The best open source alternative to iCloud is Nextcloud. If that doesn't suit you, our users have ranked more than 100 alternatives to iCloud and many of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to iCloud are Proton Drive, Filen, ownCloud and Koofr.
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.
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.
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.
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.
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.
Choose simplicity, get Cozy. We all have a life and a digital life. Cozy gathers them. In your Cozy, you have all your personal data: pictures, health, bank, holidays, accessible only by you. Welcome to your new digital home.
kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.
Puter is a privacy-first personal cloud that houses all your files, apps, and games in one private and secure place, accessible from anywhere at any time.
Pydio is the mature alternative to Dropbox and Box.com, to build your own box, on your own servers.
Lightweight file storage with a Rust backend and optimized binary for efficiency, offering responsive UI on desktop and mobile, simple setup, multilingual English and Spanish support, no PHP dependency, and designed for minimal resource use on home servers.
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.
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