Top 10 Most Successful American Entrepreneurs Under 30

Drew Houston (29): Founded Dropbox, a file hosting service.

Ben Silbermann (29): Co-founded Pinterest, a social media platform for sharing images.

Adam D'Angelo (29): Co-founded Quora, a question-and-answer website.

Pete Cashmore (28): Founded Mashable, a news and entertainment website.

Trip Adler (29): Founded Blippar, an augmented reality platform.

Ryan Allis (28): Co-founded Fiverr, a marketplace for freelance services.

Alexa von Tobel (28): Founded LearnVest, a financial planning website.

Ben Kaufman (27): Founded Quirky, a crowdsourced product development company.

Cameron Johnson (27): Founded Jet.com, an online retailer.

Jennifer Carter Fleiss (29): Founded The RealReal, a luxury consignment marketplace.