Kalshi vs Polymarket — which is better in 2026?

For most US traders, Kalshi. It's CFTC-regulated as a US-domiciled exchange, uses USD (not USDC), and has fewer state restrictions. Polymarket US launched later, has deeper liquidity on political and international markets, but requires USDC funding.

What's the difference between Kalshi and Polymarket?

Kalshi is a US-domiciled CFTC DCM funded in USD via ACH. Polymarket US operates on the QCEX exchange (also CFTC-regulated) but requires USDC funding through Polygon. Kalshi has more sports contracts; Polymarket has more political and international ones.

Is Polymarket legal for US traders in 2026?

Yes. Polymarket US, launched on the CFTC-regulated QCEX exchange in 2025, is available in all 50 states. The offshore Polymarket.com still geofences US IPs.

Which has better fees, Kalshi or Polymarket?

Kalshi charges 0–7% depending on contract price; Polymarket US charges a flat 2% on winnings plus USDC on/off-ramp costs. For most retail traders under $500, Kalshi is cheaper end-to-end.

Can I use both Kalshi and Polymarket?

Yes, and many traders do — Kalshi for USD-native and sports, Polymarket for deeper political liquidity. There's no exclusivity clause.

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Kalshi vs Polymarket 2026: Which Is Better for US Traders?

August 25, 2026 9 min read· PredictionRanks Editorial

By Catie Di Stefano August 25, 2026 9 min readReviewed by PredictionRanks Editorial

Verified · Last reviewed August 25, 2026 by Catie Di Stefano

Kalshi and Polymarket are the two most important names in US prediction markets. They have different origins, different architectures, different fee structures, and different strengths.

Kalshi vs Polymarket At a Glance

| Feature | Kalshi | Polymarket US |

|---|---|---|

| Access | Open now | Waitlist/invite |

| Settlement | USD (fiat) | USDC (crypto) |

| Taker fee (50-cent) | ~1.75% | ~1.25% |

| US markets | 600,000+ | Growing |

| Regulation | DCM since 2020 | DCM via QCEX 2025 |

| Min deposit | $1 | Varies |

| Best for | Most US traders | Active/crypto traders |

Quick Verdict

Use Kalshi if you want the broadest US market selection, deepest liquidity on macro and political contracts, and the most established regulatory standing. No crypto wallet required.

Use Polymarket if you want the lowest fees at scale, deepest global liquidity on political and crypto markets, and you are comfortable with USDC settlement. Currently in a phased US rollout.

Use both if you are an active trader who wants to line-shop between platforms.

Background

Kalshi was founded in 2018 by Tarek Mansour and Luana Lara Lopez. It received CFTC Designated Contract Market designation in 2020 — the first prediction market to do so. In 2025, Kalshi raised $1 billion at an $11 billion valuation.

Polymarket was founded in 2020 by Shayne Coplan. It initially operated as a crypto-native platform without CFTC authorization and was fined $1.4 million in 2022. After being forced to block US traders, it became famous during the 2024 US presidential election when it processed $3.7 billion in trades. In 2025, Polymarket acquired QCEX (a CFTC-licensed exchange) for ~$112 million. ICE invested up to $2 billion in Polymarket in October 2025.

Regulation

Kalshi: CFTC DCM (original license, since 2020). Kalshi Klear is a registered DCO. The most comprehensive regulatory structure of any US platform.

Polymarket US: CFTC-regulated via the acquired QCEX license. Newer regulatory standing. Currently in phased US rollout.

Winner: Kalshi — longer track record and more established compliance infrastructure.

Market Coverage

Kalshi: 600,000+ active markets. Sports, politics, macro, crypto, climate, entertainment. Official NHL data partnership. Combos feature (up to 10-leg parlays).

Polymarket US: Currently focused on sports and select non-sports markets in beta. Global Polymarket has 1,000+ markets across all categories with much deeper political and crypto liquidity than any US competitor.

Winner: Kalshi on US breadth right now. Polymarket will likely expand throughout 2026.

Fees

Kalshi formula: 0.07 × contracts × price × (1 − price). Peaks at ~1.75% on 50-cent contracts.

Polymarket US formula: 0.05 × contracts × price × (1 − price) for takers. Maker rebate: 0.0125. 50% taker rebate through April 30, 2026.

On a $1,000 position at 50-cent odds: Kalshi ≈ $17.50; Polymarket ≈ $12.50 (or ~$6.25 with rebate).

Winner: Polymarket — cheaper at scale, especially during the current rebate.

User Experience

Kalshi: Purpose-built prediction market app. Order book visible. Combos well-integrated. Standard fiat banking. $1 minimum deposit. Email-only support.

Polymarket US: Mobile-first beta, sports-focused. Requires USDC. On-chain transparency. Currently invite-only.

Winner: Kalshi on accessibility for non-crypto traders.

Signup and Access

Kalshi: Open to all US residents (except restricted states for sports). Standard KYC. 5-10 minute signup. Bank, debit, Apple Pay, or USDC.

Polymarket US: Phased rollout. Requires waitlist or invite. USDC and crypto wallet setup needed.

Winner: Kalshi — dramatically easier to access today.

Who Should Use Each

Choose Kalshi if you are new, want immediate access, do not have a crypto wallet, primarily trade macro/political/sports, or value the strongest US regulatory standing.

Choose Polymarket US if you are an experienced crypto trader, want the lowest fees at high volume, are primarily interested in political or crypto markets, and are comfortable with USDC.

Use both if you are an active trader making $500+ positions regularly and want to line-shop.

Catie Di Stefano

Founder, PredictionRanks

Catie Di Stefano has spent 15 years working with online gambling across some of the most regulated and competitive gambling markets in the world. Starting at Betsson Group in Malta in 2011, she has worked her way through VIP management, CRM, gamification and marketing leadership across European and North American operations.

Catie was a licensed consultancy for Hard Rock Casino in New Jersey, where she held a DGE vendor license and owned the execution of the online CRM program from launch day in 2018. She has moderated panels and shared stages with US senators, regulators, C-level executives and industry leaders at conferences across North America, Europe and Africa.

In 2026, Catie launched the Campaign Discovery System, a subscription platform that gives CRM teams instant access to 100+ fully built campaigns for online gambling, compliance-mapped across 19 regulated markets and filled with special events, gamification and market insights. PredictionRanks is her independent platform for cutting through the noise around US prediction markets.

Start on Kalshi Try Polymarket

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Kalshi vs Polymarket 2026: Which Is Better for US Traders?

Kalshi vs Polymarket At a Glance

Quick Verdict

Background

Regulation

Market Coverage

Fees

User Experience

Signup and Access

Who Should Use Each

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