That's just the logo. Looking at their legal documents is just Uber Technologies Inc.
http://newsroom.uber.com/wp-content/uploads/2015/04/FormRule...
Re:Google launches Uber rival RideWith
by freehunter on Tuesday July 07, 2015 @09:34AM
(#9845296)
Everything on their home page is in all-caps, not just the word Uber. If you look at press releases, their social media accounts, their emails, anything other than their all-caps homepage, it's shown as Uber.
Though they do use lowercase in some minor text. Still easy enough to make the mistake, though.