Domains ionos.com · EU | Registrars | Paid | German hosting company's registrar with a $1 first-year .com for new customers and a free wildcard SSL, but a $20 renewal and paid DNSSEC. |
| IONOS VPS ionos.com · EU | VPS | Paid | German host's VPS+ plans with unlimited traffic, NVMe storage and 24/7 support, starting at 4 vCores and 4 GB RAM for a low introductory price. |
| jOOQ jooq.org · OSS | ORMs | Freemium | SQL-first Java library that generates classes from your database schema and lets you write type-safe SQL in Java, Kotlin or Scala; free for open-source databases, paid editions for commercial ones. |
| jsDelivr jsdelivr.com · OSS | CDN and DNS | Free | Free public CDN for files from npm and GitHub, running since 2012 on a multi-CDN setup (Cloudflare, Fastly, Bunny, Gcore) with 540+ points of presence. |
| Kamatera Cloud Servers kamatera.com · EU | VPS | Paid | Configurable cloud servers where you pick CPU type, RAM, disk and location separately, from $4/mo with 5 TB traffic and a 30-day free trial. |
| Kanidm kanidm.com · OSS · EU | Auth | Open source | A Rust identity management server that combines an OIDC provider, passkeys, Linux/UNIX login, SSH key distribution, RADIUS and a read-only LDAPS gateway in one self-hosted package. |
| Keila keila.io · OSS · EU | Email marketing | Open source | Open-source newsletter tool made in Germany and hosted in the EU, with Markdown, block and MJML editors and cloud plans priced by emails with unlimited contacts. |
| KeyCDN keycdn.com · EU | CDN and DNS | Paid | Swiss pay-as-you-go CDN from $0.04/GB in North America and Europe, with no request fees, a $4 monthly minimum and every feature available on every account. |
| Keycloak keycloak.org · OSS · EU | Auth | Open source | The long-established Apache-licensed identity and access management server: OIDC, OAuth 2.0 and SAML, LDAP/AD federation, identity brokering and fine-grained authorization, self-hosted. |
| Kimi API (Moonshot AI Open Platform) platform.kimi.ai | AI APIs | Paid | Moonshot AI's international API for its Kimi K3 and K2 models, prepaid from a $1 minimum with rate limits that rise with cumulative recharges. |
| Kinde kinde.com · EU | Auth | Freemium | Hosted auth bundled with subscription billing and feature flags, free to 10,500 MAU, with users on paid subscriptions billed through Kinde not counted. |
| Kit kit.com | Email marketing | Freemium | Creator-focused email platform, formerly ConvertKit, with a free plan up to 10,000 subscribers and paid plans that add visual automations and sequences. |
| Klaviyo klaviyo.com | Email marketing | Freemium | Ecommerce-focused email, SMS and customer platform with deep store integrations and behaviour-based flows, billed by active profiles, free up to 250 profiles. |
| Knex.js knexjs.org · OSS | ORMs | Open source | Veteran multi-dialect SQL query builder for Node.js with transactions, connection pooling, streaming and a built-in migration and seed runner; active again with releases through 2026. |
| Koyeb koyeb.com · EU | PaaS | Paid | Serverless platform for containers, APIs and GPU inference on bare metal in 50+ locations, with scale-to-zero and per-second billing; joining Mistral AI and closed to free signups since 2026. |
| Ktor ktor.io · OSS | Backend | Open source | JetBrains' lightweight Kotlin framework for asynchronous servers and HTTP clients, built on coroutines, with a plugin pipeline and no imposed structure. |
| Kysely kysely.dev · OSS | ORMs | Open source | Type-safe TypeScript SQL query builder that infers result types from your database schema, compiles one-to-one to SQL and runs in Node, Deno, Bun, Workers and browsers. |
| Lago getlago.com · OSS | Payments | Open source | Open-source (AGPLv3) metering and usage-based billing engine you can self-host for free or buy as Lago Cloud, used for token, API and hybrid pricing. |
| Laravel laravel.com · OSS | Backend | Open source | A batteries-included PHP framework with an ORM, queues, auth, real-time and AI packages, backed by a company that sells Laravel Cloud, Forge, Nightwatch and other paid tools. |
| Laravel Horizon laravel.com · OSS | Jobs and queues | Open source | Free MIT package from the Laravel team that manages Redis queue workers from one config file and adds a dashboard for throughput, runtimes, failures and tags. |
| Leapcell leapcell.io | PaaS | Freemium | Serverless app platform that hosts up to 20 projects free and charges only for requests, never idle time, with optional fixed-price persistent servers, Postgres and Redis-compatible storage. |
| Lemon Squeezy lemonsqueezy.com | Payments | Paid | Merchant of record for digital products and SaaS, owned by Stripe since 2024, still selling at 5% + 50¢ while its team builds Stripe Managed Payments as the successor. |
| Leptos leptos.dev · OSS | Frameworks | Open source | Rust framework for full-stack web apps with fine-grained reactive signals, server-side rendering, WebAssembly hydration and #[server] functions that cross the client-server boundary. |
| Lettermint lettermint.co · EU | Transactional email | Freemium | A Dutch, founder-owned email API running on its own EU infrastructure and IP ranges, with ISO 27001 certification and plans from €10 for 10,000 emails. |
| listmonk listmonk.app · OSS · EU | Email marketing | Open source | Free, open-source (AGPLv3) self-hosted newsletter and mailing list manager shipped as a single Go binary with Postgres, known for low resource use at high volume. |
| Litestar litestar.dev · OSS | Backend | Open source | A community-run Python ASGI framework for APIs with dependency injection, DTOs, layered configuration, first-class SQLAlchemy support and automatic OpenAPI docs. |
| Loco loco.rs · OSS | Backend | Open source | A Rails-inspired, batteries-included Rust framework built on Axum and SeaORM, with generators, background jobs, mailers, auth, storage and a scheduler for solo developers. |
| Logto logto.io · OSS · EU | Auth | Open source | Open-source OIDC and OAuth 2.1 auth with organizations, enterprise SSO and RBAC, free to 50,000 MAU on Logto Cloud and billed by access tokens after that. |
