In the past two months, Business Insider has evaluated hundreds of private tech companies and ranked the top 100 by value.
Their rankings is based on several metrics, including revenue, users, market opportunities, growth rates, and the perception of investors and tech gurus.
A lot has changed since we published last year’s list. Since then, three of the top private tech companies—Facebook, Zynga, and Groupon—have gone public. And all of their stocks have crashed.