Open-source PBX and telephony toolkit for building communications applications; modular C-based engine with SIP, WebRTC, RTP, ARI/AMI APIs and hardware support.

3.5k stars1.3k forkslast commit Actively maintained

Cloud-based business phone and call center platform offering VoIP calling, IVR, call routing and queues, call recording and analytics, SMS/WhatsApp support, and integrations with CRM and helpdesk systems for sales and support teams.
Open-source PBX and telephony toolkit for building communications applications; modular C-based engine with SIP, WebRTC, RTP, ARI/AMI APIs and hardware support.

3.5k stars1.3k forkslast commit Actively maintained
Modular, PHP/JavaScript web GUI that configures and manages Asterisk PBX features, endpoints, and call routing for businesses and service providers.

Activity unknown
Open-source, API-first platform for carrier-grade IP communications: VoIP, WebRTC, messaging, conferencing and programmable telephony microservices.

Activity unknown
Every option on this page is open source and free to run on your own hardware, so you own the data and there is no subscription to cancel. 1 of 3 shipped a commit in the last six months. In exchange you take on hosting, backups and updates yourself.
Browse everything in VoIP / SIP & PBX.