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.

Privacy-focused diagramming software supporting real-time collaboration, offline mode, and cloud storage without ads or registration.

Fully open-source, end-to-end encrypted notes with device-based security, secure sync, offline access, powerful editor, vault, backups, and exports.

Open-source workspace with full data ownership, offline access, multi-platform support, and deep customization through themes, plugins, and templates.

A free Git source code hosting service with the objective to give the open-source code that is running our world a safe and friendly home, and to ensure that code remains free and secure forever.

Instant messaging with text, voice, video calling, screen sharing, privacy controls, customizable permissions, moderation, bots, and open-source design.

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.

Open-source wiki and documentation platform featuring real-time collaborative editing, spaces, groups, robust permissions, commenting, page history, and fast full-text search.

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

Gamifies habits, dailies, and to-dos with customizable avatars, team quests, rewards, and collectibles while tracking progress visually on web and mobile.

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.

Threaded group chat with topics for live or async collaboration, open-source, supporting self-hosted or cloud use, suited for organized team discussions.

Open-source kanban board offering real-time collaboration, customizable labels, filtered views, cards, comments, member assignments, and self-hosting options.

Open-source editor for vector and interface designs with AI-powered creation, Figma file support, real-time peer-to-peer collaboration, code export, and advanced programmability.

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

kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.

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.

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.

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.

Manage complex projects with nested task breakdowns, multi-language support, XML storage, scheduling, and customizable printing via advanced formatting.

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

Open-source messaging platform with real-time group, direct, and private chats, file sharing, video conferencing, custom integrations, and self-hosting.