RANKED: The hottest pre-IPO ad tech startups of 2015
fared badly in recent months, but behind the scenes there are some seriously interesting pre-IPO ad tech startups
This ranking looks at the hotter companies subject to IPO (or at least big exit deal) rumors right now. Our data comes from CrunchBase, LinkedIn, our own reporting, and that of other business publications. We've tried to rank them by revenues, but have also taken into account headcounts, venture funding, and recent news and whispers.
See our methodology at the end.