Open Source Microsoft OneDrive Alternatives

Puter is a browser-based desktop environment that works like a personal cloud computer. You get a full graphical interface with a file system, built-in apps, and persistent storage, all without installing anything locally. It's aimed at anyone who wants a consistent working environment accessible from any device.

The experience mirrors a traditional desktop OS. You can open, move, and organize files, launch apps, and manage your workspace through a familiar windowed interface. Everything lives in the cloud, so your files and settings follow you across sessions and devices.

Authentication supports Google, Microsoft, and Apple sign-in alongside standard email and password login. Two-factor authentication is available with an authenticator app, plus recovery codes as a fallback.

What sets Puter apart is the scope of what it tries to be: not just cloud storage or a remote desktop wrapper, but a self-contained operating environment running entirely in the browser. It's self-hostable, which means organizations or individuals can run their own instance rather than depending on the hosted service.

The target audience is broad. Casual users get a free, accessible workspace. Developers and teams who want control over their environment can self-host and extend it. Anyone who's frustrated by device-specific setups or wants their desktop accessible from a borrowed machine has a practical use case here.

Important: Development paused due to funding constraints (source).

Spacedrive revolutionizes file management by creating a virtual distributed filesystem across all your devices. This open-source application offers a unified interface to access, organize, and manage your files, regardless of their physical location.

Key benefits of Spacedrive include:

• Unified Access: Connect and browse files from multiple devices and cloud services in one place.
• Smart Organization: Utilize powerful tagging, categorization, and search features to keep your digital life in order.
• Cross-Platform Compatibility: Seamlessly work across Windows, macOS, Linux, iOS, and Android.
• Privacy-Focused: Your data remains under your control, with optional end-to-end encryption.
• Customizable: Tailor the interface and workflows to suit your specific needs.
• Offline Capabilities: Access your virtual filesystem even without an internet connection.
• Media Management: Enjoy built-in media viewing and playback features.
• Version Control: Keep track of file changes and revert when needed.
• Extensible: Enhance functionality with a growing ecosystem of plugins and integrations.

Spacedrive empowers you to take control of your digital assets, providing a seamless experience across all your devices and storage solutions. Whether you're a creative professional managing large media libraries, a developer organizing code repositories, or simply someone looking to declutter their digital life, Spacedrive offers the tools you need to create a more efficient and organized digital workspace.

Nextcloud is an open source, self-hosted file sync and share platform that allows organizations to store, share and collaborate on files securely.

Key features include:

• File sync and sharing across devices
• Real-time document collaboration
• Video calls and chat
• Calendar, contacts and email integration
• Advanced security and access control
• On-premises hosting for full data control
• Customizable and extensible through apps

Nextcloud is designed for organizations that need secure file sharing and collaboration while maintaining control over their data. It can be deployed on-premises or with a trusted cloud provider.

Some key benefits of Nextcloud:

• Improved productivity through integrated collaboration tools
• Enhanced security with end-to-end encryption and granular permissions
• Compliance with data protection regulations like GDPR
• Lower costs compared to proprietary cloud solutions
• Flexibility to customize and extend functionality

Nextcloud is used by thousands of organizations worldwide, including major enterprises, educational institutions and government agencies. It provides a powerful yet easy-to-use platform for secure content collaboration.

Ente is a revolutionary cloud storage platform designed for those who value privacy and security in the digital age. With a focus on protecting your precious memories, Ente offers end-to-end encryption for all your photos and videos, ensuring that only you have access to your personal content.

Key benefits of Ente include:

• Uncompromising Security: Your data is encrypted on your device before being uploaded, making it impossible for anyone, including Ente, to access your files without your permission.

• Cross-Device Syncing: Seamlessly access your photos and videos across all your devices, with real-time updates and automatic backups.

• User-Friendly Interface: Enjoy a clean, intuitive design that makes organizing and sharing your media effortless.

• Sharing with Confidence: Share albums or individual photos securely with friends and family, maintaining control over who can view your content.

• Open Source Transparency: Ente's commitment to privacy is backed by its open-source nature, allowing for community verification of security practices.