| Loops loops.so | Email marketing | Freemium | Email platform for software companies that combines lifecycle workflows, campaigns and transactional sending, priced only by subscribed contacts with unlimited sends on paid plans. |
| LuaDNS luadns.com | CDN and DNS | Freemium | Small, developer-oriented DNS host with anycast on 22 PoPs, DNSSEC, unlimited queries and Git-based zone management with Lua scripting, from free to $29 a year. |
| Magic UI magicui.design · OSS | UI libraries | Freemium | Free, MIT-licensed animated React components for landing pages (text effects, backgrounds, device mocks), copied in shadcn-style, with paid Magic UI Pro templates. |
| Mailchimp mailchimp.com | Email marketing | Freemium | The best-known email marketing suite, now owned by Intuit, with contact-based plans, a small free tier and multi-step automation flows from the Standard plan up. |
| Mailchimp Transactional mailchimp.com | Transactional email | Paid | Mailchimp's transactional email API (formerly Mandrill), sold as blocks of 25,000 emails at $20 each on top of a paid Mailchimp Standard or Premium plan. |
| Mailcoach mailcoach.app | Email marketing | Paid | Email marketing with campaigns, automations and transactional email, billed per email sent with unlimited contacts, and an optional bring-your-own-provider rate. |
| MailerLite mailerlite.com · EU | Email marketing | Freemium | Lithuanian email marketing tool with a clean editor, websites and landing pages, where every paid plan has the full feature set and price follows list size. |
| Maileroo maileroo.com | Transactional email | Freemium | An SMTP relay and email API with 3,000 free outbound and 1,000 inbound emails a month, paid plans from $10 for 25,000 emails and a free dedicated IP from 250,000. |
| MailerSend mailersend.com | Transactional email | Freemium | A transactional email API and SMTP relay with a $7 Hobby plan, inbound routing, template builders for non-developers and US/Canada SMS on paid plans. |
| Mailgun mailgun.com · EU | Transactional email | Freemium | An email API and SMTP relay with US and EU hosting from one account, inbound routing and a permanent 100-emails-a-day free plan. |
| Mailjet mailjet.com · EU | Transactional email | Freemium | A French email platform that combines a send API and SMTP relay with a drag-and-drop campaign editor, priced by monthly email volume with unlimited contacts from Essential. |
| MailPace mailpace.com · EU | Transactional email | Paid | A small, independent, EU-hosted transactional email service with no open or click tracking by design, every feature on every plan, and idempotent API requests. |
| Mailtrap Email API/SMTP mailtrap.io | Transactional email | Freemium | An email API and SMTP service paired with Mailtrap's well-known testing sandbox, with a 4,000-email free plan and $30 for 100,000 emails. |
| Mantine mantine.dev · OSS | UI libraries | Open source | A free React library with 100+ styled components, 70+ hooks and packages for forms, dates, charts and notifications, styled with CSS modules rather than CSS-in-JS. |
| Material UI (MUI) mui.com · OSS | UI libraries | Freemium | MIT-licensed React components implementing Material Design since 2014, with paid MUI X Pro and Premium licences for advanced data grid, charts, pickers and scheduler features. |
| Mautic mautic.org · OSS · EU | Email marketing | Open source | Large open-source marketing automation platform with a campaign builder, email and landing page builders, lead scoring and a REST API, self-hosted for full data control. |
| Microsoft Entra External ID microsoft.com | Auth | Freemium | Microsoft's customer and guest identity service, successor to Azure AD B2C, free for the first 50,000 monthly active users and billed through an Azure subscription. |
| Microsoft Foundry (Azure OpenAI) azure.microsoft.com · EU | AI APIs | Paid | Azure's model platform: OpenAI GPT models as Azure OpenAI plus Claude and other models, billed to Azure with Global, Data Zone (EU/US) and Regional deployments. |
| MikroORM mikro-orm.io · OSS | ORMs | Open source | TypeScript ORM built on Data Mapper, Unit of Work and Identity Map patterns, with change tracking, SQL and MongoDB drivers, and a dependency-free core since version 7. |
| MinIO (AIStor) min.io · OSS | Storage | Open source | Once the default self-hosted S3 server; its AGPL community edition is now archived and unmaintained, and development continues only in the commercial AIStor product. |
| Mistral API (Mistral Studio) mistral.ai · EU | AI APIs | Freemium | French model maker's API for Mistral Large, Medium, Small, Codestral, OCR and Voxtral models, most with open weights, and an EU inference option. |
| Mollie mollie.com · EU | Payments | Paid | Amsterdam-based payment processor for businesses in the EEA, Switzerland and the UK, with published per-method fees and 35+ European local payment methods. |
| MongoDB Atlas mongodb.com · EU | Databases | Freemium | MongoDB's managed cloud service on AWS, Azure and Google Cloud, with a free 512 MB cluster, usage-priced Flex clusters and dedicated clusters that add search, vector search and sharding. |
| Moosend moosend.com | Email marketing | Paid | Low-priced email marketing and automation platform with unlimited sends on its Pro plan, website tracking triggers and an SMTP server, but no permanent free plan. |
| Myra Security myrasecurity.com · EU | CDN and DNS | Paid | German, BSI-certified provider of WAF, DDoS protection, bot management and CDN for critical infrastructure, with optional data processing only in Germany. |
| Name.com name.com | Registrars | Paid | Registrar with a well-documented REST API and reseller program, free WHOIS privacy through Domain Safe, but no DNSSEC on its own nameservers. |
| NameBright namebright.com | Registrars | Paid | Denver registrar built for large portfolios, with a flat $10.99 .com, at-cost pricing for pre-funded accounts, free privacy and an API. |
| Namecheap namecheap.com | Registrars | Paid | Large retail registrar with frequent first-year discounts, free lifetime WHOIS privacy and free DNS with DNSSEC, but a .com renewal well above cost. |
