Compare prediction platforms.
Research Kalshi, Polymarket US, OG and ProphetX. Compare contract focus, documented costs and New York access questions before registering.
Research Kalshi (opens in a new tab), Polymarket US (opens in a new tab), OG (opens in a new tab) and ProphetX. Compare contract focus, documented costs and New York access questions before registering.
At a glance.
CHECKED SEPTEMBER 26, 2026| Platform | Focus | U.S. exchange entity | Access information | New York context |
|---|---|---|---|---|
| Kalshi | Multiple event categories | KalshiEX LLC | Web and app | New York enforcement action announced July 31, 2026. Federal registration does not settle state litigation. |
| Polymarket US | U.S. event contracts | QCX LLC d/b/a Polymarket US | Polymarket US app | New York enforcement action announced September 24, 2026. Use the U.S. product, not the international exchange. |
| OG.com | Sports and other event categories | North American Derivatives Exchange, Inc. | Web and app | OG announced a New York launch in June 2026. |
| ProphetX | Sports event contracts | ProphetX LLC | Check current platform access | Listed as designated in the CFTC register. Current New York account and contract eligibility still need confirmation. |
Exchange listings, provider statements and supplied partner instructions are different kinds of evidence. The notes above do not guarantee account approval or establish a legal conclusion.
Go deeper
For a focused comparison of the two US exchanges, read our Kalshi vs Polymarket US guide.
Partner sign-up links: Kalshi (opens in a new tab), Polymarket US (opens in a new tab), OG (opens in a new tab) and ProphetX (opens in a new tab).
Frequently asked questions
What makes a useful comparison?
Compare the same settlement event, available order size, total fees, funding and withdrawal rules, and current eligibility. A promotional reward alone does not determine suitability.
Have you tested these accounts with real money?
Yes. Catie Di Stefano has funded an account on each of our partner platforms with about $200, placed between 10 and 50 trades depending on the platform, and tested withdrawals. The guides combine that experience with the named primary sources.
Are the listed rewards cash?
Do not assume that. Read each offer’s reward type, crediting conditions, expiry rules, and withdrawal restrictions before relying on its value.
21+ · T&Cs apply · Terms
Certain limitations apply. The offer is available to new users only, subject to the terms and conditions at kalshi.com/tc/500. 18+ only. Restrictions and eligibility requirements apply. Event contract trading involves significant risk and is not appropriate for everyone. Please carefully consider if it is appropriate for you in light of your personal financial circumstances. Kalshi products are not available in all jurisdictions. See kalshi.com/regulatory for more information.