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Email API for developers

Resend

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.

Visit resend.com ↗ Alternatives Free tier
Resend homepage
§1

Overview

Resend is an email API aimed at application developers. You send through REST, SMTP or SDKs, and you can write templates as React components with its React Email library. Inbound email, batch sending, webhooks, open and link tracking, and DKIM/SPF/DMARC setup are included on every plan, including Free.

The Free plan gives 3,000 emails a month but caps sending at 100 a day, which is fine for a side project but not for a launch-day spike. Pro starts at $20 for 50,000 emails and removes the daily cap. Scale starts at $90 for 100,000 emails and is the first tier with dedicated IPs, SSO and 1,000 domains; for the same 100,000 emails, Pro costs $35, so move to Scale for features, not volume.

Marketing broadcasts are a separate subscription priced by contacts, with unlimited sends to those contacts. Automations include 10,000 runs a month on every plan.

Resend publishes SOC 2 Type II and GDPR compliance. Enterprise plans above 3 million emails a month add a 99.99% uptime SLA and flexible data retention.

§2

Pricing and plans

Free tier

3,000 emails a month, capped at 100 a day, 3 domains, 30-day data retention

At the limit Stops at the limit Sends past the daily or monthly quota are rejected with a 429 error.

Plan Price What you get
Free $0/mo 3,000 emails/month, 100/day, 3 domains
Pro 50k $20/mo 50,000 emails, $0.90/1,000 over, 10 domains, no daily limit
Pro 100k $35/mo 100,000 emails, $0.90/1,000 over
Scale 100k $90/mo 1,000 domains, Slack support, dedicated IP and SSO add-ons
Scale 500k $350/mo 500,000 emails, $0.70/1,000 over
Scale 1M $650/mo 1,000,000 emails, $0.65/1,000 over
Scale 2.5M $1,150/mo 2,500,000 emails, $0.46/1,000 over
Enterprise Custom 3M+ emails, 99.99% SLA, SSO included

Marketing email is priced separately by contacts ($40/mo for 5,000 up to $650/mo for 150,000). Add-ons: 100 extra domains $20/mo, dedicated IP $30/mo (Scale, 3,000+ emails/day), SSO $150/mo (Scale). Automation runs beyond 10,000 a month cost $0.0015 each on paid plans. The pricing page lists 'multi-region' sending but does not state EU data residency, so euRegion is false.

Source: resend.com/pricing · prices as published, excluding tax.

§3

What it does

React Email
Write email templates as React components and send them through the API.
Inbound email
Receive email to your domains on every plan, including Free.
Batch sending
Send many emails in one API call.
Webhooks
Delivery and engagement events; 5 endpoints on Pro and 10 on Scale.
Broadcasts and automations
Contact-priced marketing email plus event-driven automations, 10,000 runs a month included.
CLI and MCP server
A command-line tool and an MCP server for sending and managing email from terminals and AI agents.
§4

Strengths and limitations

Strengths

  • Published price for every volume step from 50,000 to 2.5 million emails
  • Inbound email and webhooks on the free plan
  • $20 covers 50,000 emails, cheaper than most at that volume
  • SOC 2 Type II report

Limitations

  • Free plan is capped at 100 emails a day
  • Dedicated IPs only on Scale and only above 3,000 emails a day
  • SSO costs $150/mo extra on Scale
  • Marketing email is billed separately by contact count
  • Data retention is 30 days on non-Enterprise plans
§5

Who it suits

Good for

  • Next.js and TypeScript apps
  • Side projects that fit in 100 emails a day
  • Startups sending 50,000 to 500,000 emails a month

Look elsewhere if

  • Teams that must keep email data in the EU
  • Senders who want the lowest raw cost per email at high volume
§6

Alternatives to Resend

Tool From Free option Stages
Notifuse Open-source email platform
$19/mo Open source
Brevo Email marketing and transactional platform
$9/mo Free tier
Mailjet Email API, SMTP relay and campaign editor
$9/mo Free tier
Loops Lifecycle email for SaaS
$49/mo Free tier
SparkPost Email sending API
$15/mo Free tier
Mailgun Email API and SMTP relay
$15/mo Free tier

All transactional email APIs →

§7

Questions

Is Resend free?

Yes, the Free plan includes 3,000 emails a month, limited to 100 a day, with 3 sending domains.

How much does Resend cost for 100,000 emails?

$35 a month on Pro, or $90 a month on Scale if you need dedicated IPs, SSO or more domains.

Does Resend support SMTP?

Yes, every plan includes an SMTP relay alongside the REST API and SDKs.

Can Resend receive email?

Yes, inbound email is included on all plans.

Does Resend offer dedicated IPs?

Yes, as a $30/mo add-on on the Scale plan for senders above 3,000 emails a day.

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