FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.
Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms, focusing on flexibility, security and scalability
| Metric | freeswitch | kamailio |
|---|---|---|
| Stars | 4,887 | 2,799 |
| Forks | 1,768 | 1,096 |
| Open Issues | 1,165 | 26 |
| Language | C | C |
| License | NOASSERTION | NOASSERTION |
| Last commit | 2mo ago | 3mo ago |
| Repo age | 7.7y | 12.6y |
| Activity score | 73/100 | 70/100 |
freeswitch has 1.7× more stars (4,887 vs 2,799).
Both are actively maintained (last commit 60d ago vs 77d ago).
kamailio is more established (12.6y vs 7.7y old).
Both are primarily written in C.
