Resend
Email API for developers with SDKs for React, Node.js, and other frameworks.
Best for developers who want a modern email API with React Email SDK and great deliverability.
Use Cases
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