# OpenSIPS/opensips

OpenSIPS is a GPL implementation of a multi-functionality SIP Server that targets to deliver a high-level technical solution (performance, security and quality) to be used in professional SIP server platforms.

Repository: https://github.com/OpenSIPS/opensips
Canonical: https://ross.abutalabs.com/products/opensips
Homepage: https://opensips.org
Language: C
License: NOASSERTION
License Family: other
Last push: 2026-08-26T11:07:44+00:00

## Health v2 (maintenance only)
Score: 77/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 99, release rhythm 35, longevity 100
- inputs: {"age_days": 4864, "days_push": 7, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_releases, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 1516, forks 672 (observed 2026-08-28T04:04:56.660313+00:00)

## What it is
OpenSIPS is a GPL-licensed, open-source SIP server/proxy implementation written in C, forked from the SER project. It provides carrier-grade SIP signaling for voice, video, IM, and presence services, with a modular architecture of 120+ modules and a flexible routing scripting language.

## Use cases
- run a SIP proxy or registrar for a VoIP platform
- build a Class 4/5 residential or wholesale trunking platform
- deploy a session border controller (SBC)
- load balance SIP traffic across media or app servers
- implement least-cost routing and failover for calls
- set up a virtual PBX or enterprise telephony backend
- handle NAT traversal for SIP and RTP traffic
- build a presence or IM signaling server

## When to choose
- you need a high-throughput, carrier-grade SIP server (tens of thousands of calls per second)
- you want flexible, scriptable SIP routing logic with many integration modules
- you are building telecom/ITSP infrastructure like trunking, SBCs, or PBX front-ends
- you need support for UDP/TCP/TLS/SCTP transports, IPv4/IPv6, and AAA via RADIUS/DIAMETER

## When to avoid
- you need a simple end-user softphone or PBX GUI rather than a signaling server
- your project is small-scale and a simpler PBX like Asterisk or FreeSWITCH media handling suffices
- you are not comfortable writing SIP routing scripts or managing telecom infrastructure
- you need WebRTC media processing out of the box without additional components

## Facets
- artifact type: service
- maturity: stable
- function: http-server, routing, middleware, auth, load-testing, monitoring
- domain: networking, self-hosted, backend
- platform: cross-platform, c
- tags: sip-server, voip, telephony, sip-proxy, carrier-grade, rtp, presence, load-balancer, session-border-controller, telecom, linux

## Member repositories
- OpenSIPS/opensips (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:04:56.660313+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 2026-08-30T04:32:05.202282+00:00, confidence not recorded.
  - readme: https://github.com/OpenSIPS/opensips (fetched 2026-08-28T04:04:56.660313+00:00, sha 61a67f56cbfc)
  - homepage: https://opensips.org (fetched 2026-08-29T11:35:41.292366+00:00, sha 291d6791b193)
  - site_page: https://www.opensips.org/Documentation/Manual (fetched 2026-08-29T11:35:41.315018+00:00, sha 886cf44034c2)
  - site_page: https://opensips.org/About/About (fetched 2026-08-29T11:35:41.301514+00:00, sha da73c5da1b57)
  - site_page: https://opensips.org/Documentation/Manuals (fetched 2026-08-29T11:35:41.304149+00:00, sha 886cf44034c2)
  - site_page: https://blog.opensips.org/2026/07/28/the-re-design-of-the-opensips-documentation (fetched 2026-08-29T11:35:41.306492+00:00, sha 804aedb22624)
  - site_page: https://www.opensips.org/About/Version-Overview-4-0-0 (fetched 2026-08-29T11:35:41.308555+00:00, sha 021c4dc7dd41)
  - site_page: https://www.opensips.org/About/WhoIsUsing (fetched 2026-08-29T11:35:41.310477+00:00, sha 985dbc152b67)
  - site_page: https://www.opensips.org/About/Features (fetched 2026-08-29T11:35:41.312045+00:00, sha 494e2fbd4a0b)
  - site_page: https://www.opensips.org/About/PerformanceTests (fetched 2026-08-29T11:35:41.313538+00:00, sha e597df47d7ee)
- Data as of 2026-08-30T08:39:29.467469+00:00.