| NameSilo namesilo.com | Registrars | Paid | Registrar with renewals never above registration price, free privacy and DNS, and a no-fee discount program that drops .com to about $11 when you pay from account funds. |
| Neon neon.com · OSS · EU | Databases | Freemium | Serverless Postgres that separates storage from compute, scales to zero when idle and creates copy-on-write database branches in seconds; part of Databricks since 2025. |
| NestJS nestjs.com · OSS | Backend | Open source | An Angular-inspired TypeScript framework for Node with modules, dependency injection and decorators, running on Express or Fastify, with paid devtools, deployment and support. |
| netcup VPS netcup.com · EU | VPS | Paid | German host with low-cost KVM vServers in Europe, the US and Singapore, discounts for 12- and 24-month terms, and cheap block storage up to 8 TB. |
| Netim netim.com · EU | Registrars | Paid | French registrar with 1,300+ extensions including about 450 ccTLDs, a reseller API and WHMCS modules, and flat .com pricing around €16 before VAT. |
| Netlify netlify.com | PaaS | Freemium | Git, CLI or drag-and-drop hosting for static and full-stack web projects, billed since September 2025 in credits that cover deploys, bandwidth, compute and requests. |
| New Relic newrelic.com · EU | Monitoring | Freemium | Full-stack observability billed by data ingested and user seats instead of hosts, with a free tier of 100 GB a month and one full user. |
| Next.js nextjs.org · OSS | Frameworks | Open source | Vercel's MIT-licensed full-stack React framework with the App Router, React Server Components, Turbopack builds and, since 16.2, a stable adapter API for other hosts. |
| NextReset nextreset.ai | Monitoring | Free | Free independent dashboard for OpenAI and Anthropic incidents, Codex reset announcements and client releases, with source links, RSS and optional browser alerts. |
| Nhost nhost.io · OSS · EU | Databases | Freemium | Open-source backend platform that gives each project a dedicated PostgreSQL database with an instant Hasura GraphQL API, authentication, file storage and serverless functions. |
| Nile thenile.dev · EU | Databases | Freemium | Serverless PostgreSQL built for B2B SaaS: each customer gets a virtual tenant database inside one Postgres, with tenant isolation, pgvector and built-in auth. |
| Njalla njal.la | Registrars | Paid | Privacy-first domain service that registers domains in its own name on your behalf, accepts cryptocurrency, and includes anycast DNS and DNSSEC. |
| Northflank northflank.com · EU | PaaS | Freemium | A developer platform built on Kubernetes that runs services, jobs, databases and GPU workloads on Northflank's cloud or inside your own AWS, GCP, Azure or other cluster. |
| Notifuse notifuse.com · OSS · EU | Email marketing | Open source | Open-source, self-hostable newsletter and transactional email platform that sends through your own provider (SES, Postmark and others), with a paid cloud priced by active contacts. |
| Novita AI novita.ai | AI APIs | Paid | Low-cost API for 200+ open-weight text, image, audio and video models, plus GPU instances and agent sandboxes, with batch jobs at half price. |
| Nuxt nuxt.com · OSS | Frameworks | Open source | The main full-stack framework for Vue: file-based routing, auto-imports, hybrid rendering and the Nitro server engine, which builds for Node, static hosting, serverless or edge. |
| Nuxt UI ui.nuxt.com · OSS | UI libraries | Open source | A free Vue component library with 125+ Tailwind CSS components on Reka UI; v4 (September 2025) merged the paid Nuxt UI Pro into it, including templates and the Figma kit. |
| Oban oban.pro · OSS | Jobs and queues | Open source | Apache-licensed job processing for Elixir backed by PostgreSQL, MySQL or SQLite, keeping job history for inspection, with Oban Pro adding durable workflows and global limits. |
| OneUptime oneuptime.com · OSS · EU | Monitoring | Freemium | Open-source platform that bundles uptime monitoring, status pages, incident management, on-call, logs, traces, metrics and error tracking, hosted with $1 monitors or self-hosted. |
| OpenAI API openai.com | AI APIs | Paid | Pay-per-token API for OpenAI's GPT-5.x, image, realtime voice and embedding models, with Batch, Flex and Priority processing modes priced separately. |
| OpenObserve openobserve.ai · OSS · EU | Monitoring | Open source | Rust-based, AGPL-licensed observability platform for logs, metrics, traces, RUM and errors, storing data as Parquet on object storage, self-hostable or in the cloud per GB ingested. |
| Openprovider openprovider.com · EU | Registrars | Freemium | Dutch reseller-focused registrar where a paid membership gives domains at registry cost price across 1,900+ extensions, with free WHOIS privacy for members. |
| OpenRouter openrouter.ai | AI APIs | Freemium | One API and one credit balance for models from OpenAI, Anthropic, Google and many open-model providers, with free models and provider fallback. |
| openstatus openstatus.dev · OSS · EU | Monitoring | Freemium | Open-source status page and uptime monitoring platform checking from 28 regions across three clouds, with monitors defined as YAML, Terraform or CLI and flat pricing with unlimited members. |
| Oracle Cloud Infrastructure Compute oracle.com · EU | VPS | Freemium | Oracle's cloud VMs with the most generous permanent free tier among major clouds: two AMD micro VMs plus 2 Arm OCPUs and 12 GB RAM at no cost. |
| Orb withorb.com | Payments | Paid | Usage-based billing engine for high-volume SaaS and AI companies, with SQL-defined metrics, real-time ingestion and price-migration tools, sold only by quote. |
| Ory Network ory.com · OSS · EU | Auth | Open source | Headless, API-first identity from the makers of the open-source Kratos, Hydra and Keto projects, offered self-hosted or as the Ory Network SaaS billed per average daily active user. |
| OVHcloud Domains ovhcloud.com · EU | Registrars | Paid | Domain registration from the French cloud provider, with a $9.20 first-year .com, a $14.69 renewal, DNSSEC support and a small hosting plan included. |
