Since its inception in 2005, accelerator Y Combinator [http://ycombinator.com]
has helped fund, advise, and build over 1,400 companies. Some of these have gone
on to become billion-dollar household names-Airbnb. Stripe. Zenefits. Dropbox.

And a few have also died along the way. We wanted to understand these trends and
see what makes a YC company. To do that, we have analyzed data on over 1,000 of
these companies to see what they do, where they are, and how they work. Here's
what we found.

The