universe520 writes: Since 2005 YC has taken on batches of promising founders, and this month will celebrate the funding of its 1,000th startup. Though about half of its startups have failed, which is typical of early-stage investing, it has had a head-turning record of success. In addition to Airbnb, YC has had a hand in Dropbox, a cloud-storage firm, and Stripe, a payments company. Eight of its firms have become what Valley folk call 'unicorns', valued at $1 billion or more. Combined, the companies it has invested in are worth around $65 billion (based on their most recent funding round), although YC's share is only a small fraction of that total—perhaps $1 billion-$2 billion. It is because of this record that YC has become a juggernaut in Silicon Valley.