The prediction market landscape has grown significantly in recent years. Where once Polymarket stood nearly alone as a serious platform for trading real money on real-world events, there are now multiple options with meaningfully different trade-offs. The right choice depends on who you are, where you live, and what you're trying to achieve.
This comparison covers the four most significant platforms as of early 2026: Polymarket, Kalshi, Manifold, and PredictIt. We'll break down each by market selection, liquidity, fees, geography, verification requirements, and best use case - then give honest guidance on where to start based on your situation.
Note on US users: Polymarket and Manifold have different legal statuses for US residents. Kalshi is the only fully CFTC-regulated US platform allowing real-money trading. PredictIt operates under a no-action letter with position limits. This matters enormously depending on where you are.
Quick Comparison
| Platform | Currency | US Legal | KYC Required | Market Variety | Best For |
|---|---|---|---|---|---|
| Polymarket | USDC (crypto) | No | Yes | Very high | Global real-money traders |
| Kalshi | USD | Yes | Yes | Medium | US users, regulated trading |
| Manifold | Play money (Mana) | Yes | No | Extremely high | Learning, forecasting, fun |
| PredictIt | USD | Limited | Yes | Low (US politics) | US political junkies |
Polymarket is the largest prediction market in the world by trading volume. It launched in 2020 and gained massive traction during the 2024 US election, which saw hundreds of millions of dollars traded on electoral outcomes. It runs on the Polygon blockchain and uses USDC as its settlement currency, meaning all deposits and withdrawals involve cryptocurrency.
Market selection: Polymarket has the widest market selection of any platform - thousands of markets covering politics, economics, crypto, sports, science, entertainment, and more. New markets open daily. This breadth is a major advantage: you can almost always find a market on something you have an opinion about.
Liquidity: For major markets (election outcomes, major sporting events, crypto prices), liquidity is excellent - tens of millions of dollars can be traded without significant price impact. Niche markets can be illiquid, with wide spreads that make small positions uneconomical.
Fees: Polymarket charges a 2% fee on winning payouts. There's no fee on losing trades. For a $100 winning position, you pay $2. This is competitive but adds up for high-frequency trading.
Geography: Available globally except in the United States and a few other restricted jurisdictions. Polymarket requires KYC verification and uses IP and VPN detection to enforce geographic restrictions. US users attempting to trade risk account closure.
Crypto friction: The biggest barrier for newcomers is the crypto requirement. You need to buy USDC on an exchange, bridge it to the Polygon network, and connect a Web3 wallet. This onboarding takes 30-60 minutes for a crypto-naive user and requires comfort with digital asset custody.
Best for: Global traders (non-US) who want the deepest liquidity and widest market selection. Accept crypto friction as the price of admission.Kalshi is unique in the prediction market landscape: it is a CFTC-regulated Designated Contract Market, meaning it's fully legal for US residents to trade real money on it. This regulatory approval, earned in 2020 after a lengthy process, gives Kalshi a structural advantage in the US market that no other prediction platform has matched.
Market selection: Kalshi's market selection is more limited than Polymarket but growing steadily. Markets focus on economic indicators (inflation, interest rates, unemployment), political outcomes (elections, legislation), weather, and some sports. The regulatory framework means Kalshi must get CFTC approval for each new market category, which slows expansion.
Liquidity: Kalshi's overall liquidity is lower than Polymarket, but it has been improving as the platform grows. For their flagship markets (Fed rate decisions, election outcomes), liquidity is adequate for most retail traders. The platform uses a CLOB (central limit order book) system similar to a traditional exchange.
Fees: Kalshi's fee structure is more complex than Polymarket's. They charge a percentage of the total contract value that varies by market, typically ranging from 1.5% to 7% depending on the market and contract type. Fees tend to be highest on very short-term or binary outcome markets.
Depositing and withdrawing: Because Kalshi operates in USD through traditional banking, deposits and withdrawals are simple - bank transfer or credit card. No cryptocurrency knowledge required. This is a major accessibility advantage over Polymarket.
Regulatory status: Kalshi's CFTC regulation cuts both ways. It makes the platform legal in the US and gives users recourse if something goes wrong. But it also means markets are subject to regulatory review and can be delisted if regulators object. Kalshi has faced challenges to some election-related markets.
