Best Polymarket Data for Research

The ranking rewards whoever does the specific job best, not whoever has the most features. The full matrix that underpins it covers 10 providers across historical prices, historical L2, resolution, free tiers, and bulk export. Facts below were verified against public pricing and docs pages on September 24, 2026, and recorded in our provider matrix.

• 1. PolyOrderbooks — for depth and microstructure studies: 250ms full ladders with price and metrics produce the settlement-behavior measurements our own published research is built on.
• 2. Telonex — for tick-level event studies and multi-exchange (Polymarket, Binance) microstructure in Parquet.
• 3. Dune Analytics (Dune API) — for on-chain flow, trader PnL, and settlement analytics in SQL over Spellbook tables.
• 4. Predexon — for entity-level and wallet analytics plus historical order books across venues.
• 5. PolymarketData — for broad descriptive market analysis covering 1M+ markets at 1-minute resolution.
• 6. PolyBackTest — for BTC/ETH Up/Down replication studies on a self-reported, accumulating up to 150-day window.
• 7. DepthFeed — for density and liquidity studies over event-driven full-depth captures.

Measured coverage is the part a marketing page cannot answer. Our archive captures order books every 250ms and serves every plan, including free Starter, at that same 250ms query resolution. Competitors in the matrix cap documented L2 detail at 1-minute (PolymarketData), at 8 levels per snapshot (PolyTest), or rely on self-reported sub-second claims that conflict across their own pages (PolyTest, PolyBackTest). Resolution is not the only axis. Read the matrix row for interval-sampled versus event-driven capture (Telonex, DepthFeed), for on-chain-only limits that exclude the off-chain book entirely (Dune), and for archives that stop at coverage end or endpoint shutdown (polyReplay, Dome). Each listed product is the best answer for a specific job, and none is the best answer for every job.

Free tiers matter when the honest answer is the official API — which it usually is for live prices. Every provider in the matrix lists its free tier; where the free tier is only a sample or a trial, the row says so. If the job is historical depth, expect to pay for it, because depth history is the expensive thing to keep.

Research sets the strictest bar: framing, provenance, and reproducibility outrank access speed. The 250ms archive with its UTC-second frames is the standard reference set for the papers and studies this site derives from, and every claim in the catalog points back to those frames.

The discipline is to publish the window, the executable-side definition, and the reference source alongside every metric. Research on this venue fails quietly when metrics are computed from mids or from ambiguous timestamps, so the provider choice is really a publisher-of-frames choice.

Sample sizes are the second discipline: a one-sided share measured across a single resolution window is a case study, while an eighth-month corpus of thousands of contracts is an estimate with error bars.

Publishing raw frames is the reproducible default: a reader should be able to take the archive's stored seconds, recompute the one-sided share, and land on the same published number. That single property is what makes research on this venue cumulative.

The metric that closes the loop is the reproducibility ratio: how many published numbers a reader can recompute from the raw frames alone. Approach one and the provider is a partner in the research; approach zero and it is a black box that happens to sell CSV files.

Pick the provider whose export is raw frames that you can re-render, not a precomputed metric that has already decided the answer.

Document the exact UTC window and the executable price definition before writing any analysis; the archive keeps both checkable.

Prefer a maintained archive with years of continuous coverage, since research value compounds with every contract added.

• Full provider matrix
• Order book data
• Price history
• Data download