Polymarket and Kalshi's CEOs Hate Each Other

Kalshi CEO Tarek Mansour apparently thinks Polymarket head Shayne Coplan sucks. Coplan seemingly feels the same about Mansour. Good news, fellas: You’re both right! A new report from NPR highlights tension between the heads of the two biggest prediction markets in the business, both of which are run by guys who don’t seem to care for their competition. And while their dick measuring contest has been something of a public endeavor, the report suggests that it’s even worse behind the scenes. Kalshi’s Mansour has been the more willing of the two to acknowledge the relationship between himself and Polymarket’s Coplan, and has called it a Tom Brady/Peyton Manning-style rivalry. So like, imagine if instead of comparing passing yards and touchdowns, Brady and Manning vied to see who could produce the highest amount of trading volume on war crimes. But even with the generous analogy, Mansour is apparently way less playful about the whole thing behind the scenes. NPR talked to a former Kalshi employee who described the culture at the company as being “die-hard,” and said that Mansour endlessly pushes his staff to hit new highs for user sign-ups and other metrics in an effort to chase Polyma