Ubuntu One is an OpenID-based single sign-on service operated by Canonical Ltd. to allow users to log onto many Canonical-owned Web sites.

The Ubuntu One service was similar to Microsoft OneDrive, iCloud, Dropbox, Google Play Music, Amazon Cloud Player.

[8] Ubuntu One offered automatic upload of photos taken from Android mobile devices for immediate synchronization across computers; integration with Mozilla Thunderbird for contacts and with Tomboy for notes due to the access to the local CouchDB instance.

Ubuntu One published APIs for developers wishing to build applications with file and data synchronization or music streaming.

File services would be unavailable from June 1, but existing users were allowed to download their content until July 31, when all stored data would be permanently deleted.

"[4] The company also announced plans to release the source code for the Ubuntu One server software to the public under an open-source license.

The shutdown of cloud storage and synchronization services does not affect the single sign-on function of Ubuntu One, which will remain in place.