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Jami vs Duetto: catalog facts
Jami	Duetto
Free Free software under the GPLv3 or later. A GNU project with no paid tier.	Free Free and open source under the GPL 3.0 or later.
Windows, macOS, Linux, Android	Android, Self-hosted
Completely peer to peer, with no server relaying data between users No phone number or email needed to create an account	End-to-end encrypted audio and video Always-on channel with no calling step
Peer-to-peer delivery means messages to an offline device wait until it reconnects Connection reliability varies more than with a server-relayed service	Limited to two people by design Very new project with little track record
Downloadable app	Downloadable app, Self-hosted
Open source	Open source
License: GPL-3.0	License: GPL-3.0-or-later
No account needed	Not stated if an account is needed
Needs internet	Needs internet
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked October 2, 2026

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