Platforms
Polymarket vs Kalshi: which one should you use?
Polymarket is the largest, broadest, crypto-native prediction market. Kalshi is the largest US-regulated one. Pick by jurisdiction, payment rails, and what you want to trade. Detailed comparison below.
These are the two dominant prediction markets in 2026. Together they account for the vast majority of global event-contract volume, and which one suits you depends on three questions: where you live, whether you want to use crypto, and what kind of markets you want to trade.
We use both. They are not really competitors so much as complementary venues. But if you are starting and need to pick one, here is the honest comparison.
The 30-second answer
- You are in the US and want a regulated venue with traditional banking → Kalshi.
- You are outside the US and want the broadest market selection → Polymarket.
- You are comfortable with crypto and want zero or minimal fees → Polymarket.
- You want to trade sports actively → Kalshi.
- You want politics, geopolitics, AI, or culture markets → Polymarket.
Regulation and legal status
Kalshi
Kalshi is a CFTC-regulated derivatives exchange — the only fully licensed, federally regulated prediction market in the United States. Available in 42+ states with explicit regulatory blessing. This is the venue that institutional investors, registered advisors, and tax-conscious traders default to.
Polymarket
Polymarket received CFTC approval in late 2025 to re-enter the US market via a regulated subsidiary, but as of early 2026 access for US residents is still rolling out via an invite-only waitlist. Outside the US, Polymarket operates globally with crypto-based infrastructure. Some jurisdictions (UK, France, Belgium, Singapore, and others) restrict access; check your local rules.
Market selection
Polymarket: broader and deeper
Polymarket lists thousands of active markets across politics, geopolitics, sports, crypto, AI, business, culture, and entertainment. New markets spin up within hours of breaking news. If something is happening in the world, Polymarket usually has a market on it within a day.
Kalshi: deeper in regulated categories
Kalshi's market list is curated and CFTC-approved. That means each contract has been through a regulatory review for clarity and integrity, but it also means novel markets take longer to appear. Sports has become Kalshi's largest category — over 80% of recent volume — followed by US economic indicators, weather, and select political markets.
Fees
Kalshi: per-contract fees
Kalshi charges a per-contract fee that depends on the contract's price. Limit orders that add liquidity (makers) typically pay less than market orders that take liquidity. Exact fee schedules vary by market and change occasionally — check Kalshi's fee page for current rates before sizing big trades.
Polymarket: traditionally near-zero on the global platform
Polymarket's global crypto-native platform historically operated with zero or extremely low explicit trading fees, monetizing instead through spread and ecosystem fees. The new US-regulated platform may have different fee structures as it ramps up.
For active traders, the fee differential can dramatically affect strategy profitability. Casual traders trading $50–500 positions will not notice the difference much.
Payment rails
- Kalshi: USD via ACH bank transfer, debit card, or wire. Withdrawals back to the same source. Fully integrated with US banking. Familiar to anyone who has used an online brokerage.
- Polymarket: USDC (stablecoin) deposited to a wallet. Onboarding now includes fiat-to-USDC ramps that hide most of the crypto complexity, but you still need to be comfortable with the basics: a wallet address, transaction confirmations, gas fees on Polygon (typically pennies).
User experience
Kalshi
Kalshi feels like a stock brokerage. Clean ladder views, limit orders, position management, P&L tracking, mobile app. If you have used Robinhood or Interactive Brokers, you will be comfortable in five minutes.
Polymarket
Polymarket feels like a social trading app. Big colored Yes/No buttons, market images, comments, leaderboards, sharing. The frame is consumer-friendly first and trader-tools second. Power-user features (limit orders, advanced order book) exist but are deeper in the menus.
Liquidity and market quality
For top-volume markets — major elections, championship sports events, big economic decisions — both platforms have plenty of liquidity, with bid-ask spreads typically under 1 cent. For long-tail markets, expect wider spreads and thinner books on both, though Polymarket's larger universe means more long-tail markets exist there.
So which is "better"?
Wrong question. They are different products serving different populations. Some heuristics:
- If you are a new trader who lives in the US: start with Kalshi. Lower friction, regulated, traditional banking, no crypto learning curve.
- If you live outside the US or want broad market selection: Polymarket.
- If you trade enough that fees matter: do the math on actual trade sizes you place. For $1k+ trades on liquid markets, Polymarket's lower fees compound fast.
- If you trade sports: Kalshi has built specialized infrastructure and captures most volume here.
- If you want the absolute frontier of new markets: Polymarket. Things show up there first.