Direct IMAP
No third-party mail API sits between you and your mail server. Mail goes straight to your device.
For professions under a duty of confidentiality
Your client mail stays on your computer.
Lawyers, tax advisors, accountants, therapists, journalists — professions where confidentiality is a duty, not a choice. Letos connects straight to your mailbox and sends nothing to a third-party server.
Today you choose between two compromises
Either a fast client with AI, but your client mail passes through someone else's server. Or a slow client with no AI and no help with the volume of mail. Letos gives you both: the AI runs on your computer and mail goes straight to you.
The sync server only ever sees encrypted data
The sync server carries only encrypted content and a thread key — never a message body, never a password. That's verifiable from the outside, not just promised.
Local AI, local assistant
Classification, summaries and reply drafts run on your own computer. The interface for AI assistants reads your data only there, not through our servers.
Provable, not just claimed
It's architecture, not a statement. The app's network traffic can be audited — and that's exactly what you need when the law binds you to confidentiality.
Letos Pro — in the works
A planned plan for professions under a duty of confidentiality. The price is not set yet. We'll launch it once enough people from your field get in touch. Write to [email protected] if you are one of them — it will help shape what Pro includes.
Want an early invite?
Invites go out from December 2026, public launch on 1 January 2027. Leave us your email and we'll tell you the moment there's something to try.
Invites from December 2026 · limited number · public on 1 January 2027