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

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