Brazil Blocks Polymarket, Kalshi in Sweeping Crackdown on Prediction Market Platforms

Brazil's federal gambling regulator has moved to block domestic access to Polymarket and Kalshi, two of the most widely used prediction market platforms, marking an escalating enforcement campaign against online betting products that fall outside the country's licensed framework.

The National Gaming Secretariat (SENACON) confirmed the action, citing violations of federal gambling laws that require all betting operations to secure explicit government authorization before serving Brazilian users. Both platforms have operated without the regulatory approvals mandated under current law, officials said, prompting the blocks as a compliance enforcement measure. The decision reflects growing concern within Brazil's regulatory apparatus over the rapid expansion of unregulated betting products targeting Brazilian consumers.

The crackdown signals mounting pressure on prediction market operators seeking to operate in jurisdictions with strict gambling oversight. Polymarket, which has gained significant traction among Brazilian users for its real-event contracts, and Kalshi, a CFTC-regulated prediction platform, now face legal barriers to serving the country's market. Regulators warned that any continued service to Brazilian users without proper licensing could result in further enforcement action, including potential financial penalties or expanded blocking measures targeting associated domains and payment processors.

The development underscores a broader regulatory tightening across Latin America's largest economy, where authorities have intensified scrutiny of digital betting platforms over consumer protection concerns, potential financial system risks, and compliance with federal gambling statutes. Industry observers note that other prediction market operators serving Brazil may face similar enforcement actions if they fail to obtain required authorization.