Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

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• Updated Nov 10, 2026
• Erlang

FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.

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• Updated Nov 9, 2026
• C

WebRTC plugin for Flutter Mobile/Desktop/Web

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• Updated Nov 11, 2026
• C++

Jitsi is an audio/video and chat communicator that supports protocols such as SIP, XMPP/Jabber, IRC and many other useful features.

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• Updated Nov 6, 2026
• Java

The official Asterisk Project repository.

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• Updated Nov 5, 2026
• C

RTSP/RTP/RTMP/FLV/HLS/MPEG-TS/MPEG-PS/MPEG-DASH/MP4/fMP4/MKV/WebM

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• Updated Oct 10, 2026
• C

🏆 Self-hosted, open-source WebRTC video conferencing platform for real-time communication and collaboration. A modern alternative to Zoom, Google Meet, Jitsi Meet, and Microsoft Teams, powered by scalable SFU architecture with Mediasoup.

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• Updated Nov 12, 2026
• JavaScript

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

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• Updated Nov 12, 2026
• C

PJSIP project

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• Updated Nov 12, 2026
• C

Baresip is a modular SIP User-Agent with audio and video support

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• Updated Nov 12, 2026
• C

A simple, intuitive, and powerful JavaScript signaling library

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• Updated Jun 15, 2026
• TypeScript

HOMER - 100% Open-Source SIP, VoIP, RTC Packet Capture & Monitoring

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• Updated Nov 11, 2026
• Go

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

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• Updated Nov 12, 2026
• C#

⚡ The future of programmable SIP servers.

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• Updated Nov 11, 2026
• TypeScript

Linphone.org mirror for linphone-android (https://gitlab.linphone.org/BC/public/linphone-android)

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• Updated Nov 9, 2026
• Kotlin

Ncurses SIP Messages flow viewer

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• Updated Nov 9, 2026
• C

SIP softphone for Mac

sip voip mac-app softphone phone-calls

• Updated Oct 13, 2026
• Swift

SIPVicious OSS is a VoIP security testing toolset. It helps security teams, QA and developers test SIP-based VoIP systems and applications. This toolset is useful in simulating VoIP hacking attacks against PBX systems especially through identification, scanning, extension enumeration and password cracking.

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• Updated Jul 10, 2026
• Python

Pluggable WebRTC softphone and communication platform.

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• Updated Mar 13, 2019
• JavaScript

A Go implementation of STUN

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• Updated Nov 12, 2026
• Go