Compare prediction-market data

Neutral, factual explainers comparing prediction market data providers, event contract data, and traditional market data. Each page states what the alternatives are and what differs, without ranking vendors.

Venue, data provider, index provider

Three roles get conflated. A venue lists and settles contracts and owns the terms. A data provider distributes market data from one or more venues. An index provider defines a methodology and calculates a benchmark. It publishes the result with the rules and the audit trail. Adjacent is an index and data provider. It does not accept orders or hold customer funds.

Explainers

• Prediction-market data providers — An overview of prediction market data providers and the roles they play in delivering event contract data, indices, and benchmarks.
• Event-contract data and traditional market data — A factual comparison of prediction-market data and traditional market data. It covers how event-contract data can be organized.
• Kalshi and Polymarket data shapes — A neutral guide to Kalshi and Polymarket data. It covers venues, event contracts, and cross-platform market data.

Sources

• Kalshi
• Polymarket

Page last reviewed: 2026-09-24.