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
9 self-hosted Vonage Business Communications alternatives
Cloud-based business communications platform providing VoIP phone service, SMS/MMS messaging, video meetings, team messaging, and contact-center features. Includes PBX/call routing, conferencing, and integrations with CRM and other business systems.
Alternatives to Vonage Business Communications
#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
An open-source WebRTC SFU that routes media for scalable multiparty video conferencing; supports Colibri XMPP/REST control, DTLS/SRTP, and Prometheus metrics.
3.1k stars1k forksApache-2.0last commit Actively maintained
Self-hostable web video conferencing app built on LiveKit, with large-meeting performance, screen sharing, chat, recordings, and transcription features.
2.2k stars279 forksMITlast 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
#6
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
#8
Modular, PHP/JavaScript web GUI that configures and manages Asterisk PBX features, endpoints, and call routing for businesses and service providers.
Activity unknown
#9
OpenTalk is an open-source video conferencing platform offering GDPR-compliant SaaS and self-hosted deployments with features like recording, whiteboards, breakout rooms, polls and telephone dial-in.
Activity unknown
What replacing Vonage Business Communications 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. 6 of 9 shipped a commit in the last six months. Licences in this list: Apache-2.0, MIT, AGPL-3.0. In exchange you take on hosting, backups and updates yourself.
Browse everything in VoIP / SIP & PBX.
