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.
Ente Locker is a secure vault for life’s essentials - your most important documents and credentials - protected with end-to-end encryption.
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.
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.
Cozy makes the personal cloud more accessible. Respectful of the user's privacy, Cozy simplifies daily tasks: synchronize and backup photos, automate bills downloading, manage expenses, etc. Flexible and easy to use, their Open Source platform allows users to create and...
Trustless collaboration platform with decentralized file-sharing, collaborative editing, cheap storage, privacy controls, onchain team and community access, website and blog publishing, open workflows, customizable spaces, and alternatives to traditional online suites.
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