Polymarket vs Kalshi: Which Prediction Market Is Better?

Polymarket and Kalshi are the two biggest prediction markets. Both let you trade on real-world events, but they differ in regulation, currency, market coverage, and fees. Here's how they compare in 2026.

Side-by-Side Comparison

Feature	Polymarket	Kalshi
Regulation	Offshore (crypto-based)	CFTC-regulated (US legal)
Currency	USDC (crypto stablecoin)	USD (bank transfer, debit)
US Access	Officially blocked	Legal in 47+ states
Active Markets	277+	223+
Trading Fees	None (0%)	$0.02 per contract
Sports Markets	Yes	Yes (CFTC approved)
KYC Required	Minimal	Full (SSN, ID)
Tax Treatment	Varies (crypto)	1099-B (capital gains)
Winning Limits	None	None

Live Market Counts

Right now, Polymarket has 277 active markets and Kalshi has 223 active markets tracked on Alphascope.

Which Should You Use?

Choose Kalshi if:

You're a US resident and want legal, regulated trading
You prefer USD deposits via bank transfer
You want favorable tax treatment (1099-B)
You want sports event contracts

Choose Polymarket if:

You want the deepest liquidity on viral/political markets
You're comfortable with crypto (USDC)
You want zero trading fees
You're outside the US

Why Not Both?

Many serious traders use both platforms to compare odds and find mispricings. Alphascope tracks markets from both Polymarket and Kalshi in one place, making it easy to spot divergences.