Pure Go implementation of the WebRTC API
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Mumble is an open-source, low-latency, high quality voice chat software.
The AI that answers the phone.
Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)
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.
Java wrapper for the popular chat & VOIP service: Discord https://discord.com
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
Modern XMPP ("Jabber") Chat Client using GTK/Vala
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.
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.
a list of awesome resources related to security and hacking of VoIP, WebRTC and VoLTE
Generic library for real-time communications with async IO support
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.
Highly optimized, extremely modular and very flexible XMPP/Jabber server
Let your AI agents call your phone over VoIP, and call them back. Your phone rings like a real call, even locked; a voice AI talks it through and returns the transcript. Self-hosted, open source, no phone numbers or Twilio.
IVOZ Provider - Multitenant solution for VoIP telephony providers