The number of unicorns has shot through the roof recently, with currently more than 100 VC-backed companies valued at $1 billion or more. And it seems there is a new startup joining the list each week. These companies get a lot of press when they reach the billion-dollar valuation milestone, but spotting them before they get to that point can be a challenge. We found patterns shared by current unicorns and came up with several data points that can be used to identify future unicorns. For our hand-picked list of unicorn candidates, click here.