Open-source, self-hosted messaging platform for secure team collaboration with real-time chat, audio calls, screen sharing, and integrations.
38.9k stars8.9k forkslast commit Actively maintained
13 self-hosted RingCentral alternatives
Cloud communications platform offering business VoIP/cloud PBX, team messaging, video conferencing, and contact-center features, plus integrations and administration tools for enterprise telephony and collaboration.
Alternatives to RingCentral
#2
Mumble is an open-source, low-latency VoIP voice chat platform with a desktop client and a self-hosted server for encrypted group communication.
8.2k stars1.4k forkslast commit Actively maintained
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
#4
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
Self-hosted Nextcloud Talk combines chat, video calls and webinars into one secure collaboration app.
2.2k stars574 forksAGPL-3.0last 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
#10
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
#12
Modular, PHP/JavaScript web GUI that configures and manages Asterisk PBX features, endpoints, and call routing for businesses and service providers.
Activity unknown
#13
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 RingCentral 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. 10 of 13 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.