| OVHcloud Object Storage ovhcloud.com · EU | Storage | Paid | French S3-compatible object storage with five classes from NVMe to tape, and no charges for egress, ingress or API calls. |
| OVHcloud VPS ovhcloud.com · EU | VPS | Paid | French provider's VPS range with unlimited traffic, daily backups and anti-DDoS included, starting at 2 vCores and 4 GB RAM for a few dollars a month. |
| Paddle paddle.com | Payments | Paid | London-based merchant of record for SaaS, apps and digital products, charging an all-in 5% + 50¢ per checkout transaction that covers payments, subscriptions and global tax. |
| Park UI park-ui.com · OSS | UI libraries | Open source | Styled, copy-in components built on Ark UI and Panda CSS for React, Solid and Vue, with a configurator for fonts, gray and accent colors and radius. |
| PayPal Braintree braintreepayments.com | Payments | Paid | PayPal's developer-facing card processor, now branded PayPal Enterprise Payments, combining card, wallet, PayPal and Venmo acceptance with vaulting and published US rates. |
| PayPal Checkout paypal.com · EU | Payments | Paid | PayPal's merchant checkout for wallet, card, Venmo and Pay Later payments, with published per-country fees and buyers who already have PayPal accounts. |
| Paystack paystack.com | Payments | Paid | Lagos-founded payment gateway for businesses in Nigeria, Ghana, Kenya, South Africa and Côte d'Ivoire, with capped local fees and card, bank transfer, USSD and mobile money. |
| Peewee github.com · OSS | ORMs | Open source | Small, single-module Python ORM with no required dependencies, an expressive query builder, asyncio support since 4.0 and diff-based migrations, maintained by one author since 2010. |
| Pethost pethost.dev · EU | PaaS | Paid | Managed hosting for Docker Compose apps, bots and databases on a private EU virtual machine, with a flat monthly price, GitHub deploys, nightly backups and MCP tools for coding agents. |
| pg-boss pgboss.io · OSS | Jobs and queues | Open source | MIT-licensed Node.js job queue on PostgreSQL using SKIP LOCKED, with cron, retries, dead-letter queues, priorities, pub/sub fan-out and an optional dashboard. |
| Phoenix phoenixframework.org · OSS | Backend | Open source | An Elixir web framework on the Erlang VM with LiveView for server-rendered interactive pages, built-in PubSub, Channels and Presence for real-time features. |
| Pingdom pingdom.com | Monitoring | Paid | SolarWinds' website monitoring service for uptime, page speed and scripted transaction checks from 100+ locations, plus real user monitoring, sold in check-count tiers with no free plan. |
| PlanetScale planetscale.com · EU | Databases | Paid | Managed Postgres and Vitess-based MySQL on dedicated clusters, with NVMe-backed Metal instances, per-environment branches and sharding for very large workloads, from $5 a month. |
| Plunk useplunk.com · OSS · EU | Transactional email | Open source | An AGPL open-source email platform for transactional email, campaigns and workflow automations, EU-hosted in the cloud at $0.001 per email with unlimited free contacts. |
| Pocket ID pocket-id.org · OSS · EU | Auth | Open source | A small, self-hosted OpenID Connect Certified provider where users sign in only with passkeys, popular with self-hosters who find Keycloak too heavy. |
| Polar polar.sh · OSS | Payments | Paid | Open-source merchant of record for software and AI products, with usage metering, credits and subscriptions, and plans that trade a monthly fee for lower transaction rates. |
| Porkbun porkbun.com | Registrars | Paid | US registrar that sells .com at the same price every year and bundles WHOIS privacy, SSL, Cloudflare-powered DNS and email forwarding for free. |
| Postmark postmarkapp.com | Transactional email | Freemium | A transactional-first email API and SMTP service that keeps bulk mail on separate message streams and retains 45 days of full message history. |
| PrimeReact primereact.dev | UI libraries | Freemium | PrimeTek's 80+ component React suite with styled, unstyled and Tailwind modes; from v11 it is licensed under PrimeUI: free Community for small organisations, $599 per developer otherwise. |
| PrimeVue primevue.org | UI libraries | Freemium | PrimeTek's 80+ component Vue suite with styled and unstyled modes; PrimeVue 5 is the first release under the PrimeUI licence, free only for eligible small organisations. |
| Prisma ORM prisma.io · OSS | ORMs | Freemium | Schema-first TypeScript ORM that generates a typed client and migrations from one schema file; free and open source, with paid hosted Postgres and hosting alongside. |
| Prisma Postgres prisma.io · EU | Databases | Freemium | Managed PostgreSQL from the makers of Prisma ORM, billed per query operation and storage instead of compute size, with a no-card free plan and spend limits. |
| PropelAuth propelauth.com | Auth | Freemium | Hosted authentication built for B2B products, with organizations as a core concept, 10,000 free MAU and unlimited SAML/OIDC SSO connections from the $150 Growth plan. |
| PythonAnywhere pythonanywhere.com | PaaS | Freemium | Python-only hosting with an in-browser IDE, consoles and scheduled tasks, where a Django or Flask site goes live in minutes; free beginner accounts and paid plans from $10 a month. |
| Quarkus quarkus.io · OSS | Backend | Open source | A container-first Java framework that moves work to build time for fast startup and low memory, with live reload, native executables via GraalVM and standards-based APIs. |
| QUIC.cloud quic.cloud | CDN and DNS | Freemium | WordPress-focused CDN from the LiteSpeed ecosystem that caches dynamic pages, with a free unlimited-bandwidth plan on 6 PoPs and a $0.02/GB global plan. |
| Qwik qwik.dev · OSS | Frameworks | Open source | JSX framework that skips hydration: pages resume where the server left off and load small pieces of JavaScript only when the user interacts, with Qwik City (Qwik Router) for routing. |
| RackNerd KVM VPS racknerd.com · EU | VPS | Paid | US budget host with KVM VPS in 12 North American and European locations, RAID-10 SSD storage and 1 Gbps ports, known for annual-billed deals. |
