PolyBackTest Alternative for Historical Polymarket Data

PolyBackTest facts from its public pages (verified October 3, 2026); PolyOrderbooks facts from our product docs.Scroll →

Source (PolyBackTest): https://polybacktest.com/polymarket-snapshots-api

PolyBackTest targets one workload: backtesting strategies on Polymarket crypto markets. It captures full bid/ask ladders for Bitcoin and Ethereum Up/Down rounds — 1-minute candles per its homepage, which is a different claim from the sub-second granularity on its enterprise pages — keeps data after markets resolve, and documents point-in-time queries such as the Snapshots API. If your strategy is exactly these markets and full depth is the whole requirement, PolyBackTest is built for that slice — verify its conflicting resolution claims (1-minute on the homepage vs sub-second on enterprise pages) and its self-reported up to 150-day window before committing.

The trade-off is the coverage envelope. Its sampled pages describe a BTC/ETH Up/Down subset and self-report a history window of up to 150 days across 100,000+ markets and 644M+ snapshots — an accumulating archive rather than a backfilled one. The same volume of our archive covers Polymarket crypto markets generally (not only Up/Down rounds) and predates the accumulating window.

Resolution. PolyBackTest's own pages disagree: the homepage says “full historical order book depth at 1-minute resolution,” while the institutional pages describe sub-second snapshot granularity. Capture cadence decides whether your fills can be simulated at the precision you think they can, so this is the first thing to ask for a written answer on. PolyOrderbooks captures every 250ms, with 250ms query resolution on every plan including free, and reconciles ladders against the live book.

History depth. The self-reported up to 150-day window matters more for backtesting than for most workloads, because a long lookback is what separates a strategy test from a recent-market fit. Its enterprise copy claims full historical Polymarket coverage with sub-second granularity; its public pages report 644M+ snapshots across 100,000+ markets. Confirm which is true for the plan you will buy.

Every item below is scoped to the covered BTC/ETH Up/Down subset — a smaller envelope than the ongoing archive described in the next section.

• Backtests scoped to Polymarket BTC/ETH Up/Down crypto rounds
• Full-depth order book preservation after markets resolve
• Point-in-time replay queries over covered timestamps
• Bulk order book dataset downloads for local processing
• A free tier to validate responses before subscribing

If your strategy spans markets beyond Up/Down rounds — or you do not want your history window and capture cadence decided by a provider's plan — PolyOrderbooks captures Polymarket crypto ladders every 250ms and serves them over REST with 250ms query resolution on every plan. Resolved markets stay in the archive, the schema is stable, and a free Starter tier plus a free BTC 5-minute L2 sample let you validate before paying.

The same reconciliation test we run on our own archive is the one worth running on any PolyBackTest sample you are offered: ask for data, check that no book has a bid at or above the best ask, and compare timestamp formats with your existing parser.

If you would rather describe the strategy than write the replay loop, Backtest AI tests a plain-English idea against the same archive and explains every run.