Sports platform Sleeper has launched in-app access to prediction markets through a new integration with Kalshi, allowing its estimated 10 million users to trade event-based contracts directly within the Sleeper app.
The rollout initially focuses on sports-related markets, with Kalshi indicating that additional real-world event categories will be added over time.
The partnership extends Kalshi’s distribution strategy, which has seen the prediction market provider power similar products across platforms including Robinhood, Coinbase and PrizePicks.
Kalshi has reported rapid growth in demand, with annualised trading volume exceeding $115bn. High-profile sporting events have been a key driver, with trading on the recent US professional football championship market projected to surpass $800m in volume.
For Sleeper, the integration represents an expansion beyond its core fantasy sports offerings. The app is used for season-long fantasy leagues and social engagement features, alongside its daily fantasy sports Picks product.
By embedding prediction markets into its existing interface, Sleeper is positioning the feature as a complementary engagement tool rather than a standalone product.
Sleeper has not disclosed which jurisdictions will initially support prediction market access, noting that availability will depend on applicable legal and regulatory requirements.
The companies stated that the integration is designed to evolve over time, with further markets and features expected to be introduced.
The Sleeper integration follows recent expansion activity across the prediction markets sector. Winners launched MeVu, a mobile platform offering trading on both Kalshi and Polymarket, while Coinbase rolled out its Kalshi-powered prediction market product across all 50 US states in late January.
Meanwhile, Kalshi has made several high-profile appointments focused on combating insider trading, including promoting Robert DeNault to Head of Enforcement and establishing a new Surveillance Audit Committee.
Kalshi reports annualised trading volume of more than $115bn, reflecting rapid growth in demand for prediction markets tied to sports and real-world events
