Comparison · updated July 2026
ForecastEx vs Underdog Fantasy
ForecastEx and Underdog Fantasy 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.
ForecastEx
An exchange-grade forecast market owned by Interactive Brokers.
Underdog Fantasy
Daily fantasy and pick-em products, adjacent to event contracts.
Rating
ForecastEx
4.4
Underdog Fantasy
4.2
Best for
ForecastEx
Brokerage-grade access via Interactive Brokers
Underdog Fantasy
Sports pick-em fans
Regulation
ForecastEx
CFTC-regulated
Underdog Fantasy
DFS regulator patchwork
US availability
ForecastEx
Available
Underdog Fantasy
Available
Fees
ForecastEx
1 cent per contract
Underdog Fantasy
Standard DFS rake
Mobile
ForecastEx
Good
Underdog Fantasy
Good
Markets
ForecastEx
Economy, Climate, Politics, Financial events
Underdog Fantasy
Sports
Payment
ForecastEx
Bank transfer, IBKR funding
Underdog Fantasy
Founded
ForecastEx
2023
Underdog Fantasy
Verdicts
Who wins, category by category
Best for beginners
ForecastEx
Cleaner onboarding and a more polished consumer experience.
Final take
Should you choose ForecastEx or Underdog Fantasy?
ForecastEx comes out narrowly ahead in our methodology, but both platforms have a clear lane. Choose ForecastEx for brokerage-grade access via interactive brokers, and Underdog Fantasy for sports pick-em fans.