Kamailio
Modular SIP server (registrar/proxy/router/etc).
Description from awesome-selfhosted (CC BY-SA 3.0)
Still maintained? Yes: 642 commits in the last 90 days, latest release 6.1.5 (Oct 2026).
Also an alternative to Twilio.
At a glance
Kamailio quick facts
- Health score
- 84/100 GOOD
- Stars
- 2,989
- Last commit
- yesterday (Oct 2026)
- Latest release
- 6.1.5, Oct 2026
- Licence
- GPL-2.0
Top alternatives to Kamailio
Full rankings: Twilio alternatives
In its own words
The project's README opens: "20 Years Of Kamailio Development: Sep 3, 2001 - Sep 3, 2021."
Why it ranks here
Health score explained
Kamailio scores 84/100, #5 of 13 in Communication - SIP: 642 commits in the last 90 days earn 35.0 of 35 points, the latest release (6.1.5, 15 days ago) earns 25.0 of 25, 2,989 stars add 13.9 of 20, an active, unarchived repository keeps 10 and no advertised Docker image leaves the final 10 unclaimed. That places it in the good band (70 and above). The biggest shortfall is Docker support, worth 10.0 more points.
Recomputed nightly from the GitHub API. How the score is calculated.
- Commit activity 35.0 / 35
642 commits in 90 days (30+ scores full marks)
- Release recency 25.0 / 25
6.1.5 released 15 days ago
- Stars 13.9 / 20
3k stars on GitHub (logarithmic)
- Not archived 10.0 / 10
Repository is active
- Docker support biggest shortfall 0.0 / 10
No Docker support advertised
Commit activity
- 642
- Last 90 days
- 1,982
- Last 12 months
- yesterday
- Last push
Ranked #5 of 13 tools in Communication - SIP by health , between Asterisk (#4) and FusionPBX (#6) .
Details
| Licence | GPL-2.0 |
| Platforms | C, deb |
| Latest release | 6.1.5 · 15 days ago |
| Stars | 2,989 |
| Open issues | 14 |
| Docker | Not advertised |
| Repository | kamailio/kamailio ↗ |
Kamailio vs its top 5 alternatives
Active tools that share a comparison page or a category with Kamailio (Communication - SIP), scored on the same five terms.
| Tool | Health | Stars | Licence | Last commit |
|---|---|---|---|---|
| Routr | 93 | 1.7k | MIT | today |
| FreeSWITCH | 85 | 5.3k | MPL-2.0 | 2 days ago |
| Asterisk | 84 | 3.7k | GPL-2.0 | yesterday |
| Kamailio (this tool) | 84 | 3k | GPL-2.0 | yesterday |
| Flexisip | 64 | 193 | AGPL-3.0 | today |
| openSIPS | 58 | 1.5k | GPL-2.0 | yesterday |
Kamailio: common questions
What does Kamailio replace?
Repoly lists Kamailio as an open-source alternative to Twilio. Each comparison page ranks every alternative by the same health score, so you can see where Kamailio stands against the others.
Is Kamailio still maintained?
Kamailio had 642 commits in the last 90 days and its last push was yesterday; the latest tagged release, 6.1.5, is from 15 days ago. Repoly recomputes this nightly.