The best open source alternative to ownCloud is Nextcloud. If that doesn't suit you, our users have ranked more than 100 alternatives to ownCloud and loads of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to ownCloud are Filen, Proton Drive, Seafile and YunoHost.
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.
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.
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.
YunoHost is a Debian GNU/Linux based distribution packaged with free software that automates the installation of a personal web server. The purpose of YunoHost is to allow users to easily host their own web services by enabling a simple point-and-click web interface for...
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.
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...
kDrive is a Swiss online storage service that respects its users' privacy and makes storing, sharing & collaborating on files a breeze.
Pydio is the mature alternative to Dropbox and Box.com, to build your own box, on your own servers.
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.
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.
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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It’s a community-fork of ownCloud with all components being open source. :)