Yeti-Switch

Full-featured IPBX solution built atop Asterisk with integrated Web administration interface and REST-ful API.

An open source PBX and telephony toolkit for building and running voice communication systems.

OpenSIPS is a GPL-licensed SIP server implementation for building and managing VoIP signaling infrastructure.

FusionPBX is a web-based multi-tenant PBX and VoIP server platform built on FreeSWITCH for business telephony, call center, voicemail, fax, and conferencing use cases.

Web-based open source GUI that controls and manages Asterisk.

Janus is an open source WebRTC server for building real-time communication applications.

FreeSWITCH is a software-defined telecom stack for voice-over-IP, SIP, SMS, and telecom app integrations.

Flexisip is a modular, scalable SIP server suite for routing calls, presence, conferencing, push notifications, and SIP trunking.

Universal communication platform which preserves the user's privacy and freedoms.

OpenWA is an open-source WhatsApp API gateway with a dashboard, REST API, and pluggable storage and cache backends.

Novu is an open-source communication infrastructure platform for sending and managing multi-channel notifications and agent conversations through a single API.

MiroTalk SFU is a self-hosted, open-source WebRTC video conferencing platform for real-time communication, collaboration, and streaming.