Kalshi Inc. is an American financial exchange and prediction market platform founded in 2018 by MIT graduates Tarek Mansour and Luana Lopes Lara. Based in New York City, Kalshi is the first federally regulated exchange approved by the U.S. Commodity Futures Trading Commission (CFTC) to offer event contracts. This allows both retail and institutional traders to engage in trading based on the outcomes of future events across various sectors, including economics, politics, weather, culture, and science.

The core offering of Kalshi is its event-based trading platform, launched in July 2021. Users can buy and sell binary yes-or-no contracts on specific event outcomes, with each contract paying out $1 if the event occurs. This platform provides a unique pricing mechanism that reflects the market's collective probability estimate of an event's occurrence. Kalshi aims to democratize access to event trading and improve market accuracy, serving a diverse customer base that includes retail traders and institutional investors. The company has experienced rapid growth, employing around 224 people and raising significant funding from notable investors.