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Briar vs Keet: catalog facts
Briar	Keet
Free Free and open source under the GPL.	Free Free to download and use.
Linux, Android	Windows, macOS, Linux, 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 phone number or email needed to sign up Messages, calls and files go directly between peers with end-to-end encryption
Currently in maintenance mode, with limited new development Both devices must be online at the same time to exchange messages	Losing the 24-word seed phrase can mean losing access to your identity Peer-to-peer design depends on participants' devices rather than a server
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Not stated if it 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.