Kalshi US visits soar 1,500% as legal pressure mounts
Kalshi visits soar 1500% in the United States after Similarweb estimates showed about 1,520% growth to 15.4 million visits in July from under 1 million in August 2025. Trading volume rose even faster, while legal pressure over sports event contracts intensified, with New Jersey taking the dispute toward the US Supreme Court.
Prediction market platform Kalshi has become a breakout story in fintech and crypto alerts, with US demand driving nearly four-fifths of site traffic even as courts weigh how far its event contracts can go.
Key Takeaways
- US web visits hit 15.4 million in July, up about 1,520% from under 1 million in August 2025, per Similarweb estimates reviewed by Cointelegraph.
- US traffic made up nearly 80% of Kalshi’s July visits, up from 72.8% a year earlier.
- Monthly notional trading volume reached about $40 billion in August, up roughly 4,500% from $874 million a year earlier.
- Sports contracts were 83% of Kalshi’s July volume as New Jersey presses a US Supreme Court fight over state gambling rules.
- Canada and UK visits also jumped, even though Kalshi’s member agreement bars direct access in those markets.
How fast did Kalshi’s US traffic and trading volume grow?
According to Cointelegraph’s report on Similarweb estimates, Kalshi recorded 15.4 million US visits in July, versus just under 1 million in August 2025—about a 1,520% rise in less than a year.
That growth stayed heavily domestic. US traffic accounted for nearly 80% of Kalshi’s visits in July, up from 72.8% in August 2025.
Trading activity outpaced clicks. Kalshi logged about $40 billion in monthly notional volume in August, up from $874 million a year earlier, or roughly 4,500%, based on a Dune Analytics prediction-market dashboard cited by Cointelegraph.
Industry-wide monthly notional volume climbed to $50.7 billion from about $2 billion over the same span, with Kalshi making up nearly 79% of the latest total. Barron’s reported that sports contracts accounted for 83% of Kalshi’s trading volume in July.
Why is regulatory pressure mounting around Kalshi’s sports contracts?
The traffic and volume boom arrives as legal fights intensify over whether Kalshi’s sports contracts fall under federal oversight or state gambling laws.
New Jersey is taking that dispute to the US Supreme Court, raising the stakes for a business model that now leans heavily on sports-linked event contracts.
For traders and operators watching prediction markets, the core tension is clear: retail and institutional interest is surging, but the legal perimeter around sports products remains unsettled.
Where else is Kalshi drawing traffic amid access limits?
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 over the same period.
Both countries are jurisdictions where Kalshi’s member agreement currently prohibits users from directly accessing or trading on the platform. In June, Kalshi partnered with Canadian financial firm Wealthsimple to offer access to nearly 4,000 eligible Kalshi contracts through a separate app.
Even as absolute visits rose, Canada’s share of Kalshi traffic slipped to 2.3% from 3.8%, and the UK’s share fell to 1.5% from 2.4%, between August 2025 and July 2026. Cointelegraph said it contacted Kalshi about restricted-jurisdiction traffic but had not received a response by publication.
Bottom line: Kalshi’s US audience and market share have exploded, yet the platform’s next chapter may be written as much in court as on the exchange.