Polymarket is auditing startups in its developers program that built tools enabling users to replicate trades from accounts suspected of insider activity.
Polymarket Copy-Trading Audit
The prediction market platform, currently valued at roughly $20 billion, launched a review of so-called copy-trading apps after discovering some were marketing the ability to follow traders who may have access to nonpublic information.
These apps participated in a Builders Program that Polymarket introduced last November. Outside developers created tools on top of the platform's technology that track winning streaks, flag unusually timed bets and let customers use bots to mirror those trades for a fee.
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Polycool Insider Trading Guide
One startup in the program, Polycool, features what it calls a "guide to Polymarket insider trading" on its website.
The company argues that decentralized prediction markets operate under different rules than traditional stock exchanges. Another participant, Kreo, advertises the ability to help users "find insiders before the rest."
Both Polymarket and its chief rival, Kalshi, have faced scrutiny over insider trading. Last month, Polymarket introduced clearer rules and enforcement measures.
Polymarket Valuation History
Polymarket's valuation has surged over the past two years. The platform raised $45 million in a May 2024 Series B led by Founders Fund, with participation from Ethereum (ETH) co-founder Vitalik Buterin.
In early 2025, it closed a $150 million round at a $1.2 billion valuation. Intercontinental Exchange, the parent of the New York Stock Exchange, then invested $2 billion in Oct. 2025, pushing Polymarket's valuation to $12 billion.