OpenSourceProjects

Open Source Microsoft Teams Alternatives

Discover 19 open source alternatives to Microsoft Teams. All free, community-driven, and actively maintained.

What is Microsoft Teams?

Microsoft Teams is a unified communication and collaboration platform for workplace messaging, video calls, and file sharing.

Visit Microsoft Teams

chat

chat

Instant messaging platform. Backend in Go. Clients: Swift iOS, Java Android, JS webapp, scriptable command line; chatbots

Chat Application

server

server

screen sharing for developers https://screego.net/

janus-gateway

janus-gateway

Janus WebRTC Server

mumble

mumble

Mumble is an open-source, low-latency, high quality voice chat software.

humhub

humhub

HumHub is an Open Source Enterprise Social Network. Easy to install, intuitive to use and extendable with countless freely available modules.

Enterprise Social Network

ejabberd

ejabberd

Robust, Ubiquitous and Massively Scalable Messaging Platform (XMPP, MQTT, SIP Server)

thelounge

thelounge

💬 ‎ Modern, responsive, cross-platform, self-hosted web IRC client

colanode

colanode

Open-source and local-first Slack and Notion alternative that puts you in control of your data

Chat Application

mirotalk

mirotalk

🚀 Self-hosted open-source WebRTC video conferencing platform built on peer-to-peer (P2P) architecture for fast, secure real-time communication with end-to-end privacy.

Video Conferencing

synapse

synapse

Synapse: Matrix homeserver written in Python/Twisted + Rust

tailchat

tailchat

Next generation noIM application in your own workspace, not only another Slack/Discord/Rocket.chat

Instant Messaging

weechat

weechat

The extensible chat client.

converse.js

converse.js

Web-based XMPP/Jabber chat written in JavaScript

jitsi-videobridge

jitsi-videobridge

Jitsi Videobridge is a WebRTC compatible video router or SFU that lets build highly scalable video conferencing infrastructure (i.e., up to hundreds of conferences per server).

Openfire

Openfire

An XMPP server licensed under the Open Source Apache License.

mirotalksfu

mirotalksfu

🏆 Self-hosted, open-source WebRTC video conferencing platform for real-time communication and collaboration. A modern alternative to Zoom, built on SFU architecture.

Video Conferencing

self-hosted

self-hosted

Deploy Stoat on your own infrastructure!

chitchatter

chitchatter

Secure peer-to-peer chat that is serverless, decentralized, and ephemeral

galene

galene

The Galène videoconference server

Video Conference