Jessica Mah, Mark Zuckerberg

Both Jessica Mah and Mark Zuckerberg were 19 when they launched their respective companies. The difference though is that Mark dropped out of college, Jessica had already finished college.

Jessica Mah: The Most Promising 19 Year Old Tech Entrepreneur In America
Greplin: The First Y Combinator Company To Get Me Excited
Paul Graham: Disrupt
NYTM Mailing List Continued Controversy
Scott 2.0, MeetUp.com 2.0

Jessica Mah: The Most Promising 19 Year Old Tech Entrepreneur In America

Or maybe she is 20 now. But still. Daniel Gross and Jessica Mah you have you to watch out for. Jessica's InDinero, the Mint.com for businesses, is headed for a hundred million plus kind of exit in a few years. Daniel will be swimming in the billion dollar range, if only because his product, Greplin, is just more fundamental. But Jessica has started by monetizing from day one. Three years from now they will not be by the roadside, a has been. They will be bigger than anything we can imagine right now.