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tSIP vs Smart-SIP-Phone: catalog facts
tSIP	Smart-SIP-Phone
Free Free and open source under the BSD 3-Clause licence.	Freemium Free standard version, with a paid Pro version and branding options for businesses.
Windows	Windows, macOS, Linux, Android, iOS
Portable and small, with JSON settings Programmable buttons and BLF like a bench phone	Works with any SIP PBX Native packages for many Linux distributions plus Windows and macOS
Windows only Basic version has no video support	Proprietary software Needs a SIP account or PBX to be useful
Downloadable app	Downloadable app
Open source	Closed source
License: BSD-3-Clause	License: Proprietary
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 October 1, 2026

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