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Briar vs Night Drop: catalog facts
Briar	Night Drop
Free Free and open source under the GPL.	Free Free and open source under the AGPL-3.0 licence.
Linux, Android	Android
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, email or account; identity is a local keypair End-to-end encrypted messages sent peer to peer over Tor
Currently in maintenance mode, with limited new development Both devices must be online at the same time to exchange messages	One-to-one chats only, no groups New project with a small user base
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: AGPL-3.0-or-later
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 October 2, 2026

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