FreeSWITCH is an open-source software-defined telecom stack for building VoIP and real-time communication services with SIP and WebRTC support.
5.1k stars1.8k forkslast commit Actively maintained
7 self-hosted Webex Calling alternatives
Cloud-based business phone system from Cisco Webex providing hosted VoIP calling with enterprise PBX features, PSTN connectivity, call routing, voicemail, number management and administrative controls; integrates with Webex collaboration apps.
Alternatives to Webex Calling
#2
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
FusionPBX is a domain-based, multi-tenant PBX and softswitch web UI for FreeSWITCH, supporting extensions, IVR, queues, voicemail, provisioning, and more.
1k stars783 forkslast commit Actively maintained
Scalable, modular XMPP/Jabber server written in Java supporting TCP, BOSH, WebSockets, federation, components, HTTP API and push notifications.
359 stars110 forksAGPL-3.0last commit Actively maintained
#5
Open-source, modular SIP server (proxy, presence, conference, B2BUA) with push gateway, ICE/STUN/TURN, MySQL/SQLite support; optimized for mobile and embedded systems.
187 stars83 forksAGPL-3.0last commit Actively maintained
Open-source, API-first platform for carrier-grade IP communications: VoIP, WebRTC, messaging, conferencing and programmable telephony microservices.
Activity unknown
#7
Modular, PHP/JavaScript web GUI that configures and manages Asterisk PBX features, endpoints, and call routing for businesses and service providers.
Activity unknown
What replacing Webex Calling actually involves
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. 5 of 7 shipped a commit in the last six months. Licences in this list: AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in VoIP / SIP & PBX.
