Polymarket vs Kalshi comes down to one structural difference: Kalshi is a CFTC-regulated exchange that settles in US dollars, and Polymarket is a crypto-native platform that settles in USDC on Polygon — though as of late 2025, that line has blurred. Here is what actually differs in 2026, not just the marketing pitch on each homepage.
Regulatory Status: Both Are Now CFTC-Linked, Differently
Kalshi has operated as a CFTC-regulated exchange from the start, built specifically to offer event contracts within US federal financial law. Polymarket took the opposite path — it launched as an offshore, crypto-native platform outside US regulatory authorization, then acquired QCX, a CFTC-licensed exchange, and stood up a separate “Polymarket US” entity in December 2025 to trade legally with American users. The practical result: both platforms now answer to the CFTC, but Kalshi was built for that framework from day one, while Polymarket bolted it on.
Where Each Platform Is Actually Unavailable
Neither platform is available nationwide, and the excluded states overlap heavily:
| Platform | Unavailable states (2026) |
|---|---|
| Kalshi | Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, Nevada, Ohio |
| Polymarket (US) | Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, New Jersey, Nevada, Ohio |
Nevada excludes both over unlicensed-gambling concerns. For the international picture — which countries block each platform entirely — see our Polymarket geo-blocking guide.
Fee Structure Compared
Both platforms moved to a probability-weighted taker fee in the same window. Kalshi’s taker fee peaks around 1.75¢ per contract at a 50¢ price (50% implied probability), tapering off toward the extremes, with makers generally paying less. Polymarket switched on taker fees across nearly every category on March 30, 2026, peaking at roughly 0.75% at the 50/50 price point — notably, Polymarket kept geopolitics and world-event markets fee-free even after this change, while Kalshi’s fee structure applies more broadly across categories.
Settlement Currency and Custody
This is the difference that doesn’t disappear even after the regulatory convergence. Kalshi settles in ordinary US dollars, like any traditional brokerage — your balance sits in a regulated account. Polymarket settles in USDC on Polygon; you hold a crypto wallet, and depending on setup, you may hold your own private keys. If self-custody and on-chain settlement matter to you, that alone can decide the comparison regardless of fees.
Which One Actually Fits Your Situation
Kalshi fits someone who wants a traditional-feeling exchange experience, dollar settlement, and doesn’t want to touch a crypto wallet at all. Polymarket fits someone who wants on-chain settlement, values self-custody, or wants access to the much broader non-US user base and market catalog Polymarket has built over several years as a crypto-native platform. Political markets are a good stress test of that difference — see how each platform priced the 2026 midterms for a concrete comparison. If you’re outside a state or country where either is directly available, that consideration overrides the fee comparison entirely — see our Polymarket legal status guide for the full regulatory picture by jurisdiction.
Accessing Polymarket Where the US App Isn’t an Option
Outside the US, or in a region where neither platform’s official app is accessible, the practical route to Polymarket’s order book is still a Telegram-based bot connecting straight to the Polygon smart contracts. Overdog works this way — non-custodial, deposits from multiple networks (EVM, Tron, Solana, BTC), with its own Polygon node for low-latency execution. It’s not a Kalshi alternative in the regulatory sense, but it is a direct route to the same Polymarket markets discussed throughout this comparison.
FAQ: Polymarket vs Kalshi
Is Kalshi more regulated than Polymarket? Kalshi was built as a CFTC-regulated exchange from launch. Polymarket added CFTC standing later, through its QCX acquisition and the separate Polymarket US entity — both now operate under CFTC oversight, but via different paths.
Which has lower fees, Polymarket or Kalshi? Both use a probability-weighted taker fee that peaks near the 50/50 price point. The exact peak differs (roughly 0.75% for Polymarket vs. about 1.75¢ per contract for Kalshi), and Polymarket keeps geopolitics markets fee-free.
Do I need a crypto wallet for either platform? Yes for Polymarket — it settles in USDC on Polygon. Kalshi settles in ordinary US dollars and does not require one.
Can I use Polymarket if I’m in a Kalshi-excluded state? The excluded-state lists overlap but aren’t identical — check your specific state, and see how Polymarket’s order book and settlement actually function before assuming the two platforms are interchangeable.
See our Disclaimer. This is not financial advice; verify current terms directly with each platform before trading.