Flexisip vs openSIPS
A side-by-side comparison of Flexisip and openSIPS — pricing, license, deployment, and where each tool wins.
Flexisip
linphone.org
Complete, modular and scalable SIP server, includes a push gateway, to deliver SIP incoming calls or text messages on mobile device platforms where push notifications are required to receive information when the app is not active in the foreground.
openSIPS
opensips.org
SIP proxy/server for voice, video, IM, presence and any other SIP extensions.
| Feature | Flexisip | openSIPS |
|---|---|---|
| Pricing | Free | Free |
| Model | Open-source | Open-source |
| License | CC-BY-SA-3.0 | CC-BY-SA-3.0 |
| Deployment | Self-hosted | Self-hosted |
| Category | Communication - SIP | Communication - SIP |
| Self-hosted | ✓Yes | ✓Yes |
| Free tier | ✓Yes | ✓Yes |
Pick Flexisip if…
- ✓You prefer Flexisip's feature set or ecosystem fit.
Pick openSIPS if…
- ✓You prefer openSIPS's feature set or ecosystem fit.