France Blocks Polymarket Website Access, Legal Battle Looms

France's National Gambling Authority (ANJ) has ordered a nationwide block of access to Polymarket's website, a blockchain-based prediction market platform. This decision, which came into effect on July 16, 2026, was based on concerns that the platform promoted illegal gambling services and posed risks of market manipulation. In response, Polymarket announced on July 22, 2026, its intention to initiate legal proceedings in France to challenge this regulatory action.

This stringent measure by the ANJ followed previous restrictions on financial transactions from French users, implemented in November 2024, which proved insufficient as users found ways to circumvent them. The regulator noted that despite these earlier blocks, French traffic to Polymarket significantly increased, reaching 578,751 visits with 205,057 unique visitors in June 2026 alone. The ANJ emphasized that the platform operates as an unlicensed gambling service, could expose users to significant financial losses due to a lack of identity checks, and carries risks of market manipulation in some of its offerings. A specific incident in May 2026, involving allegations of hacked weather sensors to manipulate weather-related bets, triggered an investigation by the cybercrime unit of the Paris prosecutor's office.

Polymarket, however, defines itself as an information platform providing peer-to-peer financial instruments tied to verifiable real-world events, rather than a traditional gambling operation. The company states that it does not set odds or profit from outcomes. Expressing disappointment and surprise at the full website block, Polymarket argued that the measure targets not only those engaging in trading but also individuals using the platform purely for informational purposes.

France's decision highlights the ongoing regulatory uncertainty and increased scrutiny surrounding prediction markets globally. Similar regulatory actions have been taken in Spain, Australia, and certain U.S. states, deepening the debate on whether these platforms constitute gambling or legitimate financial products. Reports indicating Polymarket's annualized revenue exceeded $1 billion underscore the sector's significant financial scale and growing regulatory attention. Restrictions on access can impact the information available to market participants and pricing mechanisms, potentially leading to less accurate outcomes in contract pricing.

This incident is part of a broader discussion on how to regulate new blockchain-based digital platforms and apply existing consumer protection frameworks to these innovative models. The integrity of prediction markets and the potential for insider trading have long been sources of concern. Past instances of alleged insider trading on Polymarket related to geopolitical events and even OpenAI have been reported. Regulators also point to the absence of responsible gambling tools and stake limits on these platforms as a significant risk.

While Polymarket has stated its intention to continue constructive dialogue with French authorities, its impending legal challenge is expected to set an important precedent for how blockchain-based prediction markets are distinguished from traditional gambling operations. The outcome of this case could be a critical turning point, either leading to the recognition of prediction markets as financial instruments or paving the way for other regulators to block similar platforms more easily. According to the ANJ, the ban will remain in place until Polymarket fully complies with French regulations.