Polymarket vs Kalshi

BetCollector tracks contracts on both Polymarket and Kalshi. Counts below are from the site catalog, not an official statement from either platform.

Polymarket markets in catalog5525
Kalshi markets in catalog1548

Matched Markets

Events identified as the same question on both platforms using BetCollector’s existing matcher.

  • Matched market — Polymarket 20% — Kalshi 17% — difference -2 pp
  • Matched market — Polymarket 11% — Kalshi 12% — difference 0 pp