Best for: US residents who want legal, regulated real-money prediction markets without cryptocurrency complexity. Accept the narrower market selection.Manifold is a play-money prediction market where you trade with Mana (M$), a fictional currency with no direct USD value. This distinction is fundamental: you can't cash out your winnings for real money (though Manifold has experimented with small "Sweepstakes" prizes). What you can do is develop forecasting skills, follow other forecasters, and participate in a vibrant intellectual community without any financial risk.
Market selection: Manifold has the most eclectic and vast market selection of any platform because anyone can create a market on anything. You'll find markets on AI capabilities, tech company valuations, scientific replication, personal bets, and anything else users find interesting. The quality varies enormously - some are carefully calibrated, others are informal.
Social features: Manifold is the most social of the prediction market platforms. You can follow forecasters, comment on markets, see portfolios and track records, and find communities around specific topics. It feels more like a forecasting social network than a trading platform.
For learning: Manifold is arguably the best starting point for newcomers to prediction markets. You can learn market mechanics, develop intuitions about probabilities, and practice without risking real money. The stakes are low enough that you can experiment freely. When you're ready to trade with real money, you'll have a much better foundation.
Limitations: The play-money structure means markets can be less efficiently priced than real-money platforms. When nothing is at stake financially, some participants trade carelessly. The probabilities on Manifold can be less calibrated than on Polymarket or Kalshi, especially on obscure markets.
Best for: Learning prediction markets risk-free, developing forecasting skills, following the forecasting community, and US users who want to participate in a wide range of markets without financial exposure.PredictIt is one of the oldest real-money prediction markets still operating in the US. It runs under a CFTC "no-action letter" which historically allowed it to operate as a research tool under Victoria University of Wellington. Its legal status has been contested and uncertain, and PredictIt has faced existential regulatory challenges.
Fees: PredictIt's fees are high compared to alternatives - a 10% fee on profits plus a 5% fee on withdrawals. These fees significantly erode returns, especially for traders who are right often (you pay more in fees the more you win). This makes PredictIt comparatively unattractive for serious traders.
Position limits: Maximum $850 per contract per market. This hard ceiling limits how much serious money can flow into markets and makes it unsuitable for larger positions. It also limits the depth of liquidity.
Market selection: Almost exclusively US politics - presidential elections, congressional races, Senate confirmations, and similar topics. Deep for its niche but extremely narrow otherwise.
Current status: PredictIt's regulatory situation has been turbulent. In 2022 the CFTC attempted to revoke its no-action letter, which would have shut it down. Legal challenges have kept it operational, but its long-term status remains uncertain. This regulatory risk should factor into your decision.
Best for: US residents deeply interested specifically in US politics who are aware of the high fees and regulatory uncertainty. Most users would be better served by Kalshi for US politics markets.Which Platform Should You Start With?
You're outside the US and comfortable with crypto
Start with Polymarket. The market selection and liquidity advantages are significant, and the USDC/Polygon setup, while initially unfamiliar, is worth learning. Spend an afternoon setting up MetaMask, funding it, and making a few small trades to understand the mechanics. For a detailed step-by-step, read our complete guide to how Polymarket works.
You're a US resident who wants to trade real money
Use Kalshi. It's the only CFTC-regulated platform that gives you legal, straightforward access to real-money prediction markets with USD deposits. The narrower market selection is the trade-off. PredictIt is an alternative specifically for US politics, but Kalshi's fees are much better.
You're new to prediction markets and want to learn
Start with Manifold. Trade play money, experiment freely, develop your forecasting intuition, and follow the community. When you understand the mechanics and have developed some calibration, migrate to a real-money platform. The skills transfer directly.
You want to compare probabilities across platforms
Use all of them as reading tools, even if you only trade on one. Markets across platforms often disagree, and those disagreements are themselves informative. A sophisticated trader monitors Polymarket, Kalshi, and major forecasting aggregators simultaneously to identify genuine mispricing.
The Bottom Line
There's no single "best" prediction market platform - the right choice depends on your geography, risk tolerance, and goals. For depth and liquidity, Polymarket leads. For US legality and simplicity, Kalshi is the answer. For learning without risk, Manifold is unmatched. PredictIt serves a niche that Kalshi is increasingly covering with better economics.
For most serious traders outside the US, Polymarket will be the primary platform and the others serve as reference points. To go deeper on Polymarket strategy, read our guide to trading strategies that actually work, and check out polymarket-book.com for a comprehensive reference on mastering the platform.