Underdog

This page is about Underdog’s prediction product, Underdog Predict, offered through Underdog’s own exchange UDX and through Kalshi and Crypto.com | Nadex. It is not about Underdog’s fantasy or sportsbook products.

Where it says it is available

Underdog’s help article on eligible states lists the states where Underdog Predict is offered and names Arizona, Michigan, Nevada and New York as ineligible, along with US territories and Ontario.

Where we link it

We link Underdog for US readers in every state except Arizona, Michigan, Nevada and New York, once we know which state you are in. Why we don’t link every venue everywhere.

How its prices compare here

On our market cards each venue’s price sits beside every other venue’s for the same question. Buy at is the lowest price a seller will accept, Sell at is the best a buyer will pay, and Price is used where a venue publishes only one figure. A difference between venues is a price discrepancy, not guaranteed profit: fees, settlement rules and timing differ.

Compare its prices with the other venues on Compare, or visit Underdog’s own site where we link it.

Other venues we compare: Matchbook, Novig, ProphetX, Polymarket US, Kalshi via Robinhood, Kalshi, polymarket.com and Betfair Exchange.

We last checked Underdog’s own pages on 16 October 2026. 18+.

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