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Jami vs Zoiper: catalog facts
Jami	Zoiper
Free Free software under the GPLv3 or later. A GNU project with no paid tier.	Freemium Free softphone, with paid versions sold on the Zoiper site.
Windows, macOS, Linux, Android	Windows, macOS, Linux, Android, iOS, Browser extension
Completely peer to peer, with no server relaying data between users No phone number or email needed to create an account	Native apps on desktop and mobile TLS, SRTP and ZRTP call encryption
Peer-to-peer delivery means messages to an offline device wait until it reconnects Connection reliability varies more than with a server-relayed service	Proprietary, with some features in paid editions Encryption depends on server support
Downloadable app	Downloadable app, Browser extension
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

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