The Polymarket Vs Underdog debate is a controversial one, to say the very least. Many traders believe Polymarket is the obvious choice, while others are adamant that Underdog has more attractive features and benefits for prediction traders in the US.
This guide settles that argument once and for all. We’ll be looking at the features that actually matter for prediction markets and giving you a side-by-side comparison of how the two platforms perform. From accessibility and welcome bonuses to payment methods, market availability, and more, no stone is left unturned here.
As much as we would encourage you to read this entire comparison article to get a real feel of how the two brands perform, not everyone has time. We’ve prepared a concise comparison table that includes some of the key features. Let’s take a closer look:
| Features | Polymarket | Underdog |
| Welcome bonus | Deposit $20 and get $50 | N/a |
| Accessibility | Mobile app access only | Website & app |
| Legal states | 41 | 36 |
| Payment methods | Crypto, Visa, Mastercard, & Bank Transfer | Visa, Mastercard, Apple Pay, & Trustly |
| Support services | Live chat, email, FAQs, & Discord | Live chat, email, & FAQs |
| Markets | Sports, crypto, economics, politics, climate, culture, etc. | Sports, elections, politics, economics, culture, etc. |
Here is a quick summary of the pros and cons of trading at prediction markets like Polymarket and Underdog:
This is a tricky one to answer, as it depends on how you truly define accessibility. On one hand, Polymarket is available in 41 US states, as opposed to Underdog Predict, which is available in only 36 states. This means that in states such as New York and Pennsylvania, where Underdog’s prediction markets are unavailable, traders have an alternative option in Polymarket.
That said, Polymarket prediction markets are currently only available through a native mobile app. In contrast, Underdog is available to traders through both an official app and website, offering extra flexibility. In states where both platforms are available, this may make Underdog the more attractive option.
Trading derivatives involves risk and may not be appropriate for all. For more information visit: https://www.nadex.com/rules and https://underdogfantasy.com/rules. For Crypto.com Predictions, the term "pick" refers to a product traded on CDNA.
Honestly, there isn’t much separating the two platforms in terms of the variety of their prediction markets. Both offer several thousand events to explore every day across sports, economics, politics, climate, culture, and more. The dashboards also make it incredibly easy to navigate through these markets with help from navigation menus and tools to track previous price movements.
However, if you’ve seen the Underdog review, you’ll know that this platform is currently missing cryptocurrency price prediction markets. It’s not clear why they don’t offer this topic. But given that Polymarket offers crypto price markets ranging from 5 minutes to 1 year, you could easily argue it’s the more complete platform.
This next Polymarket Vs Underdog comparison is a lot more clear-cut than some of the previous. That’s because Underdog doesn’t offer a welcome bonus for its prediction market users, or at least it doesn’t at the time of writing. In contrast, Polymarket offers a very appealing welcome bonus that includes a $50 trading bonus when depositing at least $20.
No promo codes are required to claim the Polymarket sign-up bonus; just click the banner above. If an Underdog prediction market bonus is added in the future, you will also be able to see it in the promotional banners.
Polymarket is heavily reliant on cryptocurrency payments for deposits and withdrawals. Even the few fiat currency methods that are accepted are only used to purchase crypto through intermediaries, which is then converted to pUSD and can only be withdrawn as cryptocurrency.
In contrast, Underdog allows traders to process deposits and withdrawals via fiat currency payment methods like Visa, Mastercard, Apple Pay, and Trustly. This makes it a much more suitable option for everyday traders not familiar with crypto.
Honestly, there’s no right or wrong answer when picking between Polymarket and Underdog; both platforms are excellent options. That said, the smartest move is to align your decision with your own personal preferences.
If you’re hoping to trade predictions on crypto prices, make cryptocurrency deposits and withdrawals, or get started with a generous welcome bonus, Polymarket is a solid option. On the other hand, if you want fiat currency payment methods and the ability to trade via the official website, Underdog might be a better choice.
There are plenty more features and benefits for each platform, which you can find in our reviews. Alternatively, you can check these platforms for yourself by using the link in the promotional banners above.
The two prediction markets offer impressive support, with agents typically responding in under five minutes via live chat. It’s worth noting that Polymarket also offers a Discord server as an additional support method.
No, currently Polymarket is only available via the mobile app in the United States. Therefore, traders who prefer to use a computer may need to look for alternatives such as Underdog.
Underdog applies a flat fee of $0.02 to the vast majority of event contracts. Polymarket fees are generally cheaper in most scenarios, but they vary by topic and the value of the event contract.
Since Polymarket processes withdrawals through cryptocurrencies, they are generally faster than Underdog. However, Underdog still processed withdrawals in 1–3 business days, which is faster than the industry average.
Yes, both Polymarket and Underdog are regulated by the Commodity Futures Trading Commission (CFTC) in the United States.
Prediction markets involve financial risk, and outcomes are never guaranteed. In light of this, trading should always be controlled and enjoyable. Keep your activity in check by following responsible trading practices such as:
Only trade money you can afford to lose and stop when your budget is reached.
Avoid increasing trade size or frequency to recover losses.
Don't trade when stressed, tired, emotional, or under the influence.
Take breaks and avoid letting trading interfere with daily life.
Learn how contracts, pricing, fees, and settlement work before trading.
Use spending limits, account history, or self-exclusion tools where available.
To make sure you get accurate and helpful information, this guide has been edited by Jason Bevilacqua as part of our fact-checking process.
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