Comparison · updated July 2026
Interactive Brokers Forecast Contracts vs Polymarket
Interactive Brokers Forecast Contracts and Polymarket are two of the most discussed prediction market platforms in the US. Here's a side-by-side look at how they compare on the factors that actually matter for traders.
Interactive Brokers Forecast Contracts
CFTC-regulated event contracts inside the IBKR trading platform.
Polymarket
The largest crypto-settled prediction market for global events.
Rating
Interactive Brokers Forecast Contracts
4.1
Polymarket
4.3
Best for
Interactive Brokers Forecast Contracts
Existing IBKR clients
Polymarket
Deepest liquidity and largest market variety
Regulation
Interactive Brokers Forecast Contracts
CFTC-regulated
Polymarket
Offshore
US availability
Interactive Brokers Forecast Contracts
Available
Polymarket
Restricted
Fees
Interactive Brokers Forecast Contracts
$0.02–$0.10 per contract
Polymarket
0% trading fees
Mobile
Interactive Brokers Forecast Contracts
Good
Polymarket
Good
Markets
Interactive Brokers Forecast Contracts
Economy, Financial events, Politics
Polymarket
Politics, Sports, Crypto, Economy, Culture, AI, Entertainment, Technology
Payment
Interactive Brokers Forecast Contracts
Polymarket
USDC (Polygon)
Founded
Interactive Brokers Forecast Contracts
Polymarket
2020
Verdicts
Who wins, category by category
Best for beginners
Interactive Brokers Forecast Contracts
Cleaner onboarding and a more polished consumer experience.
Best for regulation
Interactive Brokers Forecast Contracts
Operates as a CFTC-designated contract market.
Final take
Should you choose Interactive Brokers Forecast Contracts or Polymarket?
For US-based traders, Interactive Brokers Forecast Contracts is the obvious starting point: Polymarket is not legally available in the United States.