Open Source Collaboration & Communication Software
Collaboration & Communication software provides shared environments for real-time messaging, video conferencing, and joint document editing. These tools centralize team chat history, project notes, and digital whiteboards to prevent information from being scattered across different platforms. This type of software serves organizations and teams that need to manage internal discussions and shared knowledge bases. Self-hosting these apps ensures that sensitive company conversations and private project files remain on internal servers rather than on external corporate clouds.
This page lists 94 open source tools in the Collaboration & Communication category. The most popular are Excalidraw, AppFlowy and Affine. Most use the AGPL-3.0 or Apache-2.0 license, and 74 offer an official Docker image.
ejabberd
Realtime communication platform providing XMPP server, MQTT broker, and SIP service capabilities for scalable messaging.
HumHub
A modular social networking platform for creating intranets, knowledge databases, and internal communication hubs for organizations.
Flat
A virtual classroom client providing real-time video, audio, and interactive whiteboard capabilities for online education.
The Lounge
A self-hosted web IRC client that remains connected to servers while the user is offline.
Livebook
Interactive and collaborative code notebooks for automating data workflows and documenting Elixir projects with rich visualizations.
Workadventure
Create customizable virtual worlds for remote teams to interact via avatars and proximity based video chat systems.
Colanode
A local-first collaboration workspace combining real-time chat, rich text pages, databases, and file management for teams.
Expensify
Automate expense reporting, reimbursements, and corporate card management with real-time data synchronization and various third party integrations.
Teams for Linux
An unofficial desktop wrapper for Microsoft Teams that provides native system integration for Linux users.
Radicale
A lightweight server for syncing calendars, to-do lists, and contact lists using CalDAV and CardDAV protocols.
Franz
Consolidate multiple messaging and email services into a single desktop window to reduce application switching.
MiroTalk P2P
Self-hosted video conferencing platform using peer-to-peer WebRTC connections for secure real-time communication and collaboration.
Synapse
A homeserver implementation for the Matrix open standard for secure and interoperable real-time communications.
Campfire
A self-hosted group chat system featuring multiple rooms, direct messaging, file attachments, and bot integration via API.
Cinny
A secure and modern Matrix client providing an encrypted interface for decentralized instant messaging conversations.
Legcord
A standalone desktop client for Discord that integrates privacy protections and custom modification frameworks.
WeeChat
A lightweight and extensible chat client supporting multiple protocols and customizable through various scripting languages.
Ergo
A modern IRC server that integrates daemon, services framework, and bouncer functionality into one application.
Converse
A client side XMPP chat application that runs in web browsers or as a desktop app.
Baïkal
A lightweight CalDAV and CardDAV server for hosting personal calendars and contact address books.
Stoat
Self-hostable group chat with servers, channels, voice, and moderation tools built under EU privacy law.
Jitsi Videobridge
A WebRTC compatible selective forwarding unit that routes multimedia traffic for scalable video conferencing infrastructure.
MiroTalk SFU
Self-hosted video conferencing platform for real-time communication and collaboration using a scalable SFU architecture.
Openfire
A real time collaboration server using the XMPP open protocol for instant messaging and communication.
OpenStreetMap
A Ruby on Rails application providing the web interface and API for a collaborative world map.
Quiet
A peer-to-peer team chat that syncs messages directly between devices over Tor without central servers.
WBO
A collaborative whiteboard for simultaneous drawing and real time state persistence on a large virtual board.
Loomio
Collaborative decision making tool designed for organizations to reach consensus and manage group discussions.
Stoat
A self-hosted communication platform featuring a back-end, web front-end, file server, and image proxy.
Wire
Provides end to end encrypted messaging, file sharing, and video calls for secure team communication and collaboration.
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