Kalsi chooses Coinbase Custody to secure USDC reserves

A major partnership between Calsi and Coinbase is set to power the infrastructure behind event-based trading in the US

Kalsi, the largest regulated prediction market platform in the US, has selected Coinbase Custody to hold USDC used across event contracts.

The company announced the move on Nov. 13, saying it gives traders further confidence in the stability and safety of the funds backing each market. Coinbase Custody offers cold storage, segregated accounts, and compliance standards commonly used by leading institutions.

Building stability into event-based markets

Prediction markets rely heavily on stability. Users need to know that the money they deposit is safe, especially when trading based on the results of elections, economic indicators, sports results, etc. Kalsi said the partnership brings event contracts closer to becoming a mainstream financial asset by combining a regulated exchange framework with Coinbase’s custodial infrastructure.

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The company also pointed out the importance of USD Coin (USDC) as a core payment asset on the platform. USDC, a fully backed digital dollar, is suitable for real-time trading due to its quick settlement and stable price. Kalsi said that because Coinbase protects these reserves, traders can operate with greater confidence in the integrity of the system.

The announcement comes after Kalshi recently integrated with Coinbase’s Layer 2 network Base in late October. This update reduces the barrier for new users by making USDC deposits faster and cheaper.

A year of rapid expansion for Karshi

Karushi has grown significantly in 2025. An October funding offer valued the company at more than $10 billion, double the $5 billion valuation it received in another $300 million round that month, indicating increased investor interest.

In early June, the company raised $185 million at a valuation of $2 billion, bringing its total funding to $415 million. Competitors such as Polymarket have also seen increased investment, reflecting broader momentum in event-based trading.

The range of platforms has also expanded. On November 6, Google Finance began showing real-time odds from Kalshi and Polymarket, bringing predictive data into mainstream financial search tools. Kalsi’s 2025 election market gained attention when he predicted Donald Trump’s victory hours before traditional media reported on the race.

A partnership with Coinbase Custody is currently in place, creating a foundation designed for long-term stability and growth, Kalsi said.

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