OpenCloud is a secure, open-source file sharing and collaboration platform designed for organizations prioritizing data sovereignty, security, and efficient team workflows.

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🚀 Overview

OpenCloud, developed by the Berlin-based Heinlein Group, is an open-source platform for intelligent file management, secure sharing, and real-time collaboration. It turns unstructured files into structured, long-term usable resources through community-driven open-source development and advanced features like versioning and access controls.

This project solves the challenges of data sovereignty, security risks in proprietary clouds, and inefficient collaboration by providing a GDPR-compliant, zero-trust solution that's easy to integrate, scalable, and fully controllable. It's built for public authorities, businesses, research institutions, educational organizations, and teams needing sovereign alternatives to services like Nextcloud or SharePoint.

Heinlein Group created OpenCloud drawing on 30 years of open-source and Linux expertise to promote 100% digital sovereignty for companies, public institutions, and individuals, ensuring performance, security, and flexibility in a cloud-native architecture.

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✨ Key Features

• Secure file management and sharing with encryption, ransomware-resistant versioning, flexible access rights, and 2FA (ensures enterprise-grade protection and GDPR compliance)
• Real-time collaboration using integrated Collabora Online office suite, team spaces, and roles for seamless workflow management
• Cross-platform access via web client, desktop sync client, and native iOS/Android mobile apps (enables anytime, anywhere productivity)
• Optional: Experimental Docker Compose deployments and ongoing scalability improvements

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🛠 Tech Stack

• Frontend: PHP, JavaScript
• Backend: Golang
• Database: None (uses filesystem storage, default $HOME/.opencloud/)
• Auth: OpenID Connect (e.g., Keycloak, LibreGraph Connect)
• Hosting: Docker Compose, self-hosted on Linux/Ubuntu

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👥 Who Is This For?

This project is useful for:

• Public authorities who want fully GDPR-compliant, barrier-free file sharing
• Businesses seeking flexible data rooms and team collaboration tools
• Research/educational teams needing scalable, cloud-native, mobile-accessible storage

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📸 Screenshots / Demo

• Live demo: https://demo.opencloud.eu (if available; otherwise self-host via docs)
• GitHub: https://github.com/opencloud-eu/opencloud

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🔥 Project Status

• 🟢 Actively building

Last updated: 2026-03-24

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❓ FAQ

Is this project free?

Yes / Open Source (Apache-2.0). On-premise self-hosting is free; SaaS via partners. (Explain briefly.)

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Is the source code available?

Yes — https://github.com/opencloud-eu/opencloud

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Can I contribute?

Report bugs/issues, request features, write docs/code/tests, review PRs, help community. See CONTRIBUTING.md for details.

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📬 Contact & Links

• Website: https://opencloud.eu
• GitHub: https://github.com/opencloud-eu
• Twitter/X: N/A (mentions on X, no official)
• Email: security@opencloud.eu

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