Everyone wants to be the next billion dollar startup, but so far not many have been fortunate enough to get there. It takes a lot of work and huge customer adoption to even come close.

Facebook, Twitter, Square, Airbnb, and Groupon are just a few of the household names that have made it to a billion dollar valuation. If you’re curious about what it takes to get to a billion dollar valuation, Staff.com has put together a beautiful infographic outlining some key factors behind startups valued at a billion dollars or more.

The infographic takes a look at 14 startups that have been valued at a billion dollars (or really damn close like Instagram). Facebook, Twitter, Workday, DropBox, Groupon, Square, HomeAway, Spotify, Zynga, Airbnb, Box, Evernote, and Instagram are all featured in the infographic.

One of the most interesting facts in the research is that Facebook has a market value that is greater than all of the other companies combined. Wow!

Another very interesting fact is number of employees. Facebook has nearly 4,000 employees and Instagram (now part of Facebook) has just 13. DropBox, which ranked 4th on the list by valuation has 194 employees, and Zynga which ranks 9th has nearly 3,000 employees.

If you’re thinking a billion dollar valuation would sure be nice, check out the infographic below:

Staff.com also chronicled the failure of startups in this infographic.