Guides / Comparison
Choosing a prediction market data provider comes down to a few concrete questions.
| Question | Why it matters |
|---|---|
| Which venues are covered? | Single-venue data misses cross-venue signals like arbitrage |
| Is it orderbook depth, or just last price? | Depth is needed for realistic backtests |
| Is trade history included? | Needed to validate fill assumptions |
| Is there a free tier? | Useful for validating before committing |
ProbSights covers Polymarket and Kalshi orderbook + trade history, with a free tier for market search and 1m/5m charts. See pricing.
Data from Kalshi and Polymarket. Search live API docs Pricing