Polymarket vs Other Platforms
Honest comparison of Polymarket, Kalshi, PredictIt, and other prediction markets.
Liquidity, fees, markets, and why Polymarket is best for copy trading.
Platform Comparison at a Glance
| Feature | Polymarket | Kalshi | PredictIt | Manifold |
|---|---|---|---|---|
| Monthly Volume | $100M+ | $10-20M | ~$5M | Play money |
| Platform Fees | 0% | 7% on wins | 10% + 5% w/d | 0% (fake $) |
| US Access | No | Yes (CFTC) | Yes (limited) | Yes |
| Copy Trading | ||||
| Active Markets | 1000+ | 100+ | ~50 | 10,000+ |
| Min. Trade | $1 | $1 | $1 | $0 (fake) |
| Transparency | Blockchain | Centralized | Centralized | Centralized |
Data as of January 2026. Volumes and market counts fluctuate.
Kalshi vs Polymarket
Searchers comparing Kalshi vs Polymarket are usually deciding between US-regulated USD event markets and the larger global Polymarket book (often crypto-rails). Kalshi emphasizes compliance and domestic banking; Polymarket emphasizes breadth, depth, and transparent on-chain activity. Your choice may be constrained by eligibility and local law—verify on each platform's official site, not third-party summaries. For a full side-by-side breakdown, see our dedicated Kalshi vs Polymarket comparison.
Prediction market apps
The best prediction market app depends on whether you need mobile-first trading, bank deposits, crypto wallets, or niche categories (sports, macro, politics). Polycopy is a companion app for Polymarket copy trading—discovery, feed, and optional automation—while execution still flows through Polymarket-compatible accounts where permitted.
New to mechanics? Start with prediction markets for beginners. Questions about trust or legality? See is Polymarket legit.
Platform Deep Dives
Polymarket
The global leader in prediction markets
Strengths
- • Highest liquidity by far ($100M+ monthly volume)
- • Zero platform fees (only gas, pennies per trade)
- • 1000+ active markets across all categories
- • Blockchain transparency (all trades public)
- • Only platform with copy trading (Polycopy)
- • Largest trader community to follow and learn from
Weaknesses
- • Not available to US users (geo-blocked)
- • Requires crypto wallet (small learning curve)
- • Less regulatory clarity in some jurisdictions
Best For: International traders, crypto-comfortable users, anyone wanting to copy trade
Kalshi
US-regulated, CFTC-approved platform
Strengths
- • Legal for US users (CFTC regulated)
- • No crypto needed (USD deposits via ACH/wire)
- • Growing market selection (~100+ markets)
- • Decent liquidity ($10-20M monthly volume)
- • Easy onboarding (traditional banking)
- • Mobile app available (iOS & Android)
- • Tax reporting built-in (1099 forms)
Weaknesses
- • 7% fee on all winnings (significantly higher than Polymarket)
- • Lower liquidity than Polymarket (10-20x less)
- • Fewer markets available (100 vs 1000+)
- • No copy trading infrastructure or public trader data
- • US-only (geo-blocked internationally)
- • More conservative market approval (slower new markets)
- • Limited to CFTC-approved event types
Best For: US traders who want full regulatory compliance and traditional banking integration. Ideal if you're uncomfortable with crypto or want built-in tax reporting. Choose Kalshi if: (1) You're based in the US, (2) You prefer USD over stablecoins, (3) You want CFTC oversight, (4) You don't need copy trading features. However, expect to pay significantly more in fees (7% vs 0-2%) and accept lower liquidity and fewer markets compared to Polymarket.
PredictIt
Academic research platform with real money
Strengths
- • Available to US users
- • Long operating history (since 2014)
- • No crypto required
- • Unique political markets
Weaknesses
- • 10% fee on profits + 5% withdrawal fee
- • $850 max position per market (severely limited)
- • Low liquidity (~$5M monthly)
- • Very few active markets (~50)
- • Clunky UX, outdated platform
- • No copy trading
Best For: US political junkies with small bankrolls. Hard to recommend for serious trading.
Manifold Markets
Play money prediction market
Strengths
- • Completely free (play money)
- • 10,000+ markets (anyone can create)
- • Great for learning prediction markets
- • No regulatory concerns
Weaknesses
- • No real money - play money only
- • Less serious participants (gamified)
- • Many low-quality markets
- • Can't withdraw or profit financially
Best For: Learning how prediction markets work before risking real money. Not for actual trading.
Why Copy Trading Works Best on Polymarket (For Now)
Current state of copy trading infrastructure across platforms
Massive Liquidity
With $100M+ monthly volume, there are actually successful traders worth copying. Lower volume platforms don't have enough proven traders yet.
Blockchain Transparency
All Polymarket trades are on-chain. This makes trader tracking possible. Other platforms currently hide trader data, making copy trading impossible.
500K+ Traders
The largest prediction market community means more strategies to learn from, more traders to follow, better diversification options.
Current state: Polycopy currently only supports Polymarket due to its unique combination of liquidity, transparency, and trader diversity. We're monitoring other platforms as they grow. If Kalshi, PredictIt, or others develop the infrastructure needed for copy trading, we'll evaluate adding support.
Learn more: How copy trading works on Polycopy | Pricing & features
What Would Other Platforms Need?
- • Public trader data: Ability to track individual trader performance
- • API access: Programmatic trading and data retrieval
- • Sufficient liquidity: Enough volume to support copy trading without slippage
- • Diverse trader base: Multiple successful traders across categories
Platform Questions
Which prediction market has the most liquidity?
Polymarket has the highest liquidity of any prediction market, with billions in monthly volume. This means tighter spreads, better prices, and easier entry/exit on trades. Kalshi is second for US users, while PredictIt has much lower liquidity.
Kalshi vs Polymarket: which is better?
It depends on your goals and where you can legally trade. Polymarket tends to win on global liquidity, market variety, and on-chain transparency—and it's the only ecosystem with Polycopy-style copy trading today. Kalshi is built for US-regulated event contracts in USD. Compare fees, access, and product design in the table above, and verify eligibility in your jurisdiction.
What is the best prediction market app?
There is no single 'best' app for everyone. Traders often choose based on geography (who can onboard you legally), asset rails (crypto vs bank USD), market selection, fees, and tooling. If you want the deepest Polymarket liquidity plus copy trading workflows, Polycopy pairs with Polymarket; if you need US-regulated cash markets, Kalshi is a common alternative.
Can I copy trade on platforms other than Polymarket?
Currently, Polycopy only supports Polymarket. Other platforms don't have robust APIs or trader tracking infrastructure needed for copy trading. Polymarket's blockchain-based transparency makes it ideal for following and copying traders.
Is Polymarket legal in the US?
Polymarket is available globally but excludes US users from direct platform access. US users can legally access prediction markets through Kalshi (CFTC-regulated) or PredictIt (no-action letter from CFTC). Always check local regulations.
Which platform has the lowest fees?
Polymarket charges no platform fees - you only pay Polygon network gas fees (pennies). Kalshi charges 7% on winnings. PredictIt charges 10% on profits plus 5% withdrawal fees. Manifold uses play money (no real money trading).
Ready to Start on Polymarket?
Polycopy currently supports Polymarket. We're monitoring other platforms as they evolve.
Currently supports Polymarket • Highest liquidity • Blockchain transparent