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Jami vs Berty: catalog facts
Jami	Berty
Free Free software under the GPLv3 or later. A GNU project with no paid tier.	Free Free and open source, developed by a non-profit.
Windows, macOS, Linux, Android	Android, iOS
Completely peer to peer, with no server relaying data between users No phone number or email needed to create an account	No central server; messages travel peer to peer Designed to work offline or on restricted networks
Peer-to-peer delivery means messages to an offline device wait until it reconnects Connection reliability varies more than with a server-relayed service	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
No account needed	Not stated if an account is needed
Needs internet	Works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 23, 2026

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