Polymarket accused Kalshi of engaging in commercial espionage, claiming there were "too many coincidences" in the product's early launch.

CoinFeed reported on June 4th that, according to the New York Post, prediction market platform Polymarket believes its competitor Kalshi may be conducting corporate espionage against its New York office and employees. A Polymarket marketing director confirmed the company is investigating, stating that there are too many coincidences and that Kalshi has malicious intentions. Polymarket has compiled an internal file called "Imitators," documenting approximately a dozen suspicious incidents.