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tSIP vs Baresip: catalog facts
tSIP	Baresip
Free Free and open source under the BSD 3-Clause licence.	Free Free and open source under the BSD 3-Clause licence.
Windows	Command line
Portable and small, with JSON settings Programmable buttons and BLF like a bench phone	Encrypted calls with SRTP and ZRTP Unlimited SIP accounts and calls
Windows only Basic version has no video support	No graphical interface in the core program Configuration takes some SIP knowledge
Downloadable app	Downloadable app
Open source	Open source
License: BSD-3-Clause	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 October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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