A head-to-head comparison of Polymarket and Kalshi — pricing, the features that actually differ, and which one fits which use case.
The world's largest decentralized prediction market for elections, crypto, sports, and world events
The first CFTC-regulated event contracts exchange — legally trade on economic and political outcomes in the US
These are the 6 capabilities where the two tools genuinely diverge — the rest of their feature sets overlap.
| Capability | Polymarket | Kalshi |
|---|---|---|
| Settlement Mechanism | UMA optimistic oracle | CFTC-regulated exchange |
| Trading Model | CLOB | Central limit order book |
| Collateral Token | USDC | USD |
| Geo Restrictions | US persons blocked | US-focused (not all countries) |
| Market Creation | Permissioned | CFTC-approved only |
| Mobile App | No | Yes |
| Feature | Polymarket | Kalshi |
|---|---|---|
| Settlement Mechanism | UMA optimistic oracle | CFTC-regulated exchange |
| Trading Model | CLOB | Central limit order book |
| Collateral Token | USDC | USD |
| Min Trade | $1 | $1 |
| Api Access | ✓ | ✓ |
| Embeddable Odds | ✓ | ✓ |
| Geo Restrictions | US persons blocked | US-focused (not all countries) |
| Market Creation | Permissioned | CFTC-approved only |
| Mobile App | ✗ | ✓ |
| Governance Token | ✗ | ✗ |
Both tools are free to use — costs come from network or usage fees.
Polymarket
Free
Kalshi
Free
Watch out: US persons geo-blocked — significant market access restriction.
Watch out: Market selection is limited to CFTC-approved topics only.
Polymarket edges ahead on our editorial score (4.6/5), but these tools aren’t straight substitutes. Pick Polymarket when largest prediction market by volume — most accurate probabilities for major events matters most to your workflow; pick Kalshi when cftc-regulated — legally accessible to us persons unlike polymarket is the priority. The deciding factor is usually the trade-off you can least afford — Polymarket means accepting that us persons geo-blocked — significant market access restriction, while Kalshi means market selection is limited to cftc-approved topics only.
Polymarket carries the higher editorial rating (4.6/5 vs 4.3/5), but they solve different problems. Polymarket is the stronger pick when you need largest prediction market by volume — most accurate probabilities for major events. Kalshi wins when cftc-regulated — legally accessible to us persons unlike polymarket.
Both tools are free to use, with costs coming from network or usage fees rather than subscriptions.
Polymarket's main limitation is that us persons geo-blocked — significant market access restriction. For Kalshi, market selection is limited to cftc-approved topics only. Weigh these against how you actually plan to use the tool.
In most cases yes — many teams run both, using each where it's strongest. Since Polymarket leads on largest prediction market by volume — most accurate probabilities for major events and Kalshi on cftc-regulated — legally accessible to us persons unlike polymarket, the two are often complementary rather than mutually exclusive.