Is Kalshi vs. Polymarket the next OpenAI vs. Anthropic? What to know about the newest big tech rivalry

Reports say the two prediction market platforms’ CEOs have beef—and it could have major implications.

As online prediction markets skyrocket in popularity, two major players have emerged as industry leaders: Kalshi and Polymarket. 

Kalshi has mostly done things by the books, cozying up to the federal government in search of regulation and unmitigated approval. Meanwhile, Polymarket has seemed to make its own rules, letting users bet on controversial topics like civil war and nuclear detonation to rake in massive profits.

Both are vying for the cultural and financial status of being the one prediction market to rule them all—and reports suggest that behind closed doors, the men running the companies are taking it personally.

Here’s what to know about the two platforms, their CEOs, and the apparent growing beef between them.

Who are the Kalshi and Polymarket CEOs?

Kalshi is run by Tarek Mansour, a former Wall Street trader with a degree from MIT. Polymarket’s CEO is Shayne Coplan, an NYU dropout who grew up trading cryptocurrencies online.

The pair’s diverging backgrounds appear to have shaped their approaches to the burgeoning prediction market industry: Mansour has seemed to prioritize federal approvals and caution in Kalshi’s growth, while some critics say Coplan has speedrun his company’s scaling and overseas presence, regulations be damned.

How have Kalshi and Polymarket differed in their business?

Those differences are also reflected in the events that each prediction market hosts. While both Kalshi and Polymarket let users bet on topics like election outcomes, awards show results, and economic trends, only Polymarket has veered into the truly controversial.

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