Kalshi is the first federally regulated event-contract exchange in the United States, founded in 2018 by MIT graduates Tarek Mansour and Luana Lopes Lara and approved as a designated contract market by the Commodity Futures Trading Commission. That regulatory status is its defining advantage: unlike offshore or purely on-chain rivals, Kalshi operates under the same federal oversight as traditional futures markets, which means clearer legal footing and enforceable payouts for U.S. users.
Its catalog is the broadest in the regulated U.S. space, spanning politics, economics, financial indicators, weather, companies, and a fast-growing sports business that now drives the bulk of its volume. With reported trailing volume around $39.7 billion, Kalshi has the deepest domestic order books, which generally translates into tighter spreads and more reliable fills.
The trade-offs: fees run higher than on zero-fee on-chain venues, and Kalshi is navigating intense regulatory and congressional scrutiny in 2026, including an Oversight Committee inquiry tied to market-integrity concerns. For most U.S. traders who want a legal, well-supported home base, it remains the natural starting point.