The 2011 Digital 100
Alexa von Tobel and Her Startup
Meet 25 Young Entrepreneurs
Many of the world's most valuable startups haven't been around for very long.
Some companies with $100 million+ valuations were founded just this year. Others have been around, but didn't receive any traction until a few months ago.
We compared this year's Digital 100 list to last year's and found the most valuable new additions.