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RetroShareBriar
Free

Free and open source with no hidden costs or ads.

 Free

Free and open source under the GPL.

Windows, macOS, Linux, Android Linux, Android
  • Fully decentralized with no central server
  • Chat, mail, forums, channels and file sharing in one app
  • Works with no internet at all, over Bluetooth or local Wi-Fi
  • No central server and no phone number or email needed
  • Useful only once you have friends on the network
  • Releases are infrequent; the current version is 0.6.7a
  • Currently in maintenance mode, with limited new development
  • Both devices must be online at the same time to exchange messages
Downloadable app Downloadable app
Open source Open source
License not stated License: GPL-3.0
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 23, 2026

Checked September 22, 2026

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