See Also:
The 2011 Digital 100: The World’s Most Valuable Startups
Who Is This Woman And How Is Her Startup Worth $100 Million?
Meet The 25 Youngest Entrepreneurs Running The World’s Most Valuable Startups
Many of the world’s most valuable startups haven’t been around for very long.
Some companies with $100 million+ valuaitons 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.
Article source: SAI http://feedproxy.google.com/~r/typepad/alleyinsider/silicon_alley_insider/~3/vJUduvInUHc/15-valuable-startups-no-one-knew-about-last-year-2011-9