• Affordable Plans: Choose from flexible storage options that cater to your needs without breaking the bank.

• No Ads or Data Mining: Your personal information is never sold or used for targeted advertising.

Experience the peace of mind that comes with knowing your digital memories are safe, accessible, and under your control with Ente.

Filestash is a versatile, open-source file management solution designed for enterprises. It offers a unified interface to access and manage files across various storage backends, including S3, SFTP, FTP, WebDAV, Samba, and many more.

Key features include:

1. Universal File Manager: Browse, organize, and share files across multiple storage solutions through a single intuitive interface.

2. SSO Integration: Seamlessly integrates with corporate SSO systems like LDAP, SAML, and OIDC for secure and familiar authentication.

3. White-Label Solution: Customize Filestash's appearance to match your company branding and deploy it as your own solution.

4. Extendable Architecture: Utilize plugins to extend functionality and adapt to specific business needs. Custom plugin development is available for specialized requirements.

5. Security & Compliance: Maintain high security standards with activity logs and audit trails, allowing you to monitor user actions and protect confidential data.

6. Wide Range of Supported Backends: Compatible with popular storage solutions like S3, SFTP, FTP, WebDAV, Samba, Minio, Azure Blob, Git, and many others.

7. Enterprise-Ready: Trusted by notable organizations including MIT, DHL, Schneider Electric, and others.

Filestash offers both an open-source version for self-deployment and an enterprise version with additional features and support. It's an ideal solution for businesses looking to streamline file management across diverse storage systems while maintaining security and compliance.

Transform how you organize and collaborate on files with this powerful self-hosted solution that goes beyond traditional file syncing. Built for teams who need complete control over their data while maintaining seamless collaboration.

Key advantages:

• AI-powered file organization - Automatically generate descriptions, tags, and extract key information from your files
• Custom file properties - Add metadata like owner, status, and security level to make files easily searchable and filterable
• Flexible viewing options - Create table, gallery, kanban, and map views based on your file properties
• Real-time collaboration - Built-in document editor (SeaDoc) with co-editing, revision tracking, and review workflows
• Granular permissions - Control access at folder and sub-folder levels with read/write, read-only, and preview permissions
• Enterprise security - Advanced encryption, comprehensive audit logs, and file history recovery
• Multi-level tagging - Organize tags in hierarchical structures for better categorization

Perfect for teams seeking:

• Complete data ownership and privacy
• Advanced file organization capabilities
• Seamless collaboration without vendor lock-in
• Enterprise-grade security and compliance features

Trusted by over 1 million users worldwide, this solution offers the perfect balance of powerful features and data sovereignty.

OpenCloud is a file management and collaboration platform built for organizations that need full control over their data. It's developed by the Heinlein Group, a Berlin-based open source IT company with three decades of experience. The platform targets public sector bodies, research institutions, educational organizations, and businesses that can't afford to hand their data to a third-party cloud provider.

At its core, OpenCloud handles what tools like Nextcloud or Seafile also tackle: storing, syncing, and sharing files across teams. What sets it apart is its cloud-native architecture designed for high data volumes and large user counts, combined with a strong emphasis on GDPR compliance and zero-trust security principles.

Key capabilities include:

• Integrated office suite for real-time document collaboration without switching tools
• Encryption and secure versioning that protects against ransomware
• Two-factor authentication and flexible access rights management
• On-premise or SaaS deployment through selected partners, depending on your infrastructure needs
• Mobile accessibility with a barrier-free interface suited for distributed teams

For IT administrators, the platform is designed to slot into existing infrastructure without heavy customization. Installation is straightforward, and the system handles growing teams without performance degradation.

OpenCloud sits in the same cloud file sync and share space as Dropbox alternatives, but with a self-hostable model that keeps data under your organization's control. The zero-trust approach means access is verified continuously, not just at login. That makes it a practical fit for regulated industries or public institutions where data residency requirements are non-negotiable.

Papra is an open-source document management solution that brings order to digital chaos. With features like automated email attachment ingestion and intelligent document tagging, it streamlines how you organize and access your files.

