PolymarketData.co alternative
PMData vs PolymarketData.co
PolymarketData.co is a JSON API for minute-level Polymarket history: prices, volume, liquidity, spread, and the last order book of each minute. PMData records every order book update, trade, and on-chain fill as Parquet files, with microsecond timestamps, from $49/month. A 5-minute market has five book states at 1-minute resolution; PMData's files hold every change in between.
Last updated
Competitor details as of , per each vendor's public site.
| Feature | PMData | PolymarketData.co |
|---|---|---|
| Dataset | Polymarket + Chainlink (no proxy) | Polymarket prices & metrics |
| History | Since 2026-02 | Since 2025-08 |
| Order book | Raw WebSocket messages | 1-minute snapshots |
| Latency (p50 / p99)Receive time minus Polymarket event time | 4.6 / 40.1 ms | N/A |
| Clock error bound | < 40 µs (AWS PHC) | N/A |
| Collection location | AWS London (Colocated) | Not published |
| Redundancy | 2 WebSocket conn/market, separate networks | Not published |
| Ecosystem | hftbacktest | None |
| Price | $49/mo for full history, personal use license | $360/mo for full history |
Which should you pick?
Execution and liquidity research
PMData
Pick PMData to simulate fills, slippage, and queue position, study liquidity between minutes, or work with individual trades and Chainlink prices.
Minute bars and market metrics
PolymarketData.co
Pick PolymarketData.co for minute-level prices and metrics through a query API, with discovery by series, event, and tag, and history back to August 2025.
Try PMData on your own backtest
The free tier includes 600 file downloads of tick-level L2, trades, and on-chain fills.