Crypto-based prediction market Polymarket has tapped blockchain analytics firm Chainalysis to monitor trading activity and enforce its market rules, as it works to address concerns about insider trading and market integrity.

Chainalysis brings a suite of tools, including investigative software and onchain monitoring systems, to flag suspicious behavior, based on a model designed to identify patterns consistent with traders acting on non-public information, the firms announced on Thursday.

The move comes amid growing scrutiny of prediction markets. Critics have argued that platforms like Polymarket could be vulnerable to insiders — such as political operatives or corporate employees — placing informed bets before information becomes…