Shayne Coplan: Founder and CEO of Polymarket

Born in New York City in 1998, Shayne Coplan is now known as the founder and CEO of Polymarket, a cryptocurrency-based prediction market.

Early in life, Coplan had a deep passion for computer programming and combined it with his interest in the world of cryptocurrency, before it was widely popular. He studied computer science at prestigious New York University, but left during his freshman year. During Covid, and with a focus on prediction markets, he started Polymarket from his apartment.

Polymarket gained attention within some crypto and finance circles during the 2020 election but blossomed into widespread popularity by the 2024 election cycle. By that year, Polymarket had raised tens of millions of dollars and the platform hosted billions in trading volume on the 2024 presidential election alone. Its odds also shifted towards Donald Trump while many traditional polls characterized the race as a tossup.

The way Polymarket works is that users can bet on the odds of an outcome. For instance, Polymarket gives the Democrats a 54% chance to sweep the midterms. A gambler could wager $55 dollars on this outcome, to win $100. They could also wager that the Democrats won’t sweep the midterms for $47 to win $100. The combined odds for each event in a single market are slightly over 100% so that Polymarket makes a profit.

The company has been the source of controversy. Polymarket was not able to operate in the U.S. until 2025, when President Trump loosened restrictions around crypto and betting markets. Still, the U.S. version of Polymarket has less markets open than the worldwide version.Polymarket has experienced criticism not only as a gambling company but also on the ethics of which events people should be able to invest in.

Betting in on sports is not very controversial among the American public. In other areas like war, however, this popularity is less supported. Polymarket currently has markets open like “Will Iran target an Arab country by…?”, “US obtains Iranian enriched uranium by…?”, “Israel closes its airspace by…?”, among others. Coplan contends than even in controversial markets, they inform the public through probabilities that social media, the news, or government cannot.