Adjacent
Market indices
Prediction-market indices and reference rates.
Polymarket US Alternatives (2026)
Compare the top 5 platforms similar to Polymarket US. Match on features, US legality, and crypto support to find the right fit for your trading style.
Ranked by shared features with Polymarket US. Last updated November 2026.
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Betfair exchange APIs and historical data.
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Onchain market data API documentation.
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A shared API for prediction-market data and trading.
About Polymarket US
US prediction-market venue with public market pages.
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