Uber is a car service startup valued at $18.2 billion that allows users to request black car, luxury, or economy car services through a mobile app. It has received over $1.2 billion in funding and has seen revenue double every 6 months, with over $1 billion in gross bookings in 2013. Founded in 2008, Uber launched in NYC and SF in 2010 but soon faced regulatory issues, and now competes with services like Lyft while continuing to expand its product offerings and global footprint exponentially.