Kalshi vs Polymarket is the most common comparison in US prediction markets, and the two platforms are more different than the shared label suggests. One is a US-regulated exchange built on standard banking. The other is a crypto-native platform with the deepest political and event coverage anywhere.
Note for US readers: Polymarket is now live for real-money trading in the US following its 2025 acquisition of QCX, a CFTC-regulated exchange, available in most states except Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, New Jersey, Nevada and Ohio. New US users can claim a 100% deposit match up to $50 with code ACQUIRE05. Kalshi, also CFTC-regulated, trades in all 50 states.
This guide breaks down Kalshi vs Polymarket across regulation, markets, fees, funding, and sports coverage. In short: Kalshi is the easier starting point for most US traders. By contrast, Polymarket is the deeper pool if you want event variety beyond sports and you’re comfortable with crypto funding.
Below, you’ll find a head-to-head comparison, section-by-section analysis, and a straight answer on which platform suits different types of user.
Kalshi vs Polymarket at a Glance
| Feature | Kalshi | Polymarket |
| Regulation | CFTC Designated Contract Market | CFTC-regulated via QCX licence (offshore roots) |
| US State Availability | All 50 states (real-money trading) | Real-money trading in most states (not AZ, IL, MA, MD, MI, MT, NJ, NV, OH) |
| Funding | Bank transfer, debit card, ACH | USDC stablecoin on Polygon (crypto wallet required) |
| Sports Coverage | Broad: NFL, NBA, MLB, NHL, college, soccer | Growing but narrower in the US |
| Political Markets | Expanding, regulated | Deepest liquidity and market count |
| Fees | Per-trade fee, tight spreads on active markets | Low fees, liquidity varies by market |
| Mobile Apps | iOS and Android, full functionality | iOS strong, Android limited in US |
| Best For | US sports traders and beginners | Political markets and event variety |
21+ only. Gambling problem? Call or text 1-800-GAMBLER (1-800-426-2573). Chat available at ncpgambling.org/chat
Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Not available in AZ, IL, MA, MD, MI, MT, NJ, NV and OH. Gambling problem? Call or text 1-800-GAMBLER (1-800-426-2573). Chat available at ncpgambling.org/chat
Regulation and US Legality
The clearest difference between Kalshi and Polymarket is how each is regulated and where US users can access it. Both operate under the US Commodity Futures Trading Commission (CFTC) framework, but the fit is very different in practice.
Kalshi holds a CFTC Designated Contract Market (DCM) licence. That’s the gold-standard regulatory structure for event contracts in the US, and it means Kalshi is legally available in all 50 states. For users in California, Texas, and other states where mainstream sportsbooks don’t operate, Kalshi is one of the few CFTC-regulated ways to take positions on sports outcomes.
Polymarket has a more complicated regulatory path. It originally operated as an offshore platform using smart contracts on the Polygon blockchain. Its 2025 acquisition of QCX, a CFTC-licensed exchange, gave the company a federal regulatory pathway for US event contracts, and Polymarket now offers real-money trading to US users in most states. It is not available in Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, New Jersey, Nevada or Ohio, so traders in those states should use Kalshi instead.
Both platforms are now live for US real-money trading, so this section is closer than it used to be. Kalshi still has the edge on access — it trades in all 50 states with bank-direct funding, while Polymarket, despite being live via its QCX licence, is unavailable in nine states. If wide state coverage and standard banking matter most to you, Kalshi wins here.
Markets and Event Coverage
Both platforms run thousands of markets across sports, politics, economics, and culture. The balance between those categories is where Kalshi and Polymarket diverge sharply.
Polymarket is the clear leader on non-sports coverage. For example, its 2024 election markets traded billions of dollars in volume, and it remains the deepest pool for political event contracts. Federal Reserve decisions, Oscars winners, geopolitics, cultural events. If it can be framed as a yes/no outcome, Polymarket probably has a market for it. As a result, that depth carries into liquidity. The most-traded Polymarket markets price efficiently and have tight spreads.
