Kalshi vs Polymarket

The two venues that are ~94% of the category, side by side. Composition from Artemis; totals from our own crawl.

KalshiPolymarket
24h volume$457.79M$94.00M
30d volume$14.92B$2.23B
Open interest$1.37B$341.08M
All-time volume$91.15B$48.02B
Marketscounted differently per venue133,9822,100
Sports share19.0%76.0%
Neither sport nor crypto73.3%12.6%
RegulatoryCFTC DCMOffshore / onchain

Kalshi$14.92B

Click a category to drill into its markets
Exotics$10.82BSports$2.83BCrypto$1.16B

Polymarket$2.23B

Click a category to drill into its markets
Sports$1.70BCrypto$254.7MPolitics$131.2MExoticsOther