# Agent inbox APIs compared head to head (slim)

> 21 head-to-head comparisons of email inbox APIs for AI agents, grouped by the job each pair shares, with benchmark scores for both sides.

- Full: https://www.anchorterminal.com/compare/agent-inboxes/index.md (~950 tokens) · this version ~880 tokens · JSON https://www.anchorterminal.com/compare/agent-inboxes/index.json · canonical https://www.anchorterminal.com/compare/agent-inboxes/
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

- Ranked table: https://www.anchorterminal.com/categories/agent-inboxes.md
- Shortlist and picks by need: https://www.anchorterminal.com/best/agent-inboxes/index.md

## Ranked

1. [AgentMail API + MCP](https://www.anchorterminal.com/tools/agentmail.md) BB 74.9
2. [Robotomail](https://www.anchorterminal.com/tools/robotomail.md) B 69.8
3. [MailSlurp](https://www.anchorterminal.com/tools/mailslurp.md) B 68.4
4. [mails.ai Agent Email](https://www.anchorterminal.com/tools/mails-ai.md) B 66.7
5. [Inbound](https://www.anchorterminal.com/tools/inbound.md) B 63.7
6. [Cherami](https://www.anchorterminal.com/tools/cherami.md) C 57.6
7. [InboxAPI](https://www.anchorterminal.com/tools/inboxapi.md) C 54.5

## Agent inboxes

- [AgentMail API + MCP vs Cherami](https://www.anchorterminal.com/compare/agentmail-vs-cherami.md): BB 74.9 vs C 57.6
- [AgentMail API + MCP vs Inbound](https://www.anchorterminal.com/compare/agentmail-vs-inbound.md): BB 74.9 vs B 63.7
- [AgentMail API + MCP vs InboxAPI](https://www.anchorterminal.com/compare/agentmail-vs-inboxapi.md): BB 74.9 vs C 54.5
- [AgentMail API + MCP vs mails.ai Agent Email](https://www.anchorterminal.com/compare/agentmail-vs-mails-ai.md): BB 74.9 vs B 66.7
- [AgentMail API + MCP vs MailSlurp](https://www.anchorterminal.com/compare/agentmail-vs-mailslurp.md): BB 74.9 vs B 68.4
- [AgentMail API + MCP vs Robotomail](https://www.anchorterminal.com/compare/agentmail-vs-robotomail.md): BB 74.9 vs B 69.8
- [Cherami vs Inbound](https://www.anchorterminal.com/compare/cherami-vs-inbound.md): C 57.6 vs B 63.7
- [Cherami vs InboxAPI](https://www.anchorterminal.com/compare/cherami-vs-inboxapi.md): C 57.6 vs C 54.5
- [Cherami vs mails.ai Agent Email](https://www.anchorterminal.com/compare/cherami-vs-mails-ai.md): C 57.6 vs B 66.7
- [Cherami vs MailSlurp](https://www.anchorterminal.com/compare/cherami-vs-mailslurp.md): C 57.6 vs B 68.4
- [Cherami vs Robotomail](https://www.anchorterminal.com/compare/cherami-vs-robotomail.md): C 57.6 vs B 69.8
- [Inbound vs InboxAPI](https://www.anchorterminal.com/compare/inbound-vs-inboxapi.md): B 63.7 vs C 54.5
- [Inbound vs mails.ai Agent Email](https://www.anchorterminal.com/compare/inbound-vs-mails-ai.md): B 63.7 vs B 66.7
- [Inbound vs MailSlurp](https://www.anchorterminal.com/compare/inbound-vs-mailslurp.md): B 63.7 vs B 68.4
- [Inbound vs Robotomail](https://www.anchorterminal.com/compare/inbound-vs-robotomail.md): B 63.7 vs B 69.8
- [InboxAPI vs mails.ai Agent Email](https://www.anchorterminal.com/compare/inboxapi-vs-mails-ai.md): C 54.5 vs B 66.7
- [InboxAPI vs MailSlurp](https://www.anchorterminal.com/compare/inboxapi-vs-mailslurp.md): C 54.5 vs B 68.4
- [InboxAPI vs Robotomail](https://www.anchorterminal.com/compare/inboxapi-vs-robotomail.md): C 54.5 vs B 69.8
- [mails.ai Agent Email vs MailSlurp](https://www.anchorterminal.com/compare/mails-ai-vs-mailslurp.md): B 66.7 vs B 68.4
- [mails.ai Agent Email vs Robotomail](https://www.anchorterminal.com/compare/mails-ai-vs-robotomail.md): B 66.7 vs B 69.8
- [MailSlurp vs Robotomail](https://www.anchorterminal.com/compare/mailslurp-vs-robotomail.md): B 68.4 vs B 69.8