Polymarket vs PredictIt: Complete 2025 Comparison

Polymarket and PredictIt are two of the most popular prediction market platforms, but they serve different audiences with different rules. Here is a comprehensive comparison to help you choose the right platform.

Quick Comparison

Feature	Polymarket	PredictIt
US Availability	No	Yes
Position Limit	No limit	850 shares
Trading Fee	0-2%	10% of profits
Withdrawal Fee	Gas only	5%
Currency	USDC	USD
Market Types	Diverse	Mostly political
Liquidity	High	Lower

US Availability: The Biggest Difference

For US residents, this comparison is simple: PredictIt is available, Polymarket is not. Polymarket restricts US IP addresses due to regulatory concerns, while PredictIt operates under a CFTC no-action letter that allows limited prediction market trading.

If you are in the US, PredictIt (or Kalshi) is your only legal option. If you are outside the US, the comparison becomes more nuanced.

Position Limits

Polymarket: No Limits

Polymarket has no position limits. If you want to put $100,000 on an election outcome, you can (assuming the liquidity is there). This makes Polymarket suitable for serious traders with larger bankrolls.

PredictIt: 850-Share Cap

PredictIt limits each user to 850 shares per market, with shares maxing at $1 each. This means your maximum position is $850 per market. For casual traders, this is fine. For serious traders, it is a major limitation.

The limit exists because PredictIt operates under regulatory exemptions designed for research purposes, not commercial trading.

Fee Structure

Polymarket Fees

• Trading: 0% maker, 2% taker
• Deposit: 0% crypto, ~3.5% card
• Withdrawal: Network gas (a few cents)

Total cost if using limit orders and crypto: Nearly 0%

PredictIt Fees

• Trading: 10% of all profits
• Deposit: 0%
• Withdrawal: 5% of all withdrawals

Total cost: 10% of profits + 5% of everything you withdraw. This adds up significantly over time.

Fee Impact Example

You make $1,000 profit on a trade and want to withdraw $2,000 total:

• Polymarket: ~$20 taker fees (if not using limit orders), $0.50 withdrawal = ~$20.50
• PredictIt: $100 profit fee + $100 withdrawal fee = $200

The fee difference is dramatic for active traders.

Market Selection

Polymarket Markets

Polymarket offers markets across many categories:

• Politics (US and international)
• Cryptocurrency
• Sports
• Entertainment
• Economics
• Science and technology
• Current events

PredictIt Markets

PredictIt focuses primarily on US politics:

• Presidential elections
• Congressional races
• State elections
• Policy outcomes
• Some international politics

If you want to trade crypto, sports, or entertainment, PredictIt is not for you.

Liquidity Comparison

Polymarket generally has better liquidity, especially in major markets. During the 2024 election, Polymarket's presidential market had tens of millions in volume daily, while PredictIt had significantly less.

Better liquidity means tighter spreads, less slippage, and easier execution. For larger positions, this matters enormously.

User Experience

Polymarket UX

• Modern, clean interface
• Crypto wallet integration
• Order book visible
• Mobile-responsive (no app)
• Discord community support

PredictIt UX

• Older interface design
• Traditional account system
• Simple buy/sell buttons
• Native mobile apps
• Email support

PredictIt feels more like a traditional website; Polymarket feels more like a modern crypto exchange.

Which Platform Is Right for You?

Choose Polymarket If:

• You are outside the United States
• You want to trade larger positions
• You prefer lower fees
• You want diverse market options beyond politics
• You are comfortable with cryptocurrency

Choose PredictIt If:

• You are in the United States
• You prefer USD to crypto
• You focus on US politics
• Position limits are not a concern
• You want a mobile app

Can You Use Both?

If you are outside the US, you could theoretically use both platforms. However, PredictIt's higher fees and position limits make it less attractive for non-US traders. There is little reason to use PredictIt if you have access to Polymarket.

The Future of Both Platforms

PredictIt's regulatory situation remains uncertain. The CFTC has challenged its no-action letter, and the platform's long-term future is unclear. Polymarket continues to grow but faces its own regulatory questions.

Diversifying across platforms may be wise, but US traders have limited options until regulation clarifies.

Key Takeaways

• US residents: PredictIt or Kalshi are your legal options
• Non-US: Polymarket offers better fees, liquidity, and variety
• PredictIt's 850-share limit restricts serious traders
• Polymarket's fees are dramatically lower than PredictIt's
• PredictIt focuses on politics; Polymarket covers everything
• Both platforms face regulatory uncertainty

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