Guides / Comparison

ProbSights vs. PolyHistorical

PolyHistorical focuses on Polymarket historical order-book data for backtesting. ProbSights covers the same kind of historical data — orderbook depth and trade history — but across both Polymarket and Kalshi, and adds live cross-venue arbitrage and whale tracking on top.

	ProbSights	PolyHistorical
Venues covered	Polymarket + Kalshi	Polymarket
Historical orderbook data	Yes	Yes
Cross-venue arbitrage scanner	Yes	No
Whale trade tracking	Yes	No

Related

• ProbSights pricing
• Best prediction market data provider

Related guides

• Best Prediction Market Arbitrage Tool: Evaluation Guide
• Best Prediction Market Data Provider: What to Look For
• Best Prediction Market Whale Tracker: Evaluation Guide
• Free Kalshi Historical Data: What's Actually Free

Data from Kalshi and Polymarket. Search live · API docs · Pricing