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