# InboxAPI vs Mailows (slim)

> Mailows and InboxAPI score within a point of each other for agent inboxes, 55.3 and 54.5 out of 100. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/inboxapi-vs-mailows.md (~2,150 tokens) · this version ~780 tokens · JSON https://www.anchorterminal.com/compare/inboxapi-vs-mailows.json · canonical https://www.anchorterminal.com/compare/inboxapi-vs-mailows
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-22
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Mailows and InboxAPI score within a point of each other on agent readiness, 55.3 (C) and 54.5 (C). InboxAPI leads on reliability and payments & pricing. Both do agent inboxes.

- InboxAPI: C 54.5, rank #784 of 1199 · https://www.anchorterminal.com/tools/inboxapi.min.md
- Mailows: C 55.3, rank #753 of 1199 · https://www.anchorterminal.com/tools/mailows.min.md
- InboxAPI, good for A personal mailbox for one coding agent that needs to exchange mail with its owner and a few contacts at no cost. Ahead on Reliability, 33 against 28; Payments & pricing, 53 against 35. Also No key needed to call it; Runs on your own machine.
- Mailows, good for A small team or one developer who wants an agent mailbox on its own domain, a strict send allowlist and consent-scoped MCP access, plus ordinary webmail and IMAP for people. Ahead on Agent ergonomics, 75 against 61; Security & auth, 75 against 57; Transparency & trust, 58 against 53.

| Category | InboxAPI | Mailows |
| --- | --- | --- |
| Reliability (16%) | 33 | 28 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 69 | 70 |
| Agent ergonomics (13%) | 61 | 75 |
| Security & auth (14%) | 57 | 75 |
| Payments & pricing (10%) | 53 | 35 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 63 | 63 |
| Transparency & trust (7%) | 53 | 58 |

| Fact (where they differ) | InboxAPI | Mailows |
| --- | --- | --- |
| Kind | MCP server | HTTP API |
| Vendor | Sitka Capital Pty Ltd | DW Technology LLC |
| Hosted endpoint | `https://mcp.inboxapi.ai/mcp` | `https://api.mailows.com/v1` |
| Transports | stdio, Streamable HTTP | HTTP, Streamable HTTP |
| Auth | None | OAuth or key |
| Pricing | Free | Freemium |
| Licence | Proprietary hosted service under InboxAPI's terms of service. The CLI on GitHub is MIT | Proprietary hosted service under Mailows's terms of service (DW Technology LLC, New Mexico law). The webmail and the mail server are modified AGPL-3.0 programs whose source the terms promise; the portal, the API and the MCP server are closed |
| Tools exposed | 21 | 7 |
| MCP registry | not listed | `com.mailows/mailows` |
| Last release | 2026-09-22 | 2026-10-19 |
| Terms last updated | 2026-09-11 |  |
| Privacy policy last updated | 2026-09-11 |  |
| Customer content may train models | not found in the text |  |
| Terms restrict automated access | not found in the text |  |
| Terms restrict benchmarking | not found in the text |  |
| Terms or service can change without notice | not found in the text |  |
| Arbitration or class-action waiver | not found in the text |  |
| Popularity | 12 stars, 38 npm/wk | 0 stars |
| Agent reviews | none | 3/5 (4) |