Kalshi and Polymarket started as polar opposites.
Now the race is close and both are converging on the same technology.
The prediction market wars have shifted from tech to distribution.
@Kalshi targets US retail investors who value regulatory oversight. Their CFTC-licensed DCM status and Robinhood integration unlock mainstream users that offshore competitors can't touch. Their plan is to become the "S&P 500 of events," positioning as infrastructure rather than a betting platform.
@Polymarket targets a global crypto audience that values easy access. By operating onchain and outside of direct US jurisdiction, they have built a moat by being the most culturally relevant prediction market in the world.
Both platforms now center on a CLOB supported by third-party professional market makers to ensure robust liquidity. Kalshi also operates an internal market making arm to provide additional liquidity.
Both focus on the same core markets: sports betting and political outcomes.
But one key difference is how they determine truth.
Kalshi has built a sound resolution system using defined rules at market creation and independent third-party information sources.
This allows for human nuance which is essential for interpreting edge cases, but creates a centralized point of attack and becomes resource intensive as the number of markets increase.
Polymarket uses UMA's Optimistic Oracle, a decentralized system that is censorship resistant and flexible but has led to controversial resolutions.
The rivalry started as a clash of philosophies, but both platforms are converging across most design decisions.
The battle from here will be around distribution and solving user pain points: liquidity, discovery, expression, market creation speed, and resolution trust.

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