Polymarket vs Kalshi

Shayne Coplan was twenty-one years old, a New York University computer science dropout, working alone in a Lower East Side apartment — and then a converted bathroom, for privacy — when he launched Polymarket in June 2020. The idea was straightforward and, at the time, largely ignored: force people to put money behind their predictions, and the resulting prices would tell you more than any poll. The original markets were modest — COVID-19 recovery timelines, the 2020 election — but the founding insight was correct. By the time Joe Biden was called, Polymarket had already been pricing his victory for weeks.

The CFTC settlement in January 2022 was the first near-death experience. Polymarket paid $1.4 million, blocked U.S. users, and moved its international operations through Adventure One Ltd in Panama. What followed was counterintuitive: the platform grew faster outside the United States than it ever had inside. The 2024 presidential election was its breakout moment. Over $3.6 billion was wagered on the single question of who would win the White House. When Polymarket's odds showed Trump at 70% while major polls called it a coin flip, Elon Musk amplified the discrepancy to his 200 million followers. The FBI raid on Coplan's Manhattan apartment in November 2024 — framed by Polymarket as "obvious political retribution" — became, perversely, the best free advertising the platform had ever received.

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Tarek Mansour grew up in Algeria and came to MIT on a scholarship. Luana Lopes Lara grew up in Brazil, the daughter of a schoolteacher, and danced at an elite ballet academy affiliated with the Bolshoi before choosing mathematics. They met in an MIT classroom, ended up in many of the same courses, co-authored papers, and interned at the same firms — Mansour at Goldman Sachs and Citadel, Lara at Bridgewater and Citadel. What they observed across those firms was the same thing: an enormous amount of financial decision-making was being driven by opinions about future events, but there was no clean, direct way to trade on those events. You could trade the equity of a company that would be affected by an election result, but you could not trade the election result itself. In 2018, they founded Kalshi to close that gap. The approach was different from every prediction market before them: instead of operating offshore, accepting cryptocurrency, or relying on a fragile regulatory no-action letter, Kalshi would become a fully licensed US exchange. They joined Y Combinator in 2019 and spent the next two years in direct negotiation with the CFTC — a process that had never been completed by a prediction market operator.

The CFTC approval came in November 2020, making Kalshi a Designated Contract Market — the highest regulatory designation available and the same category as the Chicago Mercantile Exchange. Mansour and Lara were among the youngest founders to win CFTC approval in over a decade. The platform launched its first contract in July 2021. Sequoia Capital led a $30 million Series A. Henry Kissinger and Robert Shiller joined as advisors. The 2024 presidential election was the inflection point: over $800 million was wagered on political markets. When the CFTC under the Biden administration moved to block Kalshi's election markets — arguing they were contrary to the public interest — Lara made the call to sue the federal government. "The only option," she later said, "was to sue." Kalshi won in federal court in September 2024. The ruling opened election markets. Sports markets followed. $238 billion in annual trading volume followed that.

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