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Underdog

Underdog is a Brooklyn-based fantasy and prediction-market app offering fixed-payout pick'em, peer-to-peer Pick'em Champions, best-ball drafts and Team Picks event contracts (moneylines, spreads, totals). Since July 2026 its event contracts trade on its own CFTC-regulated exchange, UDX, built on the Aristotle Exchange it bought in March 2026. IG Group agreed on July 30, 2026 to buy Underdog for up to about $1.3 billion, with completion expected in late 2026 or early 2027. The app also sells Underdog Rips trading-card packs.

Pick'emPeer-to-peer pick'emBest ballPrediction market

New-user offer

New customers play $5, get $50 instantly; sign up with code UDPROMO (Underdog's App Store listing instead advertises a Gimme Pick plus up to $1,000 in bonus funds on a first deposit)

Code UDPROMO

Go to Underdog(opens in a new tab)

Offer checked Nov 2, 2026. Terms apply. Must be of legal age in your state. Gambling problem? Call 1-800-GAMBLER.

The short version

What stands out

  • Long-running best-ball platform with tournaments from $3 to $1,000
  • Holds the full prediction-market license set (FCM, DCM and DCO)
  • Pick'em entries from $1; team and player picks can be combined
  • Prediction markets reach states where its fantasy contests aren't offered
  • Terms permit Canadian residents

Worth knowing

  • Gave up DFS licenses in MA, MD, MI, MS, NJ, OH and PA in Sept 2026 (no new drafts there)
  • Pending sale to IG Group could change products or terms
  • Product mix varies widely by state

Where you can play Underdog

Underdog says it is live nationwide through prediction-market Team Picks on its own CFTC-regulated exchange (about 30 states for parlays, per IG Group). Fantasy contests are state-by-state; in September 2026 it gave up its DFS licenses in MA, MD, MI, MS, NJ, OH and PA. Its terms (effective March 2026) still accept Canadian residents.

Underdog compared

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Underdog questions

What states is Underdog legal in?

As of our last check, Underdog accepts players in 35 states: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Kansas, Kentucky, Minnesota, Missouri, Nebraska, New Hampshire, New Mexico, New York, North Carolina, North Dakota, Oklahoma, Oregon, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, West Virginia, Wisconsin and Wyoming. Availability changes, so confirm in the app, which checks your location before you enter.

How old do you have to be to play on Underdog?

18+ in most states. 19 in AL & NE (19 in CO for some games); 21 in AZ & VA (one site disclaimer says AZ & MA).

What is the minimum deposit on Underdog?

The minimum deposit is $10.

How do you withdraw from Underdog?

Underdog pays out by paypal, trustly (online banking), venmo, debit card, paysafe or apple pay. Withdrawals usually require identity verification first.

Does Underdog have a promo code?

New customers play $5, get $50 instantly; sign up with code UDPROMO (Underdog's App Store listing instead advertises a Gimme Pick plus up to $1,000 in bonus funds on a first deposit) Code: UDPROMO. Offers change often and terms apply, so check the details in the app.

Is Underdog available in Canada?

Yes, Underdog is available in at least some Canadian provinces.

Sources and corrections

Last checked Nov 2, 2026. We build every listing from the sources below and recheck them regularly. If something about Underdog has changed, let us know.