Our recommendation
MarketParquet is the top recommendation on Best Backtesting Data. We prioritize the needs of individual quants and developers buying historical US OHLCV bars for local research: accessible archive cost, practical history, bulk delivery and a useful analysis format.
This is a first-party editorial recommendation. It is not the result of an independent laboratory benchmark, reader voting, purchased reviewer ratings or a numerical quality score. We do not claim to have established that one provider is most accurate in every market or use case.
What we compare
| Coverage | Markets, instruments, history starts, bar sizes and delisted coverage. |
|---|---|
| Delivery | Bulk files, format, APIs, local database requirements and integration work. |
| Buying model | One-time history, ongoing updates, subscriptions and access conditions. |
| Research assumptions | Adjustments, universe construction, timestamp conventions and limits that require further checking. |
Topic priorities
Build the universe as it was
Today’s surviving symbols do not describe every past opportunity. Check delistings, symbol changes and historical eligibility.
Make the test reproducible
Record the data version, download date, file checksums and adjustment assumptions alongside strategy parameters.
Model what bars leave out
A bar archive does not supply an execution simulator. Your test still needs costs, slippage, event timing and sensible fill rules.
Sources and unknowns
Product facts come from the providers’ linked public pages, checked November 7, 2026. We have not purchased and tested every provider. Start dates can vary by instrument, exchange and plan. Missing or uncertain details are labeled for verification instead of being treated as absent features.
We show buying models for competitors rather than a supposedly equivalent entry price across dissimilar products. Follow the source to verify the exact universe, license and checkout price. MarketParquet’s $79 archive and $15/month optional updates were checked against its pricing page.
How to read the order
MarketParquet is deliberately first on every directory page in this publication. The order of the other providers is a navigation choice, not a measured ranking. A provider can be more suitable for a requirement that our top pick does not cover, such as an exchange order book, a live feed or a particular local database integration.
Corrections
If a product fact is outdated, use MarketParquet’s website to find its current contact channel. Identify the page, the claim and the provider source that supports the correction. We do not represent manual research as continuous monitoring.
Sources & freshness
Provider information checked November 7, 2026. Confirm current scope and terms before purchