The drop in VC dollars flowing into the space is likely due to several factors. Much has been made of the duopoly of Google and Facebook, which together control a significant portion of the US digital ad market, making it tough for private adtech startups to compete. But that's not the only thing that's affected VC interest in the sector: market saturation and disappointing public floats are also contributing factors.
Yet there have been a few bright spots for the adtech space, mostly in the form of market consolidation. A string of adtech companies have been acquired since the beginning of the year, including what's perhaps the most well-known adtech deal of the year: Oracle's takeover of digital ad tracking company Moat for about $850 million in April.
What else has been happening in the space? Here's a datagraphic breaking it all down: