# kamailio/kamailio

Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms, focusing on flexibility, security and scalability

Repository: https://github.com/kamailio/kamailio
Canonical: https://ross.abutalabs.com/products/kamailio
Homepage: https://www.kamailio.org
Language: C
License: NOASSERTION
License Family: other
Topics: kamailio, sip, voip, webrtc, volte, iot, telephony
Last push: 2026-08-26T12:30:22+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 86, longevity 100
- inputs: {"age_days": 4648, "days_push": 7, "days_rel": 13, "gap_med": 47, "n_releases_24m": 12}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2928, forks 1124 (observed 2026-08-28T04:07:30.519653+00:00)

## What it is
Kamailio is an open source SIP signaling server (RFC3261) written in C, designed for large-scale VoIP and real-time communication platforms. It provides a modular architecture with 150+ modules supporting proxy, registrar, location, application server roles, plus WebRTC, IMS/VoLTE, TLS, and load balancing capabilities.

## Use cases
- run a scalable SIP proxy for thousands of calls per second
- build a VoIP platform with WebRTC WebSocket support
- deploy a SIP registrar and location service
- load balance SIP traffic across Asterisk or FreeSWITCH media servers
- implement least cost routing and failover for call routing
- add SIP authentication and TLS-secured signaling
- build an IMS/VoLTE core network component
- provide instant messaging and presence with SIMPLE and MSRP

## When to choose
- you need a high-performance, carrier-grade SIP server handling large call volumes
- you want flexible SIP routing, load balancing, and failover with a rich configuration language
- you need WebRTC-to-SIP gatewaying or VoLTE/IMS extensions
- you want a modular server extensible with embedded Lua, Python, Perl, or Ruby scripting

## When to avoid
- you need a media server for actual audio/video processing (Kamailio is signaling only)
- you want a SIP phone or back-to-back user agent
- you need a simple PBX out of the box rather than a programmable SIP engine
- you require a non-GPL license for your product

## Facets
- artifact type: application
- maturity: stable
- function: http-server, proxy, auth, routing, load-testing, websocket, security, monitoring, middleware
- domain: networking, self-hosted, security, iot
- platform: cross-platform, self-hosted, embedded
- tags: sip-server, voip, webrtc, volte, ims, sip-proxy, telephony, rtp, presence, instant-messaging, carrier-grade, sbc, load-balancer, registrar, real-time, messaging, linux, docker

## Member repositories
- kamailio/kamailio (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:30.519653+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T07:33:30.346864+00:00, confidence not recorded.
  - readme: https://github.com/kamailio/kamailio (fetched 2026-08-28T04:07:30.519653+00:00, sha 46898511084d)
  - homepage: https://www.kamailio.org (fetched 2026-08-29T09:48:50.444675+00:00, sha b0783b207e53)
  - site_page: https://www.kamailio.org/w/features (fetched 2026-08-29T09:48:50.453645+00:00, sha 098b8eba010a)
  - site_page: https://www.kamailio.org/w/documentation (fetched 2026-08-29T09:48:50.455762+00:00, sha aad075624538)
  - site_page: https://www.kamailio.org/docs/modules/stable (fetched 2026-08-29T09:48:50.457516+00:00, sha d2365f250f23)
  - site_page: https://www.kamailio.org/docs/modules/devel (fetched 2026-08-29T09:48:50.459528+00:00, sha 0ff7b2060361)
  - site_page: https://www.kamailio.org/wikidocs (fetched 2026-08-29T09:48:50.461325+00:00, sha a744aa80d288)
  - site_page: https://www.kamailio.org/w/info (fetched 2026-08-29T09:48:50.462940+00:00, sha ae45208af1ca)
- Data as of 2026-08-30T08:39:29.467469+00:00.