Open Source Collaboration & Communication Tools Projects

Straightforward realtime kanban boards for intuitive task tracking with dark mode and collaborative features.

Open-source knowledge base combining note-taking, whiteboard, and project planning in one workspace.

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

Open source AI-powered omnichannel customer service platform that combines live chat, ticketing, and team collaboration as an alternative to Slack, Zendesk, Intercom, and HubSpot.

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

Open source, local-first Slack and Notion alternative that puts you in control of your data with offline support and end-to-end encryption.

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

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

Decentralized private messenger using email infrastructure for secure, end-to-end encrypted communication.

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

Open-source Matrix client for secure, decentralized messaging, voice, and video — runs on your own server.

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

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

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

Open-source, self-hosted project management tool — a free alternative to Trello, Notion, and Asana.

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

All-in-one open source platform that combines project management, CRM, chat, HR, and wiki as an alternative to Linear, Jira, Slack, and Notion.

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

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

Lightweight, Google-searchable open source Slack and Discord alternative designed for online communities.

Self-hostable, Dockerized mail server bundle that combines Postfix, Dovecot, and a polished web UI — a Gmail and Microsoft 365 alternative for organisations.

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

A beautiful terminal email client built with Go and Bubble Tea. An open source alternative to Superhuman and Outlook for the command line.

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

Low-latency, open-source voice chat built for gaming — self-host your own server with no subscription required.