Head to head
Lettera vs Agent Relay
Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.
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Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents.
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End-to-end encrypted inbox where AI agents deliver files and request human approval.
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 Agent Relay (83/100 against 60). Lettera is hosted and callable through the gateway; Agent Relay runs on your own machine. Agent Relay has noticeably more public adoption.
| Lettera | Agent Relay | |
|---|---|---|
| User rating | No reviews yet | No reviews yet |
| Safety grade | C60/100 | B83/100 |
| Adoption | New | Growing |
| GitHub stars | – | 9 |
| Downloads / week | – | 40 |
| Runs where | Hosted (remote) | Your machine (local) |
| Gateway-ready | Yes | No |
| Tools | 7 | 4 |
| Write actions | 3 | 2 |
| Price per call | Free | Free |
| Licence | — | MIT |
| Last release | — | 2026-09-02 |
| Category |