| Radix UI radix-ui.com · OSS | UI libraries | Open source | Unstyled, accessible React primitives such as Dialog, Dropdown Menu and Popover, maintained by WorkOS and used underneath shadcn/ui and many design systems. |
| Railway railway.com · EU | PaaS | Freemium | A container platform that bills CPU, memory and disk per second of actual use, with a visual project canvas and one-click Postgres, MySQL, Redis and MongoDB templates. |
| Razorpay razorpay.com | Payments | Paid | India's large payment gateway with a flat 2% platform fee on domestic methods including UPI, now also offering card processing to US businesses at 2.70% + $0.30. |
| React react.dev · OSS | Frameworks | Open source | The most used JavaScript UI library, now owned by the React Foundation under the Linux Foundation; react.dev recommends starting new apps with a framework such as Next.js or React Router. |
| React Aria and React Spectrum react-spectrum.adobe.com · OSS | UI libraries | Open source | Adobe's React Aria provides 50+ unstyled components with deep accessibility and internationalization; React Spectrum is Adobe's styled design system built on it. |
| React Router (framework mode) reactrouter.com · OSS | Frameworks | Open source | The long-running React router whose v7 absorbed Remix: use it as a plain router, or in framework mode with loaders, actions, SSR, SPA or static output via a Vite plugin. |
| Recurly recurly.com | Payments | Paid | Subscription management platform aimed at high-volume consumer and DTC subscriptions, with churn-recovery tools, 20+ gateways and a Starter plan at $249/mo plus 0.9%. |
| Redis Cloud redis.io · EU | Databases | Freemium | Redis Inc.'s own managed Redis 8, with search, JSON and vector features on AWS, Google Cloud and Azure, from a free 30 MB database to dedicated clusters. |
| RedwoodSDK rwsdk.com · OSS | Frameworks | Open source | The successor to RedwoodJS: a Vite-plugin React framework with Server Components, server functions and realtime state, built only for Cloudflare Workers, D1, R2 and Durable Objects. |
| Regery regery.com | Registrars | Paid | Low-cost registrar with a .com renewal of $11.49, free Privacy Guard, DNSSEC support, free forwarding and a free transfer-in service. |
| Remix 3 remix.run · OSS | Frameworks | Open source | The Remix team's new, React-free full-stack framework in a single package: server runtime, routing, auth, sessions, database tooling, its own UI runtime and components, built on Web APIs. |
| Render render.com · EU | PaaS | Freemium | A Heroku-style platform for web services, workers, cron jobs, static sites, Postgres and Redis-compatible Key Value, with fixed-size instances billed per second. |
| Replicate replicate.com | AI APIs | Paid | API for running community and official AI models, mostly image, video and audio, billed per second of hardware or per output. |
| Resend resend.com | Transactional email | Freemium | A developer-focused email API with React Email support, a 3,000-email free tier and published volume pricing up to 2.5 million emails a month. |
| Restate restate.dev · EU | Jobs and queues | Open source | Low-latency durable execution runtime shipped as one Rust binary with no external database, offering workflows, keyed state, queues and timers, self-hosted or as Restate Cloud. |
| River riverqueue.com · OSS | Jobs and queues | Open source | Open-source job queue for Go backed by PostgreSQL or SQLite, with transactional enqueueing, periodic and unique jobs and a web UI; River Pro adds workflows and concurrency limits. |
| Rollbar rollbar.com | Monitoring | Freemium | Real-time error tracking with grouping, deploy tracking and session replay, unlimited users on every plan, and a hard stop at the plan limit by default to avoid surprise bills. |
| Ruby on Rails rubyonrails.org · OSS | Backend | Open source | The convention-over-configuration full-stack Ruby framework with Active Record, mail, WebSockets, jobs and file uploads built in, created by David Heinemeier Hansson. |
| SambaNova Cloud (SambaCloud) cloud.sambanova.ai | AI APIs | Freemium | Inference API running open-weight models such as DeepSeek, gpt-oss, Gemma, Llama and MiniMax on SambaNova's own RDU chips, with a small free tier. |
| Sav sav.com | Registrars | Paid | Chicago registrar and domain marketplace with one of the lowest .com renewals, free privacy, DNS and forwarding, and no-fee backorders. |
| Scalekit scalekit.com · EU | Auth | Freemium | Auth runtime for AI agents: delegated OAuth, an encrypted token vault and 500+ connectors so agents act as the user, plus drop-in OAuth 2.1 for MCP servers. |
| Scaleway Generative APIs scaleway.com · EU | AI APIs | Paid | French cloud's OpenAI-compatible API for open-weight models hosted in Paris, priced in euros, with 1M free tokens for new customers. |
| Scaleway Instances scaleway.com · EU | VPS | Paid | French cloud VMs in Paris, Amsterdam and Warsaw with no egress fees, hourly billing and a full European cloud platform around them. |
| Scaleway Managed Databases scaleway.com · EU | Databases | Paid | French cloud provider's managed PostgreSQL and MySQL on dedicated VMs, plus a scale-to-zero Serverless SQL Database, all hosted in Paris, Amsterdam or Warsaw. |
| Scaleway Object Storage scaleway.com · EU | Storage | Paid | French S3-compatible object storage with Multi-AZ, One Zone and Glacier classes, no request fees and 75 GB of free egress each month. |
| Scaleway Transactional Email (TEM) scaleway.com · EU | Transactional email | Freemium | A French cloud provider's transactional email service hosted in Paris, billed at €0.25 per 1,000 emails after 300 free, with a €80 plan adding a dedicated IP and SLA. |
| Scalingo scalingo.com · EU | PaaS | Paid | French Heroku-style PaaS and DBaaS with all data centers in Europe, per-minute billing, containers that never sleep, and ISO 27001, HDS and SecNumCloud options. |
| SeaORM sea-ql.org · OSS | ORMs | Open source | Async Rust ORM built on SeaQuery and SQLx, with familiar ActiveRecord-like entities, relation loading without N+1 queries, a CLI to generate entities, and a free admin panel add-on. |
