Kalshi via Onyx

Onyx Predictions LLC is a CFTC-registered introducing broker and NFA member. Its customers trade Kalshi’s event contracts, held at NinjaTrader and cleared through Kalshi Klear, so on our cards Onyx is its own row with Kalshi’s price line labelled “also on Onyx”. This page is not about Onyx’s free-to-play sweepstakes product.

Where it says it is available

Onyx says its Predictions product is available in Alabama, California, Colorado, Idaho, Indiana, Maine, New Jersey, Oklahoma and West Virginia. Its terms set a minimum age of 18, or the age of majority where you are if that is higher.

Where we link it

We show Onyx’s prices to every reader for comparison, and link it only for US readers in Alabama, California, Colorado, Idaho, Indiana, Maine, New Jersey, Oklahoma and West Virginia, 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 Kalshi via Onyx’s own site where we link it.

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

We last checked Kalshi via Onyx’s own pages on 5 November 2026. 18+.

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