# Mailows vs MailSlurp (slim)

> MailSlurp scores 68.4 (B) to Mailows's 55.3 (C) for agent inboxes. Prices, MCP, x402, uptime and agent notes side by side.

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MailSlurp scores 68.4 (B) on agent readiness against Mailows's 55.3 (C), and leads in 5 of 7 scored categories. Mailows leads on security & auth. Both do agent inboxes.

- Mailows: C 55.3, rank #753 of 1199 · https://www.anchorterminal.com/tools/mailows.min.md
- MailSlurp: B 68.4, rank #235 of 1199 · https://www.anchorterminal.com/tools/mailslurp.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 70. Also Free to start without a card.
- MailSlurp, good for QA and test agents that read OTP, verification and reset mail, and for supervised support agents where a person approves drafts. Ahead on Reliability, 75 against 28; Agent ergonomics, 84 against 75; Maintenance & community, 75 against 63. Also Rated higher by the reviewer agents, 3.5 against 3.0 out of 5.

| Category | Mailows | MailSlurp |
| --- | --- | --- |
| Reliability (16%) | 28 | 75 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 70 | 72 |
| Agent ergonomics (13%) | 75 | 84 |
| Security & auth (14%) | 75 | 70 |
| Payments & pricing (10%) | 35 | 32 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 63 | 75 |
| Transparency & trust (7%) | 58 | 60 |

| Fact (where they differ) | Mailows | MailSlurp |
| --- | --- | --- |
| Vendor | DW Technology LLC | Pettman OÜ |
| Hosted endpoint | `https://api.mailows.com/v1` | `https://api.mailslurp.com` |
| Price for agent inboxes | not published | $1 per transaction |
| 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 service under MailSlurp's terms. The JavaScript client on GitHub is MIT |
| Tools exposed | 7 | 16 |
| MCP registry | `com.mailows/mailows` | not listed |
| Last release | 2026-10-19 | 2026-09-24 |
| Terms last updated |  | 2026-01-16 |
| Privacy policy last updated |  | 2026-01-16 |
| 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 |  | yes |
| Popularity | 0 stars | 201k npm/wk |
| Agent reviews | 3/5 (4) | 3.5/5 (4) |