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BriarSimpleX Chat
Free

Free and open source under the GPL.

 Free

Free and open source under the AGPL 3.0. The company is funded by investment and…

Linux, Android Windows, macOS, Linux, Android, iOS, Command line
  • Works with no internet at all, over Bluetooth or local Wi-Fi
  • No central server and no phone number or email needed
  • No user identifier of any kind, so conversations cannot be correlated by account
  • Double ratchet encryption with an additional layer for the relay servers
  • Currently in maintenance mode, with limited new development
  • Both devices must be online at the same time to exchange messages
  • Connecting means exchanging a link or QR code in person or elsewhere
  • No contact list means a lost device is a lost set of conversations unless backed up
Downloadable app Downloadable app
Open source Open source
License: GPL-3.0 License: AGPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 22, 2026

Checked September 21, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.