The best open source alternative to Microsoft OneDrive is Nextcloud. If that doesn't suit you, our users have ranked more than 100 alternatives to Microsoft OneDrive and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Microsoft OneDrive are Syncthing, Filen, Proton Drive and ownCloud.
On-premises solution offering file sync, universal data access and collaboration through Nextcloud Files, Talk, and Groupware. Ensures secure, controlled data storage for enterprise with powerful privacy tools including encryption, fine-grained access, and a bug bounty.
Open-source, peer-to-peer service offering encrypted file synchronization, ensuring data privacy and user-autonomy without relying on cloud storage or central servers, suitable for various uses.
Filen is a cutting-edge cloud storage provider that offers client-side, end-to-end, zero-knowledge encryption. Headquartered and operated entirely in Germany, Filen is at the forefront of combining comprehensive features with uncompromising privacy and security.
Offering comprehensive privacy with end-to-end encryption, Proton Drive allows users to store, synchronize, and share files across various devices through web, desktop, and mobile apps. Free storage up to 5 GB, service remains open-source and audited, ensuring file content and access control.
Self-hosted option for secure file sync, sharing, calendars, contacts, and mail supporting mobile, desktop, web access and external storage, real-time collaboration, password-protected links, document editing, anti-virus scanning, and LDAP integration.
Koofr is a safe, secure and simple way to store, backup and share your documents, photos, videos and more. It offers up to 10 GB of free safe storage for your files with affordable upgrades and options to connect multiple cloud accounts.
End-to-end encrypted cloud storage with quantum-resistant cryptography protects files from all third-party access, including service providers, ensuring strict confidentiality for individuals and businesses, seamless web and mobile access, and compliance with EU data laws.
Open source cloud platform for organizations with self-hosting, device file synchronization, sharing, versioning, secure encrypted storage, admin controls, web access, audit logging, and support for desktop and mobile clients for secure collaboration.
kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.
IPFS is a global, versioned, peer-to-peer filesystem. It combines ideas from Git, BitTorrent, Kademlia, SFS, and the web. It is like a single bittorrent swarm, exchanging git objects. IPFS provides an interface as simple as the HTTP web, but with permanence built in.
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.
Lightweight, self-hosted encrypted cloud storage enabling fast uploads and downloads, easy Docker install, secure public link sharing, browser-side cryptography, searchable metadata, and low RAM footprint. Designed for privacy, performance, and file management.
Germany
EU
Sweden
Switzerland
United States
Slovenia
China
France
Croatia
Open source, so possibility of new features + bug fixes added with pull requests. Storage on your own terms, specify where these items are stored.