Polymarket, a leading decentralized prediction market platform, has initiated an internal audit targeting third-party copy trading applications built on its infrastructure. The move comes amid rising concerns that these apps, which are part of Polymarket's official developer program, may be facilitating or encouraging insider trading by identifying and replicating trades from accounts suspected of using non-public information.
The audit follows the platform's significant growth, driven in part by these third-party integrations, which reportedly contributed hundreds of millions of dollars in additional trading volume. Polymarket launched its "Builders Program" in November 2025 to support external startups and increase platform activity. However, some of these supported startups began marketing features that directly highlight potential insider activity.
One audited startup, Polycool, published a "guide to insider trading on Polymarket" on its website, arguing that the rules of decentralized prediction markets differ from traditional stock markets, stating, "This is not the stock market, where using non-public information can land you in prison." Another startup, Kreo, offered to help users "find insiders before everyone else." These apps generate lists of high-performing traders, flag bets with unusually high amounts or atypical timing, and charge subscription fees for access to this data, allowing users to set up automated bots to copy the trades.
Polymarket recently introduced clearer enforcement rules in March 2026 to address insider trading risks. The current audit aims to assess whether the practices of these copy-trading apps align with Polymarket's updated policies and to tighten oversight across its expanding developer ecosystem. The platform faces increased regulatory scrutiny alongside its main competitor, Kalshi, as the prediction market sector grows. Polymarket's action signals a shift toward stricter governance to maintain fair market conditions and ensure its rapid growth does not compromise market integrity.
