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Jami vs Simlar: catalog facts
Jami	Simlar
Free Free software under the GPLv3 or later. A GNU project with no paid tier.	Free Free and open source under the GPL.
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	Encrypts calls with ZRTP Verifies contacts with a short code on the first call
Peer-to-peer delivery means messages to an offline device wait until it reconnects Connection reliability varies more than with a server-relayed service	Both callers need to be online Call quality depends on the internet connection
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0-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 8, 2026

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