DraftKings co-founder Matt Kalish heavily criticized Kalshi in a series of social media posts. He dismissed the prediction market platform as a niche product and questioned its ability to compete with major sportsbooks.

Matt Kalish, who left DraftKings earlier this year, expressed skepticism about Kalshi's potential in the industry. His comments highlighted doubts regarding the platform's scalability and mainstream appeal.

Kalish, along with CEO Jason Robins, played a pivotal role in establishing DraftKings as a prominent player in the sports betting market.