Kalshi vs Polymarket: Which Prediction Market Is Right for You?

Kalshi and Polymarket are the two most prominent prediction market platforms available to US users. They are both legitimate, well-funded, and growing — but they are built on fundamentally different models and serve somewhat different audiences.

This comparison covers the dimensions that matter for most traders: regulation, fees, state access, market selection, and what kind of experience each platform offers.

Regulation and legal structure

Kalshi is a CFTC-registered Designated Contract Market — the same regulatory classification as the Chicago Mercantile Exchange. It operates in US dollars, is subject to federal financial regulation, and was the first US platform to receive this designation for event contracts. Its funds are held in segregated accounts at regulated financial institutions.

Polymarket received CFTC registration in 2024 but operates differently. It is a blockchain-based platform where trades settle on-chain using USDC, a dollar-pegged cryptocurrency. US users can access Polymarket, but additional state-level restrictions apply compared to Kalshi, and the crypto requirement adds a layer of friction.

For most US traders, Kalshi's regulatory structure is simpler to navigate. You deposit dollars, trade in dollars, and withdraw in dollars. Polymarket requires buying USDC and connecting a crypto wallet — a meaningful extra step for non-crypto users.

Fees

This is where Polymarket has a clear advantage for high-volume traders. Polymarket charges no trading fees on most markets. The platform earns from market-making activities rather than per-trade commissions.

Kalshi charges approximately 3% per trade. On a $100 position, that's $3 in fees on entry — and another $3 on exit if you sell before resolution. Fees compound across many trades.

The catch: Polymarket's zero-fee model requires USDC and a blockchain wallet. If you're not already in crypto, the friction of getting set up probably outweighs the fee savings unless you're trading significant volume.

State availability

Kalshi is available in 44+ US states. The main restricted states are Illinois, Maryland, Nevada, Ohio, Arizona, and Montana.

Polymarket's US access is more restricted. Several additional states have raised objections to blockchain-based derivatives, and Polymarket's compliance with US state laws continues to evolve. The restricted list is longer and changes more frequently.

If state availability is a concern, check both platforms' current availability pages — not this guide, which may be out of date by the time you read it.

Trading volume and liquidity

By global trading volume, Polymarket is larger. Its biggest markets — US presidential elections, major Fed decisions, crypto price events — have traded hundreds of millions of dollars. The depth of liquidity on Polymarket's top markets is hard to match.

Kalshi's US-focused model means its liquidity is concentrated differently. Its top markets are well-liquid, but its market breadth is wider, and some of its niche markets are thinner than comparable Polymarket markets.

For most retail traders placing small to medium-sized positions, both platforms have sufficient liquidity on major markets. Institutional traders and large position sizes will feel the difference more.

Market selection

Both platforms offer politics, economics, sports, and crypto markets. Kalshi offers a wider variety of US-specific markets — state-level events, specific economic indicators, and markets that reflect a deep understanding of what US traders care about.

Polymarket's market selection reflects its global user base. It tends to have stronger coverage of international political events and cryptocurrency-related outcomes, and its community can create markets on virtually any topic.

User experience

Kalshi's interface is built for simplicity. The onboarding is straightforward, the market pages are clean, and the trading flow is intuitive for someone coming from a financial app background. No crypto wallet required.

Polymarket's interface is more technically demanding. You need a crypto wallet, USDC, and some familiarity with blockchain transactions. For someone already in DeFi, this is unremarkable. For a first-time user, it's a significant barrier.

Which should you choose?

Choose Kalshi if:

• You're new to prediction markets
• You want to trade in dollars without crypto friction
• You care primarily about US-specific political, economic, and sports markets
• Your state is on Polymarket's restricted list

Choose Polymarket if:

• You're already comfortable with crypto and hold USDC
• You want zero trading fees and trade high volume
• You want access to international markets and the largest global liquidity pools
• You're interested in markets the Kalshi platform doesn't list

There's no reason to use only one. Many experienced traders maintain accounts on both — using Kalshi for its breadth and ease, and Polymarket for the biggest markets where its liquidity advantage matters.