FreeSWITCH
Scalable software telephony platform
FreeSWITCH is a free communications software platform for building voice, video, and chat applications. It functions as a softswitch, PBX, and media gateway with extensive protocol support.
Key features
- Softswitch and PBX
- Voice, video, and chat
- Scriptable call control
- Wide codec and protocol support
Strengths
- Released under the MPL-2.0 license
- First-class Docker support for quick deployment
- Mature project with 5.2k GitHub stars
- Written in C
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