Think of Lyft as on-demand ridesharing and an affordable alternative to a cab. "It's your friend with a car on demand," says John Zimmer, co-founder of the San Francisco startup. A spinoff from Zimride, the largest ridesharing service in the nation, Lyft is a mobile app that uses real-time location data on your phone to let you find a background-checked driver in your area in minutes. The 3-month-old service now has 200 drivers in San Francisco.
Oracle's Safra Catz tops the list again this year, raking in $51 million in total compensation. See who else took home the big bucks.