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Baresip vs Calls: catalog facts
Baresip	Calls
Free Free and open source under the BSD 3-Clause licence.	Free Free and open source under the GPL-3.0-or-later.
Command line	Linux
Encrypted calls with SRTP and ZRTP Unlimited SIP accounts and calls	Handles both cellular and SIP calls Integrates with the GNOME desktop
No graphical interface in the core program Configuration takes some SIP knowledge	Linux only SIP calling needs an account with a VoIP provider
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	License: GPL-3.0-or-later
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 October 1, 2026

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