Looking to replace Nextcloud? These open source alternatives give you the same core workflow without the lock-in - free to use, often self-hostable, and auditable on GitHub. Compare licenses, languages and project activity, then switch on your own terms.
Immich is a high-performance, self-hosted photo and video management solution that keeps your entire library on your own server. It is built to back up, organize, browse, and search photos and videos without handing your memories to a third-party cloud.
Syncthing is a continuous file synchronization program that keeps files in sync between two or more computers in real time. It is decentralized by design: there is no central server that might be compromised, and none of your data is ever stored anywhere other than on your own devices.
Copyparty is a portable file server that turns almost any device into a place to share files over a local network or the internet, with resumable uploads and downloads from any web browser. Access is controlled with per-folder and per-user permissions plus temporary share links.
CasaOS is a personal cloud system that runs on home servers and turns spare hardware into a place to store and manage your own data, apps, and smart devices. It originated as the pre-installed system for the ZimaBoard.
Radicale is a small CalDAV and CardDAV server for sharing calendars, to-do lists, and contact lists. It supports events, todos, journal entries, and business cards, and exposes them through CalDAV, CardDAV, and HTTP.
Twake is a secure open source collaboration platform built to improve how organizations work together. It brings team chat, file storage, a shared team calendar, task management, video calls, and real-time document collaboration into a single digital workplace.
Rockstor is a network attached storage solution built on Linux and the BTRFS filesystem. It ships as a complete Linux distribution and runs as a DIY appliance on commodity PC, Pi 4, and ARM64 hardware.
