Kalshi and Polymarket Combined Volume Hits $45 Billion in June

Prediction markets are on fire. Kalshi and Polymarket pulled in a combined $45 billion in volume during June — a 75% surge.

Kalshi was the big winner here. It grew 87.4% month-over-month, hitting $31.5 billion from $16.81 billion in May. That’s a monster jump even by prediction market standards.

What’s driving it? World Cup fever is a big part of the story. Betting on match outcomes, tournament winners, and player performances is pouring volume into these platforms. But it’s not just soccer — US election contracts, economic data bets, and crypto price predictions are all seeing action too.

Polymarket isn’t slouching either. The crypto-native platform continues to draw volume from the same crowd that’s been using it since the 2024 election cycle.

The $45 billion combined figure represents real momentum for what was still a niche space just a couple of years ago. Prediction markets are going mainstream.