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Polymarket vs Kalshi: Complete Comparison

The definitive guide to choosing between the two biggest prediction markets in 2025. Compare fees, features, and discover why copytrading gives Polymarket users an edge.

⚡ Quick Verdict

Choose Polymarket if:

  • You want to copytrade successful whales
  • You want competitive fees with much higher liquidity
  • You want access to 500+ markets

Choose Kalshi if:

  • You're in the US and want full regulatory compliance
  • You prefer traditional banking deposits
  • You want a native mobile app

Feature Comparison

Feature
Polymarket
Kalshi
Winner
Trading Fees
0-1.8% (dynamic)
~1% flat
TIE
Market Selection
500+ markets
200+ markets
POLYMARKET
US Access
Restricted
Full access
KALSHI
Copytrading
Yes (Polyfollow)
No
POLYMARKET
Gas Fees
Sponsored
N/A (centralized)
TIE
Liquidity
High ($500M+)
Medium
POLYMARKET
Settlement Speed
Minutes
Same day
POLYMARKET

The Polyfollow Advantage

Unlike Kalshi, Polymarket users can leverage copytrading through Polyfollow. This means you can automatically mirror trades from proven whales with track records of profitability.

~1%
Max avg trading fee
Instant
Trade mirroring
100+
Whales to copy
Browse Top Traders

Frequently Asked Questions

Is Polymarket or Kalshi better for beginners?

Kalshi is easier for US beginners since it's fully regulated and accessible without VPNs. However, Polymarket offers more markets and copytrading through Polyfollow, which is ideal for beginners who want to learn from experienced traders.

Which has better odds - Polymarket or Kalshi?

Polymarket typically has better odds due to higher liquidity. Both platforms now have comparable fees: Polymarket uses dynamic taker fees (up to ~1.8% at 50/50, lower near certain outcomes), while Kalshi charges a flat ~1%. The larger user base on Polymarket means tighter spreads on popular markets like elections and sports.

Can I use both Polymarket and Kalshi?

Yes! Many traders use both platforms. Kalshi for US-regulated trading with familiar payment methods, and Polymarket for better odds and copytrading features through Polyfollow.

Does Kalshi have copytrading like Polyfollow?

No, Kalshi does not offer copytrading. Polyfollow is exclusive to Polymarket, allowing you to automatically copy trades from successful whales and professional traders.

Which prediction market has lower fees?

Both are now comparable. Polymarket uses dynamic taker fees (0% to ~1.8% max depending on category and price), while Kalshi charges a flat ~1% per trade. For near-certain outcomes, Polymarket fees approach 0%. For 50/50 markets in crypto categories, Polymarket can be slightly higher. Sports and politics fees on Polymarket (0.75-1%) are competitive with Kalshi.