vs
Polymarket vs Kalshi — Odds, Fees & Coverage Compared
Polymarket and Kalshi are the two largest sports-oriented prediction markets, but they're structured differently: Polymarket settles in USDC on Polygon with near-zero platform fees on major markets, while Kalshi is a CFTC-regulated exchange charging fees that rarely exceed 2% of expected profit. Both routinely price the same event differently — and differently again from traditional sportsbooks — which is exactly the kind of gap our AI is built to find.
| Polymarket | Kalshi | |
|---|---|---|
| Structure | Peer-to-peer order book (crypto/USDC) | CFTC-regulated exchange (USD) |
| Typical fees | ~0% on major sports markets (blockchain gas only) | Up to ~2% of expected profit |
| Overround (two-sided market) | ~100.0–100.5% | Slightly higher, still well under retail sportsbooks |
| Regulatory status (2026) | Operates internationally; US access has evolved | CFTC-regulated; state-level legal challenges ongoing |
| Settlement | USDC on Polygon | USD, standard bank rails |
Matches Priced on Both Platforms
Polymarket vs Kalshi Articles
Prediction Markets vs. Bookmakers in 2026: How AI Bettors Can Profit from Polymarket and Kalshi
Polymarket and Kalshi now handle billions in sports volume. Here's why prediction markets change the math for AI bettors — from lower vig to cross-market arbitrage — and how to actually exploit them.
Read more →Trading Sports Markets on Polymarket and Kalshi: CLOB Execution, Maker/Taker Strategy and AI Signals
A technical guide to trading sports outcomes on Polymarket and Kalshi through their central limit order books — maker versus taker execution, building a Pinnacle-anchored quoting signal, inventory risk, and the practical differences between the two venues.
Read more →How Prediction Markets Like Polymarket Actually Work — And Why They're Different From Bookmakers
A foundational explainer of how prediction markets such as Polymarket and Kalshi work — shares, order books, resolution, and liquidity — and how that structure fundamentally differs from how a traditional sportsbook prices and profits from bets.
Read more →Polymarket vs Kalshi — FAQ
Prediction markets like Polymarket and Kalshi are third-party platforms not operated by Sports AI. Their availability and legal status vary by country and US state, are subject to change, and are outside our control — always confirm current terms directly with the platform before trading. Nothing on this page is financial or legal advice. 18+, please gamble responsibly.