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.

BigBlueButton is an open-source web conferencing platform built for online learning. Whiteboard, breakout rooms, and live polls make classes feel real.

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.

A self-hosted chat application for teams and communities with video calls, voice calls, and screen sharing.

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

Collabora Online is a powerful open-source office suite built on LibreOffice. Edit documents, sheets, and slides together in self-hosted environments.

CryptPad is an end-to-end encrypted, zero-knowledge collaborative office suite. Write, edit, and share documents, sheets, and code without servers reading them.

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.

Element Call delivers end-to-end encrypted group video and voice calls built on the open Matrix protocol. No accounts, no tracking, fully self-hostable.

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

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

Focalboard is an open-source, self-hosted project management tool — a free alternative to Trello, Notion, and Asana for boards, docs, and team planning.

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.

Jitsi Meet is a free, secure, open-source video conferencing platform you can use in the browser or self-host. No account required to join any meeting.

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..