Daniel Ek

CEO, Cofounder, Spotify

When it launched in the U.S. in 2011, Swedish-born Daniel Ek's Spotify was available in six countries. Now it's in 55, and boasts 24 million active users and 6 million paying subscribers. It's paid out more than $1 billion in revenue to rights holders of the 20 million or so songs available through the streaming service.