In the competitive landscape of prediction markets, Kalshi outperforms Polymarket in trading volume, closing June 2026 with $33 billion compared to Polymarket's $14.5 billion. However, Polymarket generally offers lower trading fees and does not charge makers.
Both platforms are regulated by the CFTC. Notably, Polymarket's main platform restricts access for US users. In contrast, Kalshi faces legal challenges concerning its sports contracts across over a dozen states.
Originally, the prediction market space was dominated by Polymarket as a crypto-native option and Kalshi as a compliant US exchange. Currently, other platforms like Rothera and Predictdotfun are emerging, yet Kalshi and Polymarket remain the leaders in transaction volumes and active trades.
The distinctions between these two services are significant. Polymarket operates under a CFTC-licensed US branch while Kalshi's offerings are currently being scrutinized for whether they can be classified as gambling. Their combined trading volume reached $47.5 billion in June 2026, vastly exceeding the average $14 billion monthly for US sportsbooks reported by Pew Research Center in 2025.
Fee Structures and Market Offerings
Below is a summary of the primary differences between Kalshi and Polymarket:
- Kalshi: CFTC-regulated DCM with contracts settled in US dollars, taker fees peaking at 1.75¢ per contract. Offers sports, politics, economics, and more.
- Polymarket: On-chain protocol on Polygon, operates via order-book matching, settling in USDC; has varying fees, but sports markets are free for makers.
As the prediction market sector evolves, Kalshi and Polymarket will likely continue to shape the landscape, despite the increasing competition.
This article is for informational purposes only and is not financial advice.