Meanwhile, Kalshi has been catching up on non-sports markets and running its own deep political and event slate. However, its bigger advantage sits in US sports. Since the 2025 sports expansion, Kalshi has offered event contracts on NFL, NBA, MLB, NHL, college football and basketball, and major soccer leagues. In particular, the Squawka team tracks Kalshi’s soccer coverage for European league outrights, Champions League knockouts, and USMNT / World Cup markets.
For the full background on how each market structure works, see our guides to what Kalshi is and how it works and how Polymarket’s prediction markets work.
Fees, Spreads, and Liquidity
Prediction-market pricing works differently from a sportsbook. Instead of a built-in house margin, both platforms charge explicit fees and let supply and demand drive the spreads. How that plays out is not the same on each.
Kalshi charges a per-trade fee that varies by market. On the most actively traded contracts, spreads are tight. As a result, the effective cost of trading is low. Sports contracts for mainstream US leagues generally sit near efficient pricing. However, less-active markets can carry wider spreads. That’s a fair trade-off, because thinner markets are thinner on every platform.
Polymarket’s fee structure is lower on paper, but liquidity varies dramatically between markets. The 2024-era political markets price as tightly as you’ll see anywhere. However, more niche markets can have gaps of several percentage points between buy and sell. That compounds quickly if you’re trading in and out. For high-volume markets, Polymarket offers sharper pricing. By contrast, for mid-tier markets, Kalshi tends to be more predictable.
Funding, Withdrawals, and Security
This is the single biggest practical difference between Kalshi and Polymarket, and it’s the one that decides the platform for most US users.
Kalshi accepts standard US banking. Debit card, ACH, and bank transfer all work. Meanwhile, funds sit in regulated custody, and withdrawals process through the same channels. As a result, for a mainstream US user, the experience feels closer to a brokerage app than a crypto product.
Polymarket is crypto-native. Deposits and withdrawals run in USDC stablecoin on the Polygon blockchain. As a result, you’ll need a self-custody crypto wallet to fund your account. That adds a meaningful learning curve if you haven’t used crypto before. On the flip side, it gives you full control of your funds between trades. It also eliminates the banking-channel friction that sportsbooks sometimes impose.
Both platforms enforce KYC identity verification, use two-factor authentication, and run segregated funds at the platform level. Security is strong on either side. The difference is the funding experience, not the safeguards.
Platform and App Experience
The interface matters more than it sounds on paper. Both platforms have clean web apps and usable mobile experiences, but the details differ.
Kalshi’s mobile apps on iOS and Android both run with full functionality across all 50 states. The interface is closer to a stock-trading app than a sportsbook. For example, charts, order books, and market depth are front and centre. As a result, that suits traders who want to see pricing movement. However, newcomers coming from a sportsbook UI will need a minute to orient.
Polymarket’s iOS app is polished — strong probability history and volume visualisations — and now supports real-money trading for eligible US users. The Android experience has lagged: users report narrower functionality on Google Play. If you’re on Android, Polymarket’s web app in a mobile browser is the better route.
Sports Betting on Kalshi vs Polymarket
This is the area Squawka cares about most, and the platforms part ways clearly. Polymarket vs Kalshi for sports is a genuinely one-sided comparison in the US.
In the Kalshi vs Polymarket comparison for sports, Kalshi has the broader US sports slate, better in-play coverage, and a growing catalogue of player-prop and team-market contracts. For example, NFL game markets, NBA outrights, MLB futures, college basketball and football, and major European soccer leagues (Premier League, Champions League, La Liga, MLS, Liga MX) all trade at reasonable volume. As a result, the sponsorship partnerships Kalshi has signed through 2025 have pulled meaningful liquidity into sports event contracts.
By contrast, Polymarket has sports markets, and the very biggest events (World Cup, Super Bowl, major championship finals) trade with decent depth. However, the day-to-day US sports coverage is thinner than Kalshi’s. That includes regular-season NFL, midweek college basketball, and weekly European soccer. On top of that, Polymarket’s state-level restrictions on sports contracts add another layer of friction.
