Resend

Email API for developers with SDKs for React, Node.js, and other frameworks.

Use Cases

Send transactional emails (welcome, password reset, receipts) with React Email templates

Build a contact form handler that forwards submissions via Resend's email API

Free Tier

100 emails/day, 3K emails total, custom domain, analytics

How to Maximize the Free Tier

Resend's free tier (100 emails/day, 3K total) is best for development environments and low-volume transactional email. The 3K total cap is a lifetime limit, not monthly — use it sparingly and upgrade to the $10/month plan ($50K emails/month) when you hit it. React Email integration is Resend's standout feature — build your email templates as React components and version them alongside your app code.

Getting Started

Sign up → verify domain (add DKIM/SPF DNS records) → install `resend` npm package → create API key → send first email: `resend.emails.send(...)` → track opens/clicks in dashboard.

Pros

React Email: Write emails as React components with the React Email SDK — familiar DX for frontend developers
Deliverability: Great out-of-the-box deliverability — proper DKIM/SPF setup guidance and reputation management
Daily capacity: 100 emails/day on the free tier is sufficient for development, testing, and small-scale transactional email

Cons

Total cap: 3,000 total email cap on the free tier (not per month — lifetime total). Once hit, you must upgrade to send more.
No inbound: No email parsing or inbound email features on the free tier — receiving emails requires paying plans
No templates: No drag-and-drop email template editor — you'll need to build emails with code or React components

Alternatives

SendGrid7/10★★★½☆Postmark