| SeaweedFS seaweedfs.com · OSS | Storage | Open source | Apache-licensed distributed storage that serves S3 objects, POSIX files, WebDAV, HDFS and Iceberg tables from one cluster, with a paid Enterprise edition. |
| Sender sender.net · EU | Email marketing | Freemium | Budget email and SMS marketing platform with a free plan for 2,500 contacts and 15,000 emails a month that includes automation, landing pages and transactional email. |
| Sendy sendy.co · EU | Email marketing | Paid | Self-hosted newsletter application sold for a one-time $69 fee that sends through Amazon SES, so ongoing cost is roughly $1 per 10,000 emails. |
| Sentry sentry.io · EU | Monitoring | Freemium | Error tracking with stack traces, tracing, session replay, logs and cron/uptime checks, all linked by trace, with a free single-user plan and a self-hosted option. |
| Sequelize sequelize.org · OSS | ORMs | Open source | Long-running Node.js ORM with models, associations, eager loading and soft deletes across many SQL databases; version 6 is stable while version 7 has stayed in alpha for years. |
| Sevalla sevalla.com · EU | PaaS | Freemium | Kinsta's developer platform for applications, managed databases, R2-backed object storage and free static sites, with 25 data center locations and no seat pricing. |
| shadcn-svelte shadcn-svelte.com · OSS | UI libraries | Open source | An unofficial, community-led Svelte port of shadcn/ui: copy-in components built with Bits UI and Tailwind CSS, targeting Svelte 5 and Tailwind v4. |
| shadcn-vue shadcn-vue.com · OSS | UI libraries | Open source | A community Vue port of shadcn/ui: a CLI copies Tailwind-styled, accessible Vue components into your project so you own and edit the code. |
| shadcn/ui ui.shadcn.com · OSS | UI libraries | Open source | Open-source React components that a CLI copies into your project as source code, styled with Tailwind CSS and built on Radix, Base UI or React Aria primitives. |
| Sidekiq sidekiq.org · OSS | Jobs and queues | Open source | Ruby's most widely used background job system: multithreaded workers on Redis, free under LGPL, with paid Pro and Enterprise editions adding batches, cron and rate limits. |
| SigNoz signoz.io · OSS · EU | Monitoring | Open source | Open-source, OpenTelemetry-native alternative to Datadog with APM, traces, logs, metrics and alerts in one UI, self-hostable free or on SigNoz Cloud from $49 a month. |
| Skeleton skeleton.dev · OSS | UI libraries | Open source | An open-source design system on Tailwind CSS with themes and utility classes, plus Zag.js-based component libraries for Svelte 5 and React. |
| SMTP2GO smtp2go.com | Transactional email | Freemium | An SMTP relay and email API with a permanent 1,000-email free plan, servers worldwide and phone, chat and ticket support on every paid plan. |
| SocketLabs socketlabs.com | Transactional email | Paid | An email delivery platform with SMTP and an injection API, reputation scoring, a dedicated IP on its $89.95 Pro plan and routing across other providers for large senders. |
| Solid Queue github.com · OSS | Jobs and queues | Open source | MIT-licensed, database-backed Active Job backend that is the default in new Rails 8 apps, running jobs from MySQL, PostgreSQL or SQLite without Redis. |
| SolidStart docs.solidjs.com · OSS | Frameworks | Open source | Meta-framework for SolidJS with CSR, SSR and SSG; v2 (August 2026) moved to Vite and Nitro v3, but the Solid team is retiring it in favour of Solid 2.0's built-in start mode. |
| Spaceship spaceship.com | Registrars | Paid | Newer registrar with one of the lowest .com renewal prices, free domain privacy and DNSSEC on by default with its nameservers. |
| SparkPost sparkpost.com | Transactional email | Freemium | Bird's email sending service with a no-card free tier of 1,000 emails, flat volume plans from $15 for 50,000 emails and overage capped at five times the plan. |
| Spring Boot spring.io · OSS | Backend | Open source | The opinionated way to build stand-alone Spring applications in Java or Kotlin, with embedded servers, starter dependencies, auto-configuration and production metrics, plus paid Tanzu Spring support. |
| SQLAlchemy sqlalchemy.org · OSS | ORMs | Open source | Python's standard SQL toolkit and ORM: a Core expression language plus a unit-of-work ORM, with Alembic for migrations and dialects for most SQL databases; version 2.1 shipped in September 2026. |
| sqlc sqlc.dev · OSS | ORMs | Open source | Compiler that turns hand-written SQL queries and your schema into type-safe Go code, with plugins for Kotlin, Python, TypeScript and community languages; catches SQL errors at build time. |
| SQLModel sqlmodel.tiangolo.com · OSS | ORMs | Open source | Thin Python ORM from the FastAPI author that combines SQLAlchemy and Pydantic, so one annotated class is both the database table and the API data model. |
| SQLx github.com · OSS | ORMs | Open source | Async, pure-Rust SQL toolkit whose macros check hand-written SQL against a real database at compile time; supports PostgreSQL, MySQL, MariaDB and SQLite, with a CLI for migrations. |
| Square Payments squareup.com · EU | Payments | Paid | Square's card processing for in-person and online sales, with free POS software, developer APIs, and cheaper rates for API payments than for its hosted online checkout. |
| Squarespace Domains domains.squarespace.com | Registrars | Paid | Registrar that took over Google Domains customers, with all-in pricing that includes taxes and fees, free privacy and DNSSEC, and a $20 .com. |
| Stackhero stackhero.io · EU | Databases | Paid | European managed-services platform running PostgreSQL, MySQL, MariaDB, Redis, Valkey, ClickHouse and dozens more on dedicated instances with flat hourly pricing. |
| Starlight starlight.astro.build · OSS | Frameworks | Open source | The Astro team's documentation framework: Markdown, MDX or Markdoc pages with navigation, search, i18n and components, output as static HTML with little JavaScript. |
| Storj storj.io | Storage | Paid | S3-compatible object storage that erasure-codes data across thousands of independent nodes worldwide, at $7 per TB stored and $7 per TB of egress. |
