event-contracts
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Polymarket
Polymarket turned the future into a constantly repriced feed. Its bigger wager is that a market price can become as familiar - and as useful - as a poll, a pundit or a breaking-news alert.
Kalshi
Kalshi is a New York-based, CFTC-regulated financial exchange where people trade contracts on the outcomes of real-world events - elections, economic data, sports, weather, corporate events and culture. Founded in 2018 by MIT classmates and former quant traders Tarek Mansour and Luana Lopes Lara, it became the first U.S. exchange federally approved to list event contracts. By 2026 it accounts for the large majority of U.S. prediction-market activity, has raised roughly $2.6 billion across its rounds, and was valued at $22 billion after a $1 billion Series F.