ownCloud is a free and open-source software project for content collaboration, file-sharing, and file-syncing.

The ownCloud project was launched in 2010 by Frank Karlitschek,[7][8][9] who shortly afterward founded the company of the same name together with Markus Rex and Holger Dyroff.

ownCloud users can manage calendars (CalDAV), contacts (CardDAV), scheduled tasks and streaming media (Ampache) from within the platform.

Furthermore, users can interact with the browser-based ODF-format word processor,[14] bookmarking service, URL shortening suite, gallery, RSS feed reader and document viewer tools from within ownCloud.

Commercial features include end-to-end encryption, ransomware and antivirus protection, branding, document classification, and single sign-on via OpenID.