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Briar vs Berty: catalog facts
Briar	Berty
Free Free and open source under the GPL.	Free Free and open source, developed by a non-profit.
Linux, Android	Android, iOS
Works with no internet at all, over Bluetooth or local Wi-Fi No central server and no phone number or email needed	No central server; messages travel peer to peer Designed to work offline or on restricted networks
Currently in maintenance mode, with limited new development Both devices must be online at the same time to exchange messages	Developers say it is not yet ready for high-risk use Small team and a smaller user base than mainstream messengers
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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