Polymarket vs Kalshi: Which Prediction Market Should You Trade?
Detailed comparison of Polymarket and Kalshi — fees, liquidity, market selection, regulation, and which platform suits different trading styles. Data-backed analysis.
Two prediction markets dominate in 2026: Polymarket and Kalshi. Both let you trade on real-world events, but they differ in fundamental ways — regulation, fees, market structure, and user experience. Here’s an honest comparison to help you choose.
Quick Overview
| Feature | Polymarket | Kalshi |
|---|---|---|
| Blockchain | Polygon (on-chain) | Centralized (off-chain) |
| Regulation | Offshore (not CFTC-regulated) | CFTC-regulated exchange |
| Currency | USDC | USD |
| Fees | 0% maker / 1-2% taker | 1-7% per contract |
| US Access | Restricted (VPN used) | Fully legal for US users |
| Liquidity | Higher on political markets | Growing, varies by category |
| Market Selection | Broader (crypto, politics, sports) | Curated (events, economics, politics) |
Polymarket: Strengths and Weaknesses
Strengths
Liquidity. Polymarket consistently has the deepest order books for major political and crypto markets. During elections, daily volume can exceed $200M. This means better prices and less slippage.
Market variety. Polymarket covers crypto events, memecoins, geopolitics, entertainment, sports, and niche topics. If it’s newsworthy, someone’s probably created a market for it.
Transparency. Every trade is on-chain on Polygon. Tools like Merlin can analyze the full transaction history of any trader — their positions, P&L, and ROI are publicly verifiable. This transparency powers features like the Merlin leaderboard and insider detection.
Fee structure. Polymarket’s maker-taker fee model is favorable for limit orders. Makers (liquidity providers) pay 0%, while takers pay 1-2%.
Weaknesses
Regulatory uncertainty. Polymarket is not CFTC-regulated and has faced legal scrutiny. US users technically cannot access the platform, though many do via VPNs.
Counterparty risk. While trades settle on-chain, the platform itself is centralized. Deposited funds are held by Polymarket.
No mobile app. Polymarket is web-only, which limits accessibility compared to Kalshi’s native apps.
Kalshi: Strengths and Weaknesses
Strengths
Regulatory clarity. Kalshi is a CFTC-regulated designated contract market (DCM). For US traders, this provides legal certainty and regulatory protections.
USD deposits. No need to convert to crypto — you can fund your account with regular bank transfers or cards.
Mobile apps. Kalshi has native iOS and Android apps, making trading more accessible.
Structured contracts. Kalshi’s contracts are standardized and well-defined, reducing ambiguity about resolution.
Weaknesses
Higher fees. Kalshi’s fee structure is generally higher than Polymarket’s, especially for smaller trades.
Lower liquidity. Except for a few headline markets, Kalshi’s order books are thinner. This means wider spreads and more slippage.
Limited market selection. Kalshi’s curation process means fewer markets overall. Crypto-specific and niche markets are less common.
No on-chain transparency. Kalshi is a centralized exchange — you can’t independently verify trader activity on a blockchain. This limits the kind of analytics that tools like Merlin can provide.
Which Platform for Which Strategy?
For Copy Trading
Winner: Polymarket. On-chain transparency is essential for copy trading. The Merlin leaderboard tracks the top 50 Polymarket traders with verified P&L, win rates, and risk scores. You can evaluate any trader’s full history before following their trades via the Merlin Telegram bot. Kalshi doesn’t offer this level of trader transparency.
For US-Based Casual Trading
Winner: Kalshi. If you’re in the US and want to trade prediction markets legally without VPNs or crypto wallets, Kalshi is the straightforward choice. Fund with USD, trade on mobile, no regulatory gray areas.
For High-Volume Trading
Winner: Polymarket. Higher liquidity + lower fees = better execution for large orders. Whale-tier traders on Polymarket routinely place six-figure positions. Merlin’s whale tracking monitors these large traders in real-time.
For Political Markets
Winner: Polymarket (by liquidity), Kalshi (by legality). Polymarket has deeper political markets, but Kalshi offers US-legal access. If you can access both, check prices on both — arbitrage opportunities exist.
For Analytics and Research
Winner: Polymarket + Merlin. Polymarket’s on-chain data enables deep analytics: trader scoring, insider detection, category P&L breakdown, and market analytics. The Merlin methodology page documents every formula and data source used.
Can You Use Both?
Absolutely. Many serious traders use both platforms:
- Polymarket for high-liquidity political and crypto markets
- Kalshi for US-legal access and unique market types
The key is understanding each platform’s strengths and matching them to your trading goals.
Conclusion
Polymarket leads in liquidity, transparency, and analytics. Kalshi leads in regulatory compliance and accessibility. For data-driven traders who want to evaluate and follow top performers, Polymarket combined with Merlin’s analytics provides the most complete toolkit.
Start by browsing the Merlin leaderboard to see how top Polymarket traders perform, or read our trading strategies guide for tactical advice.