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Linphone vs Zoiper: catalog facts
Linphone	Zoiper
Free The app and the basic SIP service are free.	Freemium Free softphone, with paid versions sold on the Zoiper site.
Windows, macOS, Linux, Android, iOS	Windows, macOS, Linux, Android, iOS, Browser extension
Works with any standard SIP account Desktop and mobile builds from one project	Native apps on desktop and mobile TLS, SRTP and ZRTP call encryption
Needs a SIP account or PBX to be useful Website is primarily in French	Proprietary, with some features in paid editions Encryption depends on server support
Downloadable app	Downloadable app, Browser extension
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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