Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)
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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.
WebRTC plugin for Flutter Mobile/Desktop/Web
The official Asterisk Project repository.
🏆 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.
Kamailio - The Open Source SIP Server for large VoIP and real-time communication platforms, focusing on flexibility, security and scalability
HOMER - 100% Open-Source SIP, VoIP, RTC Packet Capture & Monitoring
A WebRTC, SIP and VoIP library for C# and .NET. Designed for real-time communications apps.
⚡ The future of programmable SIP servers.
Ncurses SIP Messages flow viewer
SIP softphone for Mac
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.
Generic library for real-time communications with async IO support
Build AI phone agents on your own computer and test every change with an AI caller. Open source, runs free with no API keys, cents per call with your own keys. Imports Dialogflow CX.
Self-hosted API-first AI call center: AI talks, code controls the call. AI agents answer every call; humans take over without dropping it. Runs on FreeSWITCH with your SIP trunk and realtime model (OpenAI, Grok, Qwen, Doubao, or any compatible gateway).
Modern and flexible SIP/VoIP cli tool
A dart-lang version of the SIP UA stack.
IVOZ Provider - Multitenant solution for VoIP telephony providers
Protect your SIP Servers from bad actors at https://sentrypeer.org
Linphone.org mirror for flexisip (git://git.linphone.org/flexisip.git)
SIP swiss army knife
Erlang SIP
P-KISS-SBC - simple and stupid SIP/RTP SBC - AGPL v3 - Based on kamailio / RTP Engine
Fast SIP and SDP Parser