Mosso(The Rackspace Cloud) is a web application hosting/cloud platform provider ("Cloud Sites") that bills on a utility computing basis.
It has since branched out into cloud storage ("Cloud Files"). It was one of the first commercial cloud computing services.
The Rackspace Cloud was originally launched as Mosso LLC on March 4, 2006, a wholly owned subsidiary startup billed as a utility computing offering. As it pre-dated mainstream adoption of cloud computing it was "retooled" and relaunched on February 19, 2008, adopting the tagline "Mosso: The Hosting Cloud". The "Mosso" branding (including the mosso.com domain) was then dropped on June 17, 2009 in favour of "The Rackspace Cloud" branding (including the rackspacecloud.com domain). Since then, customer contracts have been executed with Rackspace US, Inc. d/b/a The Rackspace Cloud rather than with the Mosso LLC subsidiary.
Other companies (such as EMC with its "Decho" subsidiary) also use alternative branding for their cloud computing offerings.
In 2011, the "Rackspace Cloud" brand merged with Rackspace.com.