Email, returned to you
A mail client with
no server in the middle.
liber runs the entire mail engine — IMAP, SMTP, Gmail — as WebAssembly inside your browser. Your mail lives on your device, and the only thing our relay ever carries is encrypted bytes it cannot read.
The engine runs in your browser
IMAP, SMTP, POP3 and the Gmail API are all spoken by a Rust engine compiled to WebAssembly. There is no application server in the middle — your browser is the mail client.
The relay only sees ciphertext
TLS is terminated inside the WebAssembly sandbox on your device. The thin relay that carries the connection forwards encrypted bytes it cannot read — not your mail, not your password, not your tokens.
Your mail stays on your device
Messages, drafts and settings are cached locally in your browser (OPFS), encrypted at rest. We run no database and keep no copy of your mail.
Works with what you already use
Connect Gmail with one click, or any IMAP/SMTP or POP3 account. Threading, full-text search, filters, multiple accounts and a unified inbox come standard.
Bring your own mailbox
liber never asks you to move your email anywhere. It connects to the accounts you already have and leaves them where they are. Sign in with Google, or point it at any IMAP, SMTP or POP3 server.
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