PredictIt is a US political prediction market that trades in dollars and historically capped each contract at $850 per trader, while Polymarket's international platform is a crypto order book with no such cap, many more topics and much more money, but closed to US users for new positions. In 2025 the CFTC approved PredictIt's operator to run as a regulated exchange, which changed its limits. Checked on 8 November 2026; Nimb maps Polymarket only.
How do Polymarket and PredictIt compare?
| Polymarket (international) | PredictIt | |
|---|---|---|
| Who can trade | Outside the US and other close-only countries | Mainly US residents |
| Topics | Politics, world events, finance, crypto, sport, culture | Mostly US politics |
| Money | pUSD on Polygon | US dollars |
| Position limits | None set by the platform | Historically $850 per contract |
| Fees | Taker fee by category; makers free | Historically 10% of profits and 5% on withdrawals |
| Data | Free public APIs, on-chain holders | Public prices |
Prices for the same race often differ between the two: different traders, limits and rules. Researchers found daily moves only weakly related across PredictIt, Kalshi and Polymarket in 2024. Polymarket vs Kalshi · Best prediction markets.
Frequently asked questions
Is PredictIt or Polymarket bigger?
Polymarket, by a wide margin in volume and number of markets.
Can I use PredictIt outside the US?
Check PredictIt's own eligibility rules; it has focused on US users.
Last reviewed 8 November 2026 · Data from Polymarket · Not financial advice · Nimb is not affiliated with Polymarket.