Open Source Team Collaboration Tools

On-premises file sync, universal access, integrated collaboration, real-time communication with privacy and data control focus.

Open-source suite for editing documents, spreadsheets, presentations, forms, and PDF files with co-editing modes, plugin support, AI assistant, and integration across 40+ platforms.

AppFlowy is an open source alternative to Notion. You are in charge of your data and customizations.

Stoat (previously Revolt) is a chat platform that puts users first. With text & voice channels, video calling, screen sharing, permissions, mod tools, bots & more. Join any community or build one just the way you like it. It also respects your privacy.

CryptPad is a private-by-design alternative to popular office tools and cloud services. All the content stored on CryptPad is encrypted before being sent, which means nobody can access your data unless you give them the keys.

End-to-end encrypted online spreadsheets enabling secure, real-time collaboration, access management, automatic calculations, and cross-device sharing for team data analysis.

Docmost is an open-source collaborative wiki and documentation software. It is an open-source alternative to Confluence and Notion.

Open source kanban platform with workspace members, board visibility controls, Trello import, card labelling, activity logs, and collaboration tools.

Docs in Proton Drive are end-to-end encrypted so your work stays safe from data breaches, online surveillance, and can never be fed into AI models.

Wekan, formerly LibreBoard, is an open-source and collaborative Trello -like kanban board application.

Habitica is a free habit building and productivity app that treats your real life like a game. With in-game rewards and punishments to motivate you and a strong social network to inspire you, Habitica can help you achieve your goals to become healthy, hard-working, and happy.

Mattermost is a secure, open source platform for communication, collaboration, and workflow orchestration across tools and teams.

Zulip is the only modern team chat app that is designed for both live and asynchronous conversations. Zulip topics create a separate space for each discussion, so different conversations will never get in each other's way.

Redmine is a flexible project management web application. Written using Ruby on Rails framework, it is cross-platform and cross-database.

Seafile is an open-source file management and collaboration platform that goes beyond sync and share, offering extensible metadata, multi-level tagging, flexible file views, and AI-powered organization for smarter teamwork.

Collaborative platform for real-time note-taking, documentation, and wikis, with offline support, granular permissions, AI tools, and multiple export formats.

Transform data with an open-source interface using relational databases and Python engines. Collaborate in real-time with custom permissions for security.

Rocket.Chat is a Web Chat Server, developed in JavaScript, using the Meteor fullstack framework.

Weblate is a web based translation tool with tight VCS integration. It features simple and clean user interface, propagation of translations across components, consistency checks and automatic linking to source files.

Open source software offering project timelines, issue tracking, and document management with robust security and flexible management options.

Open source project platform with kanban boards, timeline tracking, real-time team collaboration, automation, MIT licensing, and data encryption.

XWiki is the ultimate open-source structured wiki designed to enhance business collaboration and efficiency. Tailored for tech-savvy professionals, XWiki’s extensibility, customization, and flexibility make it indispensable for managing large projects and datasets, while...

Etherpad is a highly customizable Open Source online editor providing collaborative editing in really real-time.

Sync-in is a secure, open-source platform for file storage, synchronization, and team collaboration — designed to give organizations full control over their data and workflows, while remaining flexible enough for individual needs.

Open source tool for managing issues, tasks, and roadmaps with custom workflows, flexible Kanban, list, calendar views, analytics, imports, secure data, and integrations.