ForecastIndex.

ForecastIndex compares prediction-market platforms using public primary sources on fees, access, market mechanics, and resolution rules. Our reviews are desk research; untested claims are identified.

Explore platforms How we research

ForecastIndex may earn a referral benefit if you sign up through links or codes on this site. This does not change our editorial criteria.

01 / Start here

Start with the question.

Read the rule that matters before comparing the platform that offers it.

01 Does a Polymarket referral link include a bonus?Referral and bonus terms, with the important caveats. 02 Kalshi or Polymarket?Compare access, fees, funding, and settlement rules. 03 How does Limitless Exchange work?Market mechanics, outcome shares, and what to verify.

02 / The index

Five platforms, one place.

Full platform index

01 Polymarket crypto-native prediction market 02 Kalshi regulated event contracts platform 03 PredictIt political prediction market 04 Manifold Markets play-money and community forecasting 05 Limitless crypto prediction market

Research coverage is not an endorsement. Commercial relationships are disclosed on the relevant pages.

03 / Read further

Go beyond the headline.

New to prediction markets?

Fee research

Polymarket Fees

Polymarket fee tracker with the documented taker-fee formula, category rates, maker treatment, worked examples, and official source checked October 15, 2026.

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Referral disclosure

Polymarket Referral and Bonus

Looking for a Polymarket referral code? This page covers invite link, promo code, signup bonus, and referral bonus searches with source-backed caveats.

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Alternatives

Polymarket Alternatives

Compare Polymarket alternatives and competitors by market type, availability, fees, funding method, incentives, and platform fit.

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Comparison

Kalshi vs Polymarket

Compare Kalshi and Polymarket by fees, access, funding flow, market style, liquidity, and referral disclosure.

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Platform research

Limitless Exchange

Source-backed Limitless Exchange review covering market mechanics, categories, live-status checks, fee and liquidity questions, and a practical Polymarket comparison.

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Crypto markets

Best Crypto Prediction Markets

Compare crypto prediction markets and crypto-native event platforms by use case, wallet friction, liquidity, market breadth, and risk.

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04 / Our method

Evidence before opinion.

Every comparison starts with documented rules. We distinguish a platform's published claims from what we have personally tested, and separate editorial judgments from referral incentives.

Editorial policy How we make money Corrections & contact

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