# sipsorcery-org/sipsorcery

A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.

Repository: https://github.com/sipsorcery-org/sipsorcery
Canonical: https://ross.abutalabs.com/products/sipsorcery
Homepage: https://sipsorcery-org.github.io/sipsorcery
Language: C#
License: NOASSERTION
License Family: other
Topics: voip, sip, webrtc, rtp, stun, sdp, csharp, dotnet, ice, video-calls, communications
Last push: 2026-08-26T17:17:50+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": 3961, "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 1930, forks 528 (observed 2026-08-28T04:05:56.055095+00:00)

## What it is
SIPSorcery is a C#/.NET library implementing SIP, WebRTC, RTP, ICE, STUN and SDP for building real-time communication applications. It is platform-agnostic with separate media libraries for audio/video device access and codec support.

## Use cases
- add SIP calling to a .NET application
- implement WebRTC peer connections in C#
- build a softphone with audio and video calls
- stream RTP audio/video between endpoints
- handle SIP call transfers, hold and advanced call control
- build cross-platform VoIP apps with .NET Standard

## When to choose
- you need SIP or WebRTC protocol support in a C#/.NET app
- you want a managed, platform-agnostic real-time communications stack
- you need fine-grained control over RTP sessions and SDP negotiation

## When to avoid
- you need a turnkey hosted communications service rather than a library
- your project cannot accept the custom BSD-3-Clause license with its use restrictions
- you need built-in audio/video capture without adding platform-specific media packages

## Facets
- artifact type: library
- maturity: active
- function: websocket, networking, audio-processing, video-processing, sdk
- domain: networking, cross-platform, developer-tools
- platform: cross-platform, dotnet, windows, c
- tags: voip, sip, webrtc, rtp, sdp, stun, ice, real-time-communications, video-calls, csharp, real-time, linux, macos

## Member repositories
- sipsorcery-org/sipsorcery (main) score 77

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:05:56.055095+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 2026-08-30T03:08:48.295167+00:00, confidence not recorded.
  - readme: https://github.com/sipsorcery-org/sipsorcery (fetched 2026-08-28T04:05:56.055095+00:00, sha 668d33ab83ca)
  - homepage: https://sipsorcery-org.github.io/sipsorcery (fetched 2026-08-29T10:48:18.559415+00:00, sha 6b6fb746fe5f)
- Data as of 2026-08-30T08:39:29.467469+00:00.