| Stripe Billing stripe.com · EU | Payments | Paid | Stripe's subscription and invoicing layer on top of Stripe Payments, priced as a percentage of billing volume or as an annual plan paid monthly. |
| Stripe Managed Payments stripe.com · EU | Payments | Paid | Stripe's merchant-of-record option for digital products: Stripe becomes the seller and handles tax in 80+ countries, fraud, disputes and buyer support for 3.5% on top of processing. |
| Stripe Payments stripe.com · EU | Payments | Paid | API-first card and local payment processing with pay-as-you-go pricing, 100+ payment methods and an ecosystem of add-ons for billing, tax, fraud and marketplaces. |
| Stytch stytch.com | Auth | Freemium | API-first authentication with multi-tenant B2B organizations, five free SSO or SCIM connections, and built-in bot and fraud detection; now part of Twilio. |
| Sucuri Website Firewall sucuri.net | CDN and DNS | Paid | Cloud WAF and anycast CDN for websites from $9.99/mo, with virtual patching and DDoS mitigation, plus platform plans that add unlimited malware cleanups. |
| Supabase supabase.com · OSS · EU | Databases | Freemium | Open-source Postgres platform that bundles a dedicated database with auth, file storage, edge functions, realtime and auto-generated REST and GraphQL APIs. |
| SuperTokens supertokens.com · OSS · EU | Auth | Open source | Open-source login and session management that runs on your own domain, free to self-host at any scale, or managed at $0.02 per monthly active user. |
| SvelteKit svelte.dev · OSS | Frameworks | Open source | The official Svelte application framework: file-based routing, per-route SSR, CSR or prerendering, and small adapters that target Node, static hosts, Vercel, Netlify or Cloudflare. |
| Sweego sweego.io · EU | Transactional email | Freemium | A French email and SMS sending API from the team behind Mindbaz, with data centers in France, a 100-emails-a-day free plan and inbound routing on paid plans. |
| Symfony symfony.com · OSS | Backend | Open source | A full-stack PHP framework and a set of reusable components used by Drupal, Laravel and Composer, with a strict release calendar and three-year LTS versions. |
| Tailwind Plus tailwindcss.com | UI libraries | Paid | The official paid Tailwind CSS collection (formerly Tailwind UI): 500+ UI blocks, Next.js templates and the Catalyst React kit, closed to new customers since September 2026. |
| TanStack Start tanstack.com · OSS | Frameworks | Open source | Full-stack framework built on the type-safe TanStack Router, adding full-document SSR, streaming, server functions and middleware, with Vite or Rsbuild builds for many hosts. |
| Temporal Cloud temporal.io · OSS · EU | Jobs and queues | Paid | Managed service for Temporal, the MIT-licensed durable execution engine: workflows written in code survive crashes and deploys, billed per action with no base fee. |
| TiDB Cloud pingcap.com · OSS · EU | Databases | Freemium | Managed TiDB, a distributed MySQL-compatible database with row and columnar storage, from a free scale-to-zero Starter tier up to dedicated multi-cloud clusters. |
| Tiger Cloud tigerdata.com · EU | Databases | Freemium | Managed PostgreSQL from the makers of TimescaleDB (formerly Timescale Cloud), tuned for time-series and analytics with columnar compression and tiered object storage. |
| Tigris tigrisdata.com · EU | Storage | Freemium | S3-compatible object storage that distributes data across regions behind one global endpoint, with zero egress fees and a free tier. |
| Time4VPS Linux VPS time4vps.com · EU | VPS | Paid | Lithuanian budget VPS host with KVM servers in a central European data center, large bandwidth allowances and deep discounts on 1- and 2-year terms. |
| Together AI together.ai | AI APIs | Paid | Prepaid inference cloud for open-weight models such as DeepSeek, Qwen, Kimi, GLM, Llama and gpt-oss, plus dedicated endpoints, fine-tuning and GPU clusters. |
| Tortoise ORM tortoise.github.io · OSS | ORMs | Open source | Async-native Python ORM with a Django-style model and query API, built-in migrations since 1.0, and drivers for SQLite, PostgreSQL, MySQL, SQL Server and Oracle. |
| Trigger.dev trigger.dev · OSS | Jobs and queues | Freemium | Open-source TypeScript background task platform that runs your tasks on its own managed workers with no timeouts, billed per run plus per second of compute. |
| Turso turso.tech · OSS · EU | Databases | Freemium | SQLite-compatible database that runs embedded in your app, as a hosted cloud database or both with sync, and is built for thousands of small per-user or per-tenant databases. |
| Twilio SendGrid Email API twilio.com · EU | Transactional email | Paid | Twilio's long-running email API and SMTP relay, with volume plans from 50,000 to 2.5 million emails and a dedicated IP included from the Pro tier. |
| TypeORM typeorm.io · OSS | ORMs | Open source | Decorator-based TypeScript ORM supporting both Active Record and Data Mapper, with the widest database list in the JavaScript world; reached 1.0 in May 2026 under new maintainers. |
| Ubicloud Managed PostgreSQL ubicloud.com · OSS · EU | Databases | Open source | Managed PostgreSQL on local NVMe disks from an open-source cloud platform, run on Hetzner, Leaseweb, AWS or Google Cloud at prices well below RDS. |
| UpCloud Cloud Servers upcloud.com · EU | VPS | Paid | Finnish cloud with fast MaxIOPS storage, a 99.999% SLA on Premium plans and zero-cost data transfer, billed hourly from €3/mo. |
| Uploadcare uploadcare.com | Storage | Freemium | Hosted file uploading, storage, image and video processing and CDN delivery, billed by operations, with a personal-use free plan and paid plans from $66 a month. |
| UploadThing uploadthing.com | Storage | Freemium | Managed file uploads for full-stack TypeScript apps: type-safe upload routes, drop-in components and hosted storage with unlimited downloads, from $0 for 2 GB. |
| Upstash QStash upstash.com · EU | Jobs and queues | Freemium | HTTP-based message queue and scheduler that delivers messages to your endpoints with retries, delays, cron and dead-letter queue, billed per message. |
