END-TO-END ENCRYPTED · SELF-HOSTED · RUST

Your messages.
Your server.
Nobody else.

A private messenger you run yourself, locked with the Signal Protocol on your devices before anything leaves them.

BUILD v0.1.96doublebit.tail879299.ts.net · Linux .deb
Signal ProtocolPQXDH and the Double Ratchet. Keys are made on your devices and never leave them.
Your own serverOne small Rust program in Docker. Invite-only accounts; messages are deleted once delivered.
Files up to 5 GBEncrypted before upload, photos cleaned of hidden data, all in one FILES tab.
OpenPGP built inYour key on your profile; PGP messages open in the chat, labelled.
The FILES tab: photos shared in every chat, in one grid
FILESEvery photo, file and link from every chat in one place, searchable.
Appearance settings: theme, accent colour and text size
APPEARANCEMono by default. Pick your own accent colour, text size and scanlines.
About: version, encryption and your own server
ABOUTlibsignal on your devices, your own server in Docker, open source under AGPL-3.0.
Host it yourself in minutesAny Linux box with Docker. Your own domain, or private over Tailscale.
$ docker compose up -d
$ doublebit-server invite
Invite code: 7KQ4-M9TX-R2HD