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Polymarket vs Kalshi: Which Prediction Market Platform Is Better in 2026?

Updated Mar 30, 2026 at 15:06 UTC · 8 min read

Platform Overview

Regulation & Legal Status

This is the single biggest difference between the two platforms and often the deciding factor for most traders.

Kalshi: CFTC-Regulated

Kalshi is a designated contract market (DCM) regulated by the U.S. Commodity Futures Trading Commission (CFTC). It was the first event-contract exchange to receive this designation in 2020. In late 2024, Kalshi won a landmark federal court case against the CFTC, gaining the right to list congressional and presidential election contracts.

For US-based traders, Kalshi offers legal certainty. Your funds are held in regulated accounts, and the platform must comply with strict oversight requirements.

Polymarket: Offshore & Unregistered

Polymarket operates offshore without US regulatory registration. In 2022, it settled with the CFTC for $1.4M for operating an unregistered trading facility. US users are officially geo-blocked, though enforcement of this restriction has been questionable.

In November 2024, the FBI raided CEO Shayne Coplan’s home as part of a DOJ investigation, adding further legal uncertainty for the platform.

Bottom line: If you’re a US resident, Kalshi is the safe choice. If you’re outside the US, Polymarket offers more markets and liquidity.

Fees Comparison

Polymarket

• No explicit trading fees on the platform
• Revenue comes from market-maker spreads
• Minimal gas fees on Polygon (fractions of a cent)
• Effectively zero-fee trading for users

Kalshi

• Per-contract fees on both entry and exit
• Typically 1-3 cents per contract per side
• Occasionally runs zero-fee promotions
• Fee schedule changes frequently — check their site for current rates

Winner: Polymarket — Zero fees vs. per-contract charges is a clear advantage for active traders.

Market Coverage

Polymarket consistently offers more markets across more categories. As a less-regulated platform, it can list markets on trending topics within hours. Categories include politics, crypto prices, AI milestones, geopolitics, culture, and more.

Kalshi focuses on regulated event categories: economic data (Fed rates, CPI, GDP), weather events, elections (after their 2024 court victory), and entertainment awards. The CFTC restricts Kalshi from listing sports betting markets.

At any given time, Polymarket has 500-1,000+ active markets compared to Kalshi’s 100-300. However, Kalshi’s markets tend to be higher quality with clearer resolution criteria.

Liquidity & Volume

Polymarket is the clear leader in volume. During the 2024 US presidential election, Polymarket processed over $9 billion in cumulative trading volume. October 2024 alone saw over $2.5B in volume. Kalshi, while growing rapidly, processed hundreds of millions during the same period.

Higher volume means tighter spreads and better prices for traders. For popular markets (elections, major crypto events), Polymarket typically offers better liquidity.

User Experience

Who Should Use Which Platform?

Choose Polymarket if:

• You’re outside the United States
• You want maximum market variety and access to trending topics
• You’re comfortable with crypto (USDC) deposits
• You want zero trading fees
• You trade frequently and need the best liquidity

Choose Kalshi if:

• You’re a US resident who wants legal certainty
• You prefer fiat (USD) deposits and withdrawals
• You value regulatory protection for your funds
• You want a native mobile app experience
• You primarily trade economic events (Fed rates, CPI, GDP)

Can You Use Both?

Yes, and many active prediction market traders do. Using both platforms gives you access to the widest range of markets and lets you compare odds across platforms to find the best prices. Our live comparison tool tracks price differences between platforms in real time.

Frequently Asked Questions

Is Polymarket legal in the US?

Polymarket is officially geo-blocked for US residents following a 2022 CFTC settlement. While some US users access it via VPN, this carries legal risk. For US-based prediction market trading, Kalshi is the legal alternative.

Which platform has lower fees?

Polymarket has effectively zero trading fees — you only pay minimal Polygon gas fees (fractions of a cent). Kalshi charges per-contract fees on both entry and exit, typically 1-3 cents per contract per side.

Which platform has more markets?

Polymarket typically has 500-1,000+ active markets at any time, compared to Kalshi’s 100-300. Polymarket covers more categories including crypto, AI, culture, and niche geopolitical events.

Can I trade elections on both platforms?

Yes. Both platforms now offer election markets. Polymarket has offered them since launch. Kalshi gained the right to list election contracts after winning a federal court case against the CFTC in late 2024.

Which platform has better odds?

Odds vary by market. Polymarket generally has tighter spreads on popular markets due to higher liquidity. Use our comparison tool to check real-time odds differences.

Related Guides

• How to Trade on Polymarket: Step-by-Step Guide
• How to Use Kalshi: Complete Guide for US Traders
• What Are Prediction Markets?
• Are Prediction Markets Gambling?
• Is Polymarket Legal?
• Crypto Prediction Markets Guide