Key benefits include:

• Centralized document storage - Keep all your files in one secure location instead of scattered across platforms
• Smart email integration - Forward emails to a unique address and automatically save attachments
• Powerful search capabilities - Find any document instantly with advanced search functionality
• Flexible organization - Use tags to create a customized filing system that works for your needs

Whether you're an individual looking to organize personal documents or a business seeking to improve document workflows, Papra provides the tools to make document management effortless and efficient.

Sync-in is an open-source file storage and collaboration platform that puts you in complete control of your data. Unlike traditional cloud services, you host everything on your own infrastructure, ensuring data sovereignty and compliance with regulatory requirements.

Key features include:

• Real-time collaborative editing with Collabora Online and OnlyOffice integration
• Advanced file synchronization across Windows, macOS, and Linux devices
• Collaborative spaces for team organization with granular permissions
• Smart search with full-text content indexing across document types
• Secure sharing with customizable access controls and expiration dates
• WebDAV integration for seamless file explorer mounting

The platform combines security by design with modern performance, offering a scalable architecture suitable for individual users to enterprise deployments. Built with transparency at its core, Sync-in benefits from continuous community contributions while maintaining the highest security standards.

Whether you need to collaborate with external partners through the guest system, manage complex file workflows, or ensure regulatory compliance, Sync-in provides a powerful alternative to proprietary cloud storage solutions without compromising on functionality or user experience.

Secure your professional data with an open source encrypted storage solution that puts privacy first. Store, share, and collaborate on files with complete control over your data through on-premises deployment options.

Key features include:

• End-to-end encryption for maximum security with unique keys for each file
• Shared Drive functionality for seamless team collaboration
• Built-in office suite with OnlyOffice integration for creating documents, presentations, and spreadsheets
• Advanced search capabilities to quickly find files by content, name, or sender
• Flexible access controls with public or protected link sharing
• Self-hosted deployment to maintain complete data sovereignty

Perfect for businesses seeking privacy-focused file storage without compromising on functionality. The platform combines enterprise-grade security with an intuitive interface, making it easy for teams of any size to collaborate while keeping sensitive data protected. Built by LINAGORA, a leader in European open source solutions.

Firefiles revolutionizes cloud storage management by offering a unified platform for all your storage needs. Here's what makes Firefiles stand out:

1. Multi-Provider Support: Seamlessly integrate with popular cloud storage providers like Firebase, AWS, Digital Ocean, Backblaze, and more.

2. Open Source: Fully open-sourced on GitHub, ensuring transparency and community-driven development.

3. Enhanced Security: Offers superior security and privacy compared to traditional cloud storage solutions.

4. User-Friendly Interface:

   • Intuitive dashboard for managing multiple drives
   • Light and dark UI themes
   • File preview functionality directly in the browser

5. Efficient File Management:

   • Easy simultaneous upload of multiple files
   • Quick downloads with a single click
   • File preview without downloading

6. Customizable: Set up your cloud drive with the backend of your choice.

7. Team Collaboration: Invite team members to your cloud drives (coming soon).

8. Cross-Platform: Available for MacOS, Windows, and Linux.

Firefiles is designed to be the last cloud storage solution you'll ever need, combining the flexibility of multiple providers with the simplicity of a single, user-friendly interface. Whether you're an individual user or part of a team, Firefiles offers a seamless experience for all your file storage and management needs.

Vanguard is a powerful, community-driven backup solution designed to protect your critical data with ease and flexibility. Whether you're managing servers, databases, or applications, Vanguard has you covered.

Key Features:

• End-to-end encryption ensures your backups remain secure
• Multi-database support for MySQL and PostgreSQL
• Flexible scheduling to fit your specific backup needs
• Mobile app for on-the-go backup management (Android available)

How It Works:

1. Connect Vanguard to your servers securely via SSH
2. Configure backup sources (databases, files) and destinations
3. Set up automated schedules or use cron for precise timing
4. Monitor backups through an intuitive dashboard or mobile app

Deployment Options:

• Self-host Vanguard for complete control
• Try the cloud-hosted version for quick setup

Vanguard empowers you to take charge of your data protection strategy. With its open-source nature, you benefit from continuous community improvements and the flexibility to adapt the solution to your unique needs.