Regulations

Story: Kalshi Sees 1,520% Traffic Surge as Supreme Court Weighs Sports Betting Legality

By Bruce Buterin

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Sports Contracts Drive Volume — and Risk. The reliance on sports contracts is hard to overstate.

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Canada and UK Traffic Climbs, But Share Shrinks. International interest is real, but it's kind of getting swamped by US growth.

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What the Growth Actually Means. Fifteen million visits a month is not a niche platform anymore.

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Kalshi's numbers are staggering. The prediction market platform pulled in 15.4 million US visits in July, up from under 1 million in August 2025 — a 1,520% jump in roughly a year.

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Trading volume tells an even wilder story. Kalshi recorded around $40 billion in monthly notional trading volume in August, compared to $874 million a year earlier.

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They made up 83% of Kalshi's trading volume in July. That concentration is either a strength or a vulnerability — probably both — depending on how courts rule.

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The reliance on sports contracts is hard to overstate. When 83% of your trading volume sits in one contract category that's actively being litigated, the regulatory outcome isn't…

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What's clear is that Kalshi's domestic focus has intensified. US traffic made up roughly 72.8% of visits in August 2025. By July, that share had climbed to nearly 80%.

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International interest is real, but it's kind of getting swamped by US growth. Canada sent about 450,000 visits in July, up from 50,000 the previous August.

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Related: Kalshi Halts Betting on Its Supreme Court Fate Amid $500K Fine Threat from Michigan

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Both Canada and the UK have restrictions that block direct trading on Kalshi's platform. So the visits aren't necessarily translating to accounts in the same way US traffic does.

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In June, Kalshi teamed up with Wealthsimple to offer Canadian users access to its contracts through a new app. It's a workaround, basically.

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The Wealthsimple deal is worth watching. Wealthsimple has a large, digitally native Canadian user base — the kind of retail investor that's already comfortable with app-based…

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Fifteen million visits a month is not a niche platform anymore. Kalshi has crossed into mainstream attention territory, at least by web traffic standards.

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See also: OpenReserve Secures OCC Preliminary Charter Backed by $25M from Andreessen Horowitz

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