| Upstash Redis upstash.com · EU | Databases | Freemium | Serverless Redis-compatible store billed per command or at a flat monthly price, reachable over HTTP from edge and serverless runtimes, with global read replicas. |
| Upsun upsun.com · EU | PaaS | Paid | The successor to Platform.sh: a YAML-configured PaaS where every Git branch can become a preview environment with cloned data, on five clouds in 14 regions. |
| Uptime Kuma uptime.kuma.pet · OSS · EU | Monitoring | Open source | Free, MIT-licensed uptime monitor you run yourself with one Docker command, with 20-second checks, status pages and 90+ notification services. |
| UptimeRobot uptimerobot.com · EU | Monitoring | Freemium | Long-running uptime monitor with 50 free monitors at 5-minute checks, plus paid plans for faster intervals, more status pages and team seats. |
| Uptrace uptrace.dev · OSS · EU | Monitoring | Freemium | OpenTelemetry-native APM on ClickHouse with traces, metrics and logs in one UI, self-hostable from GitHub or hosted in Germany at low per-GB prices with 50 GB free monthly. |
| Userlist userlist.com | Email marketing | Paid | Small, bootstrapped lifecycle email platform for SaaS, with company-level data, visual workflows, in-app messages and transactional email, priced by tracked users. |
| useSend usesend.com · OSS | Transactional email | Open source | An AGPL open-source alternative to Resend and SendGrid that sends through Amazon SES, adds a dashboard, contacts and campaigns, and can be self-hosted or used as a cheap cloud. |
| Vercel vercel.com · EU | PaaS | Freemium | Git-driven hosting for frontend frameworks and serverless functions, built by the Next.js team, with preview deployments and usage-based billing on top of a $20 Pro seat. |
| Vercel Workflows vercel.com · EU | Jobs and queues | Freemium | Durable workflows on Vercel built on the open-source Workflow SDK: mark functions with 'use workflow' and 'use step', billed per state-transition event and data stored. |
| Vertex AI (Gemini Enterprise Agent Platform) cloud.google.com · EU | AI APIs | Paid | Google Cloud's enterprise model platform, now branded Agent Platform, serving Gemini plus partner models such as Claude on a Google Cloud bill. |
| Vike vike.dev · OSS | Frameworks | Open source | Vite-based framework with a stable hook-based core that works with React, Vue, Solid and others, any backend and any host, and plans a pay-what-size licence for larger companies. |
| VitePress vitepress.dev · OSS | Frameworks | Open source | Vue- and Vite-powered static site generator built for technical documentation: Markdown in, static HTML out, then SPA navigation; powers the Vite, Vitest and Vue docs. |
| Vue vuejs.org · OSS | Frameworks | Open source | Independent, MIT-licensed UI framework with HTML-based templates and automatic reactivity that scales from sprinkling onto a static page to SPAs, SSR and static sites. |
| Vuetify vuetifyjs.com · OSS | UI libraries | Open source | An MIT-licensed Vue component framework following Material Design, with layouts, themes and global defaults; Vuetify 4 (February 2026) moved styles into CSS layers. |
| Vultr Cloud Compute vultr.com · EU | VPS | Paid | Hourly-billed cloud VMs in 33 regions on six continents, from a $2.50 IPv6-only instance up to dedicated-CPU VX1 plans and bare metal. |
| Vultr Object Storage vultr.com · EU | Storage | Paid | S3-compatible object storage from Vultr in five performance tiers, each a monthly bundle with 1 TB of storage and 1 TB of transfer and no request fees. |
| Waku waku.gg · OSS | Frameworks | Open source | Minimal React framework designed around Server Components from the start, built on Vite and Hono, where each route can be static, dynamic or a blend; 1.0 reached release candidate in August 2026. |
| Wasabi Hot Cloud Storage wasabi.com · EU | Storage | Paid | S3-compatible hot storage at one flat per-TB price with no egress or API fees, but a 1 TB monthly minimum and 90-day minimum retention. |
| Webdock VPS webdock.io · EU | VPS | Paid | Danish VPS host with a free web-server control panel, daily and weekly snapshots and DDoS protection included, from €2.15/mo under EU jurisdiction. |
| Windmill windmill.dev · OSS | Jobs and queues | Open source | AGPLv3 platform that turns scripts in 20+ languages into jobs, cron schedules, workflows and internal apps, with unlimited executions when self-hosted. |
| WorkOS AuthKit workos.com | Auth | Freemium | Hosted user management free up to one million MAU, with enterprise SSO, SCIM directory sync and audit logs sold per connection for B2B SaaS. |
| xAI API (Grok) docs.x.ai | AI APIs | Paid | xAI's pay-per-token API for Grok models, with prepaid credits or monthly invoicing and a long-context surcharge above 200K tokens. |
| Xata xata.io · OSS · EU | Databases | Open source | Vanilla PostgreSQL with copy-on-write branches that start in seconds, scale to zero when idle, and can carry anonymized production data; open source under Apache 2.0. |
| YugabyteDB Aeon yugabyte.com · OSS · EU | Databases | Freemium | Managed YugabyteDB, an open-source distributed SQL database with a PostgreSQL-compatible API, multi-region and geo-partitioned clusters on AWS, Azure or Google Cloud. |
| Zeabur zeabur.com · EU | PaaS | Freemium | An AI-assisted deployment platform that builds and runs your services on dedicated servers you rent through it (AWS, GCP, Hetzner and others) or bring yourself, with a free dashboard tier. |
| Zitadel zitadel.com · OSS · EU | Auth | Open source | Open-source, multi-tenant identity platform from Switzerland, self-hosted or as Zitadel Cloud with data residency in the EU, US, Switzerland or Australia and pricing by daily active users. |
| Zoho Campaigns zoho.com | Email marketing | Freemium | Zoho's email marketing app with a free plan for 2,000 contacts, unlimited emails on paid plans and tight links to Zoho CRM and other Zoho apps. |
| Zoho ZeptoMail zoho.com · EU | Transactional email | Paid | Zoho's transactional-only email service sold as prepaid credits of 10,000 emails with no monthly fee, hosted in the US, EU, India, Australia, Japan or China. |
No tools match these filters.