AISend vs Resend
Resend Alternative — 30% cheaper, MCP-native, drop-in compatible
Resend nailed the developer experience for modern transactional email. AISend is built on the same payload spec — same JSON shape, same Bearer token format (re_*), same /emails endpoint — so you migrate by changing only the base URL. What AISend adds: a built-in MCP server (so Claude, Cursor, and other AI agents can send email natively), a zero-setup sandbox sender, and a free tier that's monthly (3,000/mo) rather than daily-capped.
Why Developers Switch from Resend
- No MCP server — AI agents can't natively send email through Resend
- No sandbox sender — every new dev must verify a domain (DNS, hours) before the first 201
- Free tier is daily-capped (100/day) — easy to hit on a bursty hobby project
- Pro tier costs $20/mo vs AISend's $14/mo for the same 50,000 emails
- Single provider (their own infra) — no fallback if their region has issues
- React Email is great if you use React; less helpful for Go, Python, Ruby teams
AISend vs Resend — Feature Comparison
| Feature | AISend | Resend |
|---|---|---|
| MCP server for AI agents | Yes (aisend-mcp on npm) | No |
| Time to first 201 | Under 3 seconds (shared sender) | Hours (DNS verify required) |
| Sandbox sender (no DNS needed) | hello@send.aisend.app | No |
| Drop-in API | Yes — change baseUrl only | — |
| Automatic bounce suppression | Built in | Manual |
| Idempotency keys | Yes | Yes |
| Free Tier | 3,000/month (no daily cap) | 3,000/month (100/day cap) |
| Pro Tier | $14/mo for 50,000 emails | $20/mo for 50,000 emails |
| Business Tier | $63/mo for 100,000 emails | $90/mo for 100,000 emails |
| Custom Domains | Yes | Yes |
| Webhooks | Yes | Yes |
| Bearer token format | re_* (same as Resend) | re_* |
How to Switch from Resend to AISend
- 1Sign up for AISend and create an API key (re_* format, same as Resend)
- 2Change your base URL from https://api.resend.com to https://api.aisend.app
- 3Swap the Bearer token — that's the only required code change
- 4Optional for production: add and verify your sending domain (re-do SPF/DKIM DNS); for testing, send from hello@send.aisend.app immediately
- 5Send. The /emails endpoint, payload, and response shape are unchanged.
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