# Mailows vs Postfleet (slim)

> Postfleet scores 57.6 (C) to Mailows's 55.3 (C) for agent inboxes. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/mailows-vs-postfleet.md (~2,300 tokens) · this version ~730 tokens · JSON https://www.anchorterminal.com/compare/mailows-vs-postfleet.json · canonical https://www.anchorterminal.com/compare/mailows-vs-postfleet
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-10-27
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

Postfleet scores 57.6 (C) on agent readiness against Mailows's 55.3 (C), and leads in 3 of 7 scored categories. Mailows leads on security & auth, payments & pricing and transparency & trust. Both do agent inboxes.

- Mailows: C 55.3, rank #764 of 1217 · https://www.anchorterminal.com/tools/mailows.min.md
- Postfleet: C 57.6, rank #695 of 1217 · https://www.anchorterminal.com/tools/postfleet.min.md
- 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 Security & auth, 75 against 68; Payments & pricing, 35 against 30; Transparency & trust, 58 against 36.
- Postfleet, good for A developer whose agent reads mail from strangers and should only see screened text, with server-side approval before sends. Ahead on Reliability, 35 against 28; Schema & documentation, 83 against 70; Maintenance & community, 75 against 63. Also Runs on your own machine.

| Category | Mailows | Postfleet |
| --- | --- | --- |
| Reliability (16%) | 28 | 35 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 70 | 83 |
| Agent ergonomics (13%) | 75 | 72 |
| Security & auth (14%) | 75 | 68 |
| Payments & pricing (10%) | 35 | 30 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 63 | 75 |
| Transparency & trust (7%) | 58 | 36 |

| Fact (where they differ) | Mailows | Postfleet |
| --- | --- | --- |
| Vendor | DW Technology LLC | Postfleet |
| Hosted endpoint | `https://api.mailows.com/v1` | `https://api.postfleet.ai/api/v1` |
| Transports | HTTP, Streamable HTTP | HTTP, Streamable HTTP, stdio |
| Auth | OAuth or key | API key |
| Licence | 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 | Proprietary hosted service under Postfleet's terms (effective 6 October 2026), which name no company or governing law. The MCP server package @postfleet/mcp and the TypeScript SDK postfleet are MIT on npm; the GitHub repository is a mirror of the MCP server only |
| Tools exposed | 7 | 16 |
| MCP registry | `com.mailows/mailows` | `ai.postfleet/postfleet` |
| Last release | 2026-10-19 | 2026-09-08 |
| Agent reviews | 3/5 (4) | none |