In-depth comparison of Kalshi and Polymarket across regulation, fees, liquidity, markets, and mobile experience. Find out which platform is right for you.

Kalshi vs Polymarket — Which Prediction Market Is Better in 2026?

Last updated: April 2026

Kalshi and Polymarket are the two dominant prediction market platforms, combining for over 90% of global trading volume. But they serve different traders in fundamentally different ways.

Kalshi is a fully CFTC-regulated US exchange with a $22B valuation and 10 million users. Polymarket is a crypto-native platform that recently re-entered the US market after acquiring CFTC-licensed QCEX for $112M.

We compared both platforms across every dimension that matters: fees, markets, regulation, liquidity, and user experience. Here is which one is better — and for whom.

Quick Verdict

If you…	Choose
Live in the US and want the safest regulatory footing	Kalshi
Primarily trade sports	Kalshi (86% of volume is sports)
Want the lowest fees on sports	Polymarket (0.75% vs ~1.75¢ variable)
Trade crypto, geopolitics, or niche markets	Polymarket
Want zero fees on geopolitics markets	Polymarket (0% on geopolitics)
Prefer fiat deposits (bank transfer, debit card)	Kalshi
Are comfortable with USDC and crypto wallets	Polymarket
Want a native mobile app	Kalshi
Live outside the US	Polymarket (only option)

Head-to-Head Comparison

Regulation

Kalshi: CFTC-registered Designated Contract Market (DCM) — the highest tier of federal regulatory authorization. Kalshi built its DCM status from scratch, a multi-year process that gives it the strongest legal standing of any prediction market. The platform operates under direct CFTC oversight with mandatory surveillance, capital requirements, and insider trading enforcement (~200 investigations per year).

Polymarket: Dual structure. Polymarket International operates without US regulation (crypto-native, available in 100+ countries). Polymarket US re-entered the American market through its $112M acquisition of QCEX, which holds CFTC Amended Order of Designation (approved November 2025). This gives Polymarket US a legitimate regulatory pathway, but it is newer and less battle-tested than Kalshi’s DCM.

Historical context: The CFTC fined Polymarket $1.4M in January 2022 for operating without registration. The platform spent 2022-2025 serving only international users before the QCEX acquisition enabled its US return.

Winner: Kalshi — longer track record, purpose-built DCM registration, and stronger institutional credibility.

Available Markets

Kalshi: Sports (NFL, NBA, MLB, NCAA, NHL, golf, soccer), politics (all levels), economics (Fed rates, CPI, unemployment, GDP, S&P 500, NASDAQ), crypto prices, entertainment (box office, awards, TV ratings), weather, and climate. Sports dominate at 86% of total volume.

Polymarket: Politics, crypto (largest global category), sports, geopolitics/world events, science/tech, economics, entertainment. Polymarket has the widest range of niche and international markets — you can trade on topics that Kalshi does not list, including specific geopolitical scenarios, scientific breakthroughs, and cultural events.

Key difference: Kalshi has deeper liquidity in sports and US-centric markets. Polymarket has broader coverage of global, crypto, and niche topics. Polymarket also allows community-driven market creation, leading to a long tail of unique contracts.

Winner: Tie — Kalshi for sports depth, Polymarket for variety and global coverage.

Fees

This is where the platforms diverge significantly.

Kalshi fee structure (variable):

Taker fee: round_up(0.07 × C × P × (1-P)) where C = contracts, P = price
Maker fee: 25% of taker rate: round_up(0.0175 × C × P × (1-P))
Maximum fee occurs at P = $0.50 (about 1.75¢ per contract taker, ~0.44¢ maker)
Fees decrease as prices move toward $0 or $1
No settlement, account, or membership fees
ACH deposits: free. Debit card: 2%. Wire: free (bank may charge)

Polymarket fee structure (taker-only, effective March 30, 2026):

Sports: 0.75%
Crypto: 1.80%
Finance/Politics: 1.00%
Geopolitics/World Events: 0% (free)
Makers pay zero fees and receive rebates (up to 50% in Finance)
On-ramp fees via MoonPay: 3-4.5% card, ~1% bank transfer

Fee comparison on a $100 position at $0.50:

Platform	Sports	Crypto	Politics	Geopolitics
Kalshi (taker)	~$3.50	~$3.50	~$3.50	~$3.50
Kalshi (maker)	~$0.88	~$0.88	~$0.88	~$0.88
Polymarket	~$1.50	~$3.60	~$2.00	$0

Winner: Polymarket — lower fees across most categories, especially sports (0.75% vs variable) and geopolitics (free). Kalshi’s maker fees are competitive for limit-order traders.

