Head to head
Zerosmtp vs SMTP
Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.
No reviews yet
A free SMTP relay that still takes a username and password, for devices that cannot do OAuth 2.0.
Full listing
No reviews yet
MCP server that sends mail over SMTP, gated behind an allowlist and a human confirmation
Full listingThe short version
Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. The safety scan favours Zerosmtp (92/100 against 83).
| Zerosmtp | SMTP | |
|---|---|---|
| User rating | No reviews yet | No reviews yet |
| Safety grade | A92/100 | B83/100 |
| Adoption | Growing | Growing |
| GitHub stars | 5 | 0 |
| Downloads / week | 41 | 44 |
| Runs where | Your machine (local) | Your machine (local) |
| Gateway-ready | No | No |
| Tools | 4 | 7 |
| Write actions | — | 2 |
| Price per call | Free | Free |
| Licence | MIT | MIT |
| Last release | 2026-09-20 | 2026-09-16 |
| Category |