Polymarket vs PredictIt: Why Traders Switched

For years, PredictIt was the go-to prediction market for US traders. It operated under a CFTC no-action letter that allowed real-money political trading in the United States. But the landscape has shifted dramatically. PredictIt lost its CFTC authorization, and Polymarket emerged as the dominant platform with deeper liquidity, more markets, and a global user base. This comparison explains what happened, how the two platforms differ, and why the vast majority of prediction market traders have made the switch.

A Brief History

PredictIt's Rise and Fall

PredictIt launched in 2014 under a CFTC no-action letter granted to Victoria University of Wellington, New Zealand. It was structured as an academic research project, which allowed it to operate legally in the US. The platform became popular during the 2016 and 2020 elections, attracting thousands of political traders.

However, PredictIt had significant limitations: an $850 maximum investment per market, high fees (10% on profits, 5% on withdrawals), and a relatively small number of markets. In 2022, the CFTC revoked PredictIt's no-action letter, citing concerns that the platform had strayed from its academic research purpose. PredictIt fought the decision in court but ultimately wound down most operations.

Polymarket's Emergence

Polymarket launched in 2020 as a blockchain-based prediction market using USDC on the Polygon network. It gained mainstream attention during the 2024 US presidential election, where its markets attracted over $3.5 billion in volume and proved more accurate than major polls. By 2026, Polymarket has become the dominant prediction market globally.

Head-to-Head Comparison

Why Traders Switched: The Key Advantages

1. No Fees

PredictIt's 10% profit fee and 5% withdrawal fee were the single biggest complaint from traders. On a winning $850 bet that returned $1,000, PredictIt would take $15 in profit fees and $49.25 in withdrawal fees. That is over 40% of your profit going to the platform. Polymarket charges zero trading fees and zero withdrawal fees (beyond minimal blockchain gas costs).

2. No Position Limits

PredictIt's $850 per-market cap was designed for academic research, not serious trading. It meant you could never make a significant return on a single position and created artificial inefficiencies in the market. Polymarket has no position limits, allowing traders to size positions according to their conviction and capital.

3. Far More Markets

PredictIt focused almost exclusively on US politics, with occasional forays into economics and world events. Polymarket offers markets across every imaginable category: crypto, sports, technology, entertainment, science, weather, and more. This diversity attracts a broader trader base and creates more opportunities.

4. Better Liquidity

With monthly volume exceeding $2 billion, Polymarket offers vastly better liquidity than PredictIt ever did. Tighter spreads mean better execution, and deeper order books mean you can enter and exit larger positions without moving the price.

What PredictIt Did Better

In fairness, PredictIt had some advantages that are worth acknowledging:

• Simplicity: PredictIt used plain USD, not cryptocurrency. There was no need to understand USDC, wallets, or blockchain. Polymarket has improved its onboarding significantly, but the crypto layer still adds a small learning curve for completely non-technical users.
• Regulatory clarity: PredictIt operated under explicit CFTC authorization (until it was revoked). Polymarket's regulatory status is less clear-cut, though the platform has been expanding its compliance efforts.
• Community: PredictIt had a tight-knit community of political junkies who knew each other and shared analysis. Polymarket's community is larger but more diffuse.

The Current Prediction Market Landscape

Beyond Polymarket and the now-defunct PredictIt, several other platforms exist:

How to Transition from PredictIt to Polymarket

If you are a former PredictIt user looking to get started on Polymarket, here is a quick guide:

1. Create an account: Sign up at Polymarket with your email or wallet.
2. Fund your account: Deposit via credit card, bank transfer, or crypto. No $850 limits.
3. Explore markets: Browse by category. You will find all the political markets you traded on PredictIt, plus thousands more.
4. Place your first trade: The interface is intuitive. Select a market, choose Yes or No, set your amount, and confirm.
5. Enjoy zero fees: Your profits are yours. No 10% cut, no 5% withdrawal fee.

FAQ: Polymarket vs PredictIt

Is PredictIt still operating?

PredictIt's operations have been significantly curtailed since losing its CFTC no-action letter. While the legal battle continued, most active markets were wound down. Check PredictIt's website for current status, but most former users have migrated to other platforms.

Is Polymarket legal in the US?

Polymarket operates globally and is accessible in the US, though it does not hold a specific CFTC license like PredictIt did. The regulatory framework for prediction markets continues to evolve. Polymarket has taken steps to increase compliance and work within regulatory frameworks.

Will I pay more taxes on Polymarket vs PredictIt?

The tax treatment of prediction market profits is the same regardless of platform. Consult a tax professional for advice specific to your situation. Polymarket provides transaction history for tax reporting.

Is Kalshi a better PredictIt replacement than Polymarket?

Kalshi is CFTC-regulated and uses USD directly, making it the closest structural replacement for PredictIt. However, Polymarket offers significantly more markets, better liquidity, and zero fees. Most former PredictIt traders have gravitated to Polymarket for the superior trading experience.