Polymarket or Kalshi: which is better?

Polymarket is better for political markets (deeper liquidity), global access (no geo-restrictions for most countries), privacy (no KYC), and cost (no trading fees). Kalshi is better for US users who want legal certainty (CFTC-regulated), fiat deposits (ACH and debit card), tax reporting (issues 1099-B), and diverse market types (weather, economics). If you are outside the US, Polymarket is the clear choice.