For anyone primarily interested in sports event contracts, Kalshi is the better platform. For political markets that occasionally intersect with sport (league expansion, ownership changes, stadium votes), Polymarket still has its place.
Polymarket vs Kalshi: Which Should You Pick?
There’s no single winner in the Kalshi vs Polymarket comparison. The right pick depends on what you want to trade and how you want to fund it.
Pick Kalshi (Kalshi vs Polymarket: The Easier Starting Point)
You’re focused on US sports, you want standard US banking rather than crypto funding, you live in a state where traditional sportsbooks aren’t available, or you’re new to prediction markets and want the gentlest learning curve. Kalshi is the easier starting point for most mainstream US users, and it’s the Squawka team’s pick for sports event contracts.
21+ only. Gambling problem? Call or text 1-800-GAMBLER (1-800-426-2573). Chat available at ncpgambling.org/chat
Pick Polymarket (Kalshi vs Polymarket: The Deeper Pool)
You want the widest possible range of non-sports event contracts, you’re comfortable with crypto funding and self-custody wallets, you care about political markets specifically, or you want access to niche cultural and economic events that Kalshi doesn’t list. Polymarket is the deeper pool, full stop, for anyone who values variety over simplicity.
Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Not available in AZ, IL, MA, MD, MI, MT, NJ, NV and OH. Gambling problem? Call or text 1-800-GAMBLER (1-800-426-2573). Chat available at ncpgambling.org/chat
Use Both:
There’s no reason you can’t run accounts on both. Each platform covers what the other doesn’t, and having exposure to both gives you access to the widest market set available to US users. Many active prediction-market traders do exactly this. For a wider comparison across Kalshi, Polymarket, Novig, and Underdog Predictions, see our best prediction markets for US traders guide.
You can also read our full reviews of each platform individually: Kalshi and Polymarket.
Kalshi vs Polymarket FAQs
Neither platform is outright better, they serve different needs. Kalshi is better for US sports traders, users in states where sportsbooks are blocked, and anyone who wants standard US banking. Polymarket is better for political markets, the widest event variety, and users comfortable with crypto funding. The Squawka team recommends Kalshi as the default starting point for most US users.
No. Kalshi is a US-native company founded in 2018 and headquartered in New York. Polymarket is a separate platform that originated offshore using blockchain smart contracts and acquired QCX in 2025 to build out its US-regulated footprint. They are independent competitors in the prediction-market space.
Yes. Both platforms operate under the US Commodity Futures Trading Commission framework. Kalshi holds a CFTC Designated Contract Market licence, which is the highest regulatory standard for event contracts in the US. Polymarket runs CFTC-regulated event contracts following its 2025 acquisition of QCX. Both enforce KYC identity verification and use segregated customer funds.
Kalshi yes — it is CFTC-regulated and available for real-money trading in all 50 states under its Designated Contract Market licence. Polymarket is now live for US real-money trading too, following its 2025 QCX acquisition, and is available in most states except Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, New Jersey, Nevada and Ohio.
Kalshi is the clear choice for sports event contracts in the US. It offers broader coverage of NFL, NBA, MLB, NHL, college football and basketball, and major soccer leagues, with better liquidity on day-to-day markets and no state-level restrictions on sports contracts. Polymarket has sports markets but its US sports coverage is narrower and subject to per-market state rules.
No. Kalshi charges a per-trade fee that varies by market, with tight spreads on active contracts. Polymarket’s headline fees are lower, but effective cost depends heavily on liquidity, the most-traded markets price efficiently, while niche markets can carry wider spreads that add to the effective cost of trading.
Kalshi accepts standard US banking methods including debit cards, ACH, and bank transfers. Polymarket is crypto-native and runs on USDC stablecoin via the Polygon blockchain, so you will need a self-custody crypto wallet to fund your account. Both platforms require KYC identity verification before you can trade real money.
Must meet platform age requirements (typically 18+). Prediction markets involve risk of financial loss and should not be treated as a guaranteed source of income. Trade responsibly. If your trading is becoming a problem, contact 1-800-GAMBLER for confidential support.