Comparison · updated July 2026
Underdog Fantasy vs Interactive Brokers Forecast Contracts
Underdog Fantasy 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.
Underdog Fantasy
Daily fantasy and pick-em products, adjacent to event contracts.
Interactive Brokers Forecast Contracts
CFTC-regulated event contracts inside the IBKR trading platform.
Rating
Underdog Fantasy
4.2
Interactive Brokers Forecast Contracts
4.1
Best for
Underdog Fantasy
Sports pick-em fans
Interactive Brokers Forecast Contracts
Existing IBKR clients
Regulation
Underdog Fantasy
DFS regulator patchwork
Interactive Brokers Forecast Contracts
CFTC-regulated
US availability
Underdog Fantasy
Available
Interactive Brokers Forecast Contracts
Available
Fees
Underdog Fantasy
Standard DFS rake
Interactive Brokers Forecast Contracts
$0.02–$0.10 per contract
Mobile
Underdog Fantasy
Good
Interactive Brokers Forecast Contracts
Good
Markets
Underdog Fantasy
Sports
Interactive Brokers Forecast Contracts
Economy, Financial events, Politics
Payment
Underdog Fantasy
Interactive Brokers Forecast Contracts
Founded
Underdog Fantasy
Interactive Brokers Forecast Contracts
Verdicts
Who wins, category by category
Best for beginners
Underdog Fantasy
Cleaner onboarding and a more polished consumer experience.
Best for regulation
Interactive Brokers Forecast Contracts
Operates as a CFTC-designated contract market.
Best for market variety
Interactive Brokers Forecast Contracts
Wider catalogue of available event contracts.
Final take
Should you choose Underdog Fantasy or Interactive Brokers Forecast Contracts?
Underdog Fantasy comes out narrowly ahead in our methodology, but both platforms have a clear lane. Choose Underdog Fantasy for sports pick-em fans, and Interactive Brokers Forecast Contracts for existing ibkr clients.