Open Source Collaboration & Communication Tools Projects

Open-source real-time collaborative text editor you can self-host.

Open-source video conferencing platform — free, secure, and self-hostable.

Self-hosted office suite with real-time collaboration.

End-to-end encrypted collaborative office suite with zero-knowledge privacy.

Decentralized social network server that federates with the broader Fediverse — run your own instance instead of relying on Twitter/X.

End-to-end encrypted group video calling built on the Matrix open protocol.

Wiki.js | A modern and powerful wiki app built on Node.js

Modern, lightweight self-hosted music server compatible with Subsonic/Airsonic clients — stream your music everywhere.

Open-source virtual whiteboard for creating hand-drawn style diagrams and sketches.

Open-source team chat with a unique topic-based threading model that makes it easy to follow multiple conversations.

Simple, open source team messaging platform

Federated link aggregator and community discussion platform — a decentralized, self-hostable alternative to Reddit.

Free and open-source media server for movies, TV shows, music, and photos — a fully self-hosted alternative to Plex.

Federated, decentralized video hosting platform built on ActivityPub.

The communications platform that puts data protection first.

Hierarchical personal knowledge base with powerful note-taking, rich text editing, and scripting capabilities.

Open-source scheduling infrastructure — a self-hostable alternative to Calendly for booking meetings and appointments.

Open-source survey and experience management platform for product and customer research.

Open-source virtual classroom platform built for online education and webinars.

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

The most popular self-hosted cloud platform for file storage, collaboration, and communication.

A platform for community discussion. Free, open, simple.

Open-source LibreOffice-powered collaborative office suite for self-hosted environments.

Self-hosted live video streaming server with built-in chat and Fediverse integration.