Guides / Comparison
PolyBacktest publishes a large library of backtesting and quant-research articles built around Polymarket data. ProbSights takes a different shape: a live, queryable API — orderbook history, trade history, and backtest-ready historical data — normalized across both Kalshi and Polymarket in one schema, with a cross-venue arbitrage scanner and whale trade tracking built in as product features, not just article topics.
| ProbSights | PolyBacktest | |
|---|---|---|
| Venue coverage | Kalshi + Polymarket | Primarily Polymarket |
| Live queryable data API | Yes | Not primary offering |
| Cross-venue (Kalshi ↔ Polymarket) normalization | Yes | No |
| Cross-venue arbitrage scanner | Yes | No |
| Whale trade tracking | Yes | No |
Data from Kalshi and Polymarket. Search live API docs Pricing