Prediction Market Kalshi Accused of Violating Massachusetts Gambling Laws
On Friday, Attorney General Andrea Joy Campbell filed a lawsuit alleging that prediction market Kalshi is violating Massachusetts’ state gambling laws. The lawsuit claims that Kalshi’s sports event contracts, introduced in January 2025, are in violation of the state’s sports wagering laws, which require operators to be licensed. Campbell is seeking to block Kalshi from offering sports prediction markets in the state without a license, as well as monetary and other relief.
Rise of Prediction Markets
Prediction markets have gained popularity in recent years, with companies like Polymarket and Kalshi attracting significant interest. These markets allow users to predict outcomes on a variety of events, from political elections to sports games. While Kalshi offers a range of prediction markets, the focus of the lawsuit is on its sports-related bets.
The filing alleges that Kalshi’s prediction markets, structured as binary options, operate similarly to licensed sports wagering products, citing FanDuel as an example.
Allegations of Unethical Practices
The lawsuit also accuses Kalshi of using behavioral design mechanisms inspired by gambling psychology to attract users. These tactics, including features that encourage impulsive engagement and diminish users’ perception of financial risk, are alleged to be designed to hook potential bettors.
Campbell emphasized the need for strict regulation in the sports gaming industry, citing the risks of addiction and financial loss associated with sports wagering. She stated that if Kalshi wants to operate in Massachusetts, they must obtain a license to ensure public health and safety.
Kalshi’s Response
In response to the lawsuit, a spokesperson for Kalshi defended the company’s practices, stating that they offer a fair, transparent, federally-regulated marketplace. The spokesperson criticized Massachusetts for attempting to block Kalshi’s innovations using outdated laws, emphasizing the importance of prediction markets as a critical innovation of the 21st century.
Despite the legal challenges, Kalshi remains committed to defending its technology and ensuring that all Americans have access to prediction markets.

