Best Prediction Market Data Providers in 2025
A comprehensive ranking of the best prediction market data providers including PolyHistorical, Polymarket API, and more.
The Growing Need for Prediction Market Data
As prediction markets grow in volume and sophistication, the demand for reliable historical data APIs has surged. Traders, researchers, and developers need high-quality data to build strategies, conduct research, and develop applications. Here is our ranking of the best prediction market data providers in 2025.
Provider Rankings
| Rank | Provider | Best For | Pricing |
|---|---|---|---|
| 1 | PolyHistorical | Historical order book data, backtesting | Free - $11/mo |
| 2 | Polymarket Official API | Real-time market data, current prices | Free (limited) |
| 3 | Dune Analytics | On-chain analytics, SQL queries | Free - $349/mo |
| 4 | The Graph | Subgraph queries, blockchain indexing | Query-based pricing |
| 5 | Custom scraping solutions | Flexible but maintenance-heavy | Infrastructure costs |
1. PolyHistorical — Best for Historical Order Book Data
PolyHistorical is the leading provider of Polymarket historical order book data. It captures sub-second order book snapshots for all BTC, ETH, and SOL Up/Down markets, providing the granular data needed for backtesting, market making, and quantitative research.
- Sub-second (300ms) order book snapshots
- Full bid/ask depth for every snapshot
- 30-day rolling history
- REST API with JSON, CSV, and Parquet export
- Free tier for BTC markets; Pro at $11/month for all markets
2. Polymarket Official API — Best for Real-Time Data
Polymarket's own API provides current market prices, active market listings, and basic trade data. It is best for real-time applications but has limited historical data depth and no order book history.
3. Dune Analytics — Best for On-Chain Research
Dune lets you write SQL queries against on-chain Polymarket data. It is powerful for custom analytics but requires SQL knowledge and does not provide order book depth data — only settlement and transaction data.
4. The Graph — Best for Developers Building Subgraphs
The Graph protocol can index Polymarket smart contract events. It is useful for custom indexing but requires significant developer effort to set up and maintain, and does not capture off-chain order book data.
Choosing the Right Provider
- For backtesting and quant research: PolyHistorical (historical order books)
- For real-time trading: Polymarket Official API (current prices)
- For on-chain analytics: Dune Analytics (SQL-based exploration)
- For custom blockchain indexing: The Graph (subgraph development)
Why PolyHistorical Ranks First
No other provider offers sub-second historical order book data for Polymarket prediction markets. This data is essential for serious quantitative work — and PolyHistorical makes it accessible with a generous free tier and affordable Pro plan at just $11/month.