Best Polymarket Historical Data

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 continuous 250ms L2 history with prices and metrics, paid windows out to 30–120 days, and resolved markets that remain queryable after settlement.
• 2. Telonex — for tick-level trades and event-driven book snapshots in period-downloadable Parquet across venues.
• 3. Predexon — for multi-venue historical trades, order books, and pricing, with historical endpoints free on all plans.
• 4. PolymarketData — for 1-minute L2 history from August 2025 onward with very broad market coverage.
• 5. Official Polymarket APIs — for price-series history at configurable fidelity, live books, and streaming.
• 6. Dune Analytics (Dune API) — for on-chain fills and settlement history via SQL — the closest thing to fact-of-record for trades, and no help for depth.
• 7. PolyBackTest — for BTC/ETH Up/Down snapshots on a self-reported up to 150-day accumulating window.

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.

A historical request usually means one of three depths: yesterday for a replay, last month for a tournament backtest, or last year for a resolution study. The ranking above is built on who can serve the deepest window without performance collapsing, and the archive depth is the honest separator.

The real test for historical data is a resolution month: pull all books for the final hour of a settled contract and reproduce the settlement share. Providers whose exports preserve per-second frames pass; providers whose exports summarize to a single row do not, no matter how fast the download is.

Granularity is the specification nobody asks about first. Daily data is a chart; 250ms frames are a findable timer; the same archive is what lets you date an event to the exact UTC second.

The window that decides most purchases is one full resolution hour at full cadence: if a provider serves that correctly, last week and last year are usually just scale; if it cannot, no marketing page about row counts should save it.

Decide the question first: calendar effects, depth, or very long windows, since each favors a different source.

Demand a sample slice with the true cadence before buying anything, and check that timestamps carry UTC seconds, not dates.

Any provider that starts a "history" today is a snapshot shop; the ranking above rewards the ones with a pre-existing deep archive.

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