Comparison · updated July 2026
Metaculus vs Interactive Brokers Forecast Contracts
Metaculus and Interactive Brokers Forecast Contracts 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.
Metaculus
Community forecasting platform focused on calibration and long-horizon questions.
Interactive Brokers Forecast Contracts
CFTC-regulated event contracts inside the IBKR trading platform.
Rating
Metaculus
4.4
Interactive Brokers Forecast Contracts
4.1
Best for
Metaculus
Serious forecasters
Interactive Brokers Forecast Contracts
Existing IBKR clients
Regulation
Metaculus
Non-profit / educational
Interactive Brokers Forecast Contracts
CFTC-regulated
US availability
Metaculus
Available
Interactive Brokers Forecast Contracts
Available
Fees
Metaculus
Free
Interactive Brokers Forecast Contracts
$0.02–$0.10 per contract
Mobile
Metaculus
Good
Interactive Brokers Forecast Contracts
Good
Markets
Metaculus
AI, Politics, Economy, Culture
Interactive Brokers Forecast Contracts
Economy, Financial events, Politics
Payment
Metaculus
Interactive Brokers Forecast Contracts
Founded
Metaculus
Interactive Brokers Forecast Contracts
Verdicts
Who wins, category by category
Best for beginners
Metaculus
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 Metaculus or Interactive Brokers Forecast Contracts?
Metaculus comes out narrowly ahead in our methodology, but both platforms have a clear lane. Choose Metaculus for serious forecasters, and Interactive Brokers Forecast Contracts for existing ibkr clients.