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Jami vs MicroSIP: catalog facts
Jami	MicroSIP
Free Free software under the GPLv3 or later. A GNU project with no paid tier.	Free Free and open source under the GPL v2.
Windows, macOS, Linux, Android	Windows
Completely peer to peer, with no server relaying data between users No phone number or email needed to create an account	Small and light on system resources Works with standard SIP providers and PBX systems
Peer-to-peer delivery means messages to an offline device wait until it reconnects Connection reliability varies more than with a server-relayed service	Windows only; other desktops need Wine No mobile apps
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-2.0
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 23, 2026

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