Kalshi’s US web traffic has climbed sharply over the past year, even as the prediction market platform faces deeper legal scrutiny over its sports contracts. Similarweb traffic estimates reviewed by Cointelegraph on Friday show Kalshi recorded 15.4 million visits from the United States in July, up about 1,520% from just under 1 million in August 2025.
US users made up nearly 80% of Kalshi’s traffic in July, compared with 72.8% in August 2025, pointing to growth that remains heavily concentrated in its home market.
The increase comes as Kalshi faces mounting legal challenges over whether its sports contracts should be governed at the federal level or under state gambling laws. New Jersey has taken that dispute to the US Supreme Court.
Trading volume has grown even faster
Traffic growth has been matched, and then exceeded, by trading activity. According to a Dune Analytics prediction-market dashboard, Kalshi posted about $40 billion in monthly notional trading volume in August, up from $874 million a year earlier. That works out to roughly 4,500% growth.
Across the broader prediction-market sector, monthly notional volume rose to $50.7 billion from about $2 billion over the same period. Kalshi represented nearly 79% of the latest total.
Barron’s reported Thursday that sports contracts accounted for 83% of Kalshi’s trading volume in July.
Traffic is also rising from restricted jurisdictions
Kalshi also drew more visits from markets where direct access to the platform is restricted under its current member agreement. Canada generated about 450,000 visits in July, up from roughly 50,000 in August 2025. UK traffic rose to 296,000 from 31,000.
Both Canada and the UK are listed among jurisdictions where users are currently barred from directly accessing or trading on Kalshi’s platform. In June, Kalshi partnered with Canadian financial services company Wealthsimple to provide access to nearly 4,000 eligible Kalshi contracts through a separate app.
Even with traffic rising in both countries, their share of Kalshi’s total audience moved lower over the period from August 2025 to July 2026. Canada’s share fell to 2.3% from 3.8%, while the UK’s share slipped to 1.5% from 2.4%.
Cointelegraph said it contacted Kalshi for comment on the traffic coming from restricted jurisdictions but had not received a response by the time of publication.