The Resend alternative that keeps your code
Resend, the email sending API for developers.
Switch from Resend to Mailcheer by changing one URL and one key.
Why switch to Mailcheer
- The same fields as Resend's API: to migrate, you change the base URL and the key.
- A three-month calendar: drag a draft onto a date and it sends itself.
- An assistant that writes your newsletters in a conversation, with live web search.
- An MCP server for Claude Code, ChatGPT, Codex and Cursor, and signed webhooks.
Mailcheer takes Resend's API fields as they are: attachments, CC, BCC, reply_to and tags arrive in the same format. One line of configuration changes, and the rest of your code stays in place. In Mailcheer, your campaigns then sit on a three-month calendar, an assistant writes them with you, and an MCP server opens them to Claude Code, ChatGPT, Codex and Cursor.
Feature by feature
| What we look at | Mailcheer | Resend |
|---|---|---|
| Editorial calendar | A three-month calendar: drag a draft onto a date and it sends itself. | Each send is scheduled individually. |
| Attachments | The same attachments field, the same base64 encoding. | Supported. |
Everything written here about Resend comes from their public documentation, checked on September 20 and 21, 2026. No Resend pricing is quoted: it changes. The format compatibility with Mailcheer is described in the API reference.
Our verdict
Choose Mailcheer: you keep your code, change one URL and one key, and plan your campaigns three months ahead. 3,000 emails a month are free, no credit card.
Try it with your own integration
3,000 sends a month free, no credit card. Coming from Resend: change the base URL and the key in your HTTP client, and you are sending.
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