Liquidity and Volume

Kalshi: $12.7B in March 2026 monthly volume. $23.8B for full-year 2025. 52.6% of US prediction market share as of January 2026. 23 active market makers with the top 3 providing 70% of election market liquidity. Sub-10ms execution for VIP institutional users.

Polymarket: $7B+ in February 2026 (7.5x YoY growth). 30-day rolling volume of $9.7B by mid-March 2026. Accounts for 77% of Polygon blockchain gas usage and 54% of all Polygon transactions. 191 million transactions in March 2026 alone.

Key difference: Kalshi dominates US volume (especially sports). Polymarket dominates global volume (especially crypto and politics). Combined, they process over $20B monthly.

Winner: Kalshi for US sports liquidity. Polymarket for global crypto/politics liquidity.

Deposit Methods and Onboarding

Kalshi:

ACH bank transfer (free, 1-3 business days with partial instant credit)
Debit card Visa/Mastercard (2% fee, instant)
Wire transfer ($1,000 minimum, free from Kalshi)
Cryptocurrency (Bitcoin, ETH — ~30 minutes)
KYC required (US ID verification)

Polymarket International:

USDC on Polygon (primary method)
Credit/debit card via MoonPay (3-4.5% fee)
Bank transfer via on-ramps (~1% fee)
Non-custodial wallet required (MetaMask or compatible)
No KYC for international version

Polymarket US:

Fiat deposits via QCEX infrastructure
KYC required
1099 tax forms provided

Winner: Kalshi — more deposit options, lower deposit fees, and no crypto wallet knowledge required. Polymarket wins only for users who already hold USDC.

Mobile Experience

Kalshi: Dedicated iOS and Android apps. Ranked #1 finance app in the App Store during late 2025. Full trading functionality, push notifications, real-time price charts.

Polymarket International: Web-based progressive web app (PWA). Functional but not a native mobile experience. No App Store listing for the international version.

Polymarket US: Native app experience via QCEX infrastructure. Still in early rollout as of April 2026.

Winner: Kalshi — mature, native mobile apps on both platforms.

Security and Trust

Kalshi: CFTC-mandated capital requirements, segregated customer funds, mandatory surveillance programs. Runs ~200 insider trading investigations per year. Political candidates banned from trading their own campaigns. Sports industry employees blocked from related markets. Institutional-grade infrastructure.

Polymarket International: Non-custodial model — users hold their own funds in crypto wallets. No central counterparty risk, but also no regulatory safety net. Smart contract risk exists (though Polygon is a mature chain). No insider trading enforcement framework.

Polymarket US: CFTC oversight via QCEX provides regulatory guardrails similar to Kalshi, though the track record is shorter.

Winner: Kalshi for regulatory trust and institutional credibility. Polymarket International for users who prefer self-custody over institutional trust.

Who Should Use Kalshi?

US-based traders who want the strongest regulatory protection
Sports traders — 86% of Kalshi volume is sports, meaning the deepest liquidity for NFL, NBA, MLB, and NCAA markets
Beginners who want a familiar, app-based trading experience with fiat deposits
Limit-order traders who can take advantage of the low maker fee (0.44¢ per contract at $0.50)
Institutional traders — margin trading via Kinetic Markets FCM launched March 2026

Who Should Use Polymarket?

International traders — Polymarket International is the only major option outside the US
Crypto-native users comfortable with USDC wallets and on-chain transactions
Geopolitics and niche market traders — zero fees on geopolitics, widest variety of unique markets
Fee-sensitive sports traders — 0.75% taker on sports is cheaper than Kalshi’s variable rate for market orders
Privacy-conscious users — Polymarket International requires no KYC

Can You Use Both?

Yes. Many active traders use both platforms simultaneously:

Kalshi for sports markets (deeper liquidity, faster execution, native app)
Polymarket for crypto, geopolitics, and niche markets (lower fees, more variety)
Arbitrage: Price differences between the two platforms on the same event create opportunities. When Kalshi prices “Will the Fed cut in June?” at $0.37 and Polymarket prices it at $0.34, buying on Polymarket and selling on Kalshi locks in a $0.03 edge.

The platforms serve complementary roles rather than being strict substitutes.

The Bigger Picture

The prediction market industry did $63B+ in volume in 2025, growing at 400%+ year-over-year. Both Kalshi and Polymarket are well-capitalized ($22B and growing), actively expanding their market offerings, and competing on fees.

For US traders, Kalshi is the safer, more established choice with the best mobile experience and deepest sports liquidity. For global traders and crypto natives, Polymarket offers lower fees, more markets, and a decentralized option that no other platform matches.

The best choice depends on what you trade, where you live, and whether you prefer institutional regulation or self-custody. Increasingly, the answer is both.

MarketsGrade independently compares prediction market platforms. This analysis is updated monthly. Some platforms offer referral programs — see our affiliate disclosure for details.