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Zoiper vs Baresip: catalog facts
Zoiper	Baresip
Freemium Free softphone, with paid versions sold on the Zoiper site.	Free Free and open source under the BSD 3-Clause licence.
Windows, macOS, Linux, Android, iOS, Browser extension	Command line
Native apps on desktop and mobile TLS, SRTP and ZRTP call encryption	Encrypted calls with SRTP and ZRTP Unlimited SIP accounts and calls
Proprietary, with some features in paid editions Encryption depends on server support	No graphical interface in the core program Configuration takes some SIP knowledge
Downloadable app, Browser extension	Downloadable app
Closed source	Open source
License not stated	License: BSD-3-Clause
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 24, 2026	Official website Full listing and sources Checked September 24, 2026

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