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Telephone

Telephone is a free, open-source chat app for macOS. Telephone is a VoIP SIP softphone for Mac. It has 1,177 GitHub stars and is released under the GPL-3.0 license. Its source code is on GitHub at 64characters/Telephone.

github.com/64characters/Telephone (opens in a new tab)

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About Telephone

Telephone is a VoIP SIP softphone for Mac. It allows you to make phone calls over the Internet or your company network. If your phone line supports SIP protocol, you can use it on your Mac instead of a physical phone anywhere you have a decent network connection.

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FAQ

Telephone FAQ

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Is Telephone free and open source?

Yes. Telephone's source code is public on GitHub under the GPL-3.0 license, which is OSI-approved or FSF-free, so you can use, copy and change it for free.

How do I install Telephone?

Download the installer for macOS from its GitHub Releases page (latest: 1.6) or the project website.

Is Telephone still maintained?

The repository's most recent commit was on Oct 13, 2026. appsgit only lists apps whose repository had a commit in the last six months.