Compare
mailsocket vs AgentMail
AgentMail gives AI agents full two-way email. mailsocket is narrower: inboxes that receive mail and hand you the OTP or magic link.
Checked October 2026. Prices and features change, so every AgentMail fact on this page links to AgentMail's own page as the source. Please check there before you decide.
Side by side
| AgentMail | mailsocket | |
|---|---|---|
| Free plan | ✅ 3 inboxes, 3,000 emails/month (source) | ✅ 3 inboxes, 1,000 / month, 1 day retention |
| Entry price | Developer $20/month: 10 inboxes, 10,000 emails/month (source) | Pro $12/mo: 10 inboxes, 10,000 / month |
| Next plan | Startup $200/month: 150 inboxes (source) | Scale $49/mo: 50 inboxes, 50,000 / month |
| Discount for paying yearly | ✅ 20% (source) | ❌ Monthly only |
| Custom domains | ✅ From the $20 Developer plan, 10 domains (source) | ✅ From the Scale plan ($49/mo) |
| WebSocket events | ✅ Yes (source) | ❌ No; a Server-Sent Events stream instead, every plan |
| Webhooks | ✅ Yes (source) | ✅ From the Pro plan |
| MCP server | ✅ Hosted, with OAuth sign-in for Claude and ChatGPT (source) | ✅ Hosted and local, API key only |
| Send, reply and forward email | ✅ Yes (source) | ❌ No, receive only |
| OTP and magic link extracted to their own fields | Not listed in its MCP tools (source) | ✅ Yes, every plan |
| One call that waits for the code | Not listed in its MCP tools (source) | ✅ messages/wait, up to 25s per call, every plan |
| How widely used | ✅ About 1.3 million PyPI downloads of its SDK in the last month (source) | A new service with a small user base |
When to choose AgentMail
- Your agent needs to hold conversations: send, reply and forward, not only receive.
- You want WebSocket events, or custom domains on a $20 plan.
- You want a larger free message allowance each month.
- You connect from Claude or ChatGPT and want OAuth sign-in instead of an API key.
- You want the larger ecosystem: AgentMail is far more widely used today.
When to choose mailsocket
- The job is getting past a verification step: you want the OTP or magic link as a field, not an email to parse.
- You want one call that blocks until the code arrives, with no WebSocket client or webhook receiver to run.
- You write end-to-end tests (pytest, Cypress, Playwright, CI) as well as agents, and want one inbox per test.
- You want a lower entry price: Pro is $12/mo.
Try mailsocket
See it work without an account: the live demo creates an inbox and waits for a code in your browser. When you are ready, sign up for free to get an API key.
Spotted something out of date? Email support@mailsocket.app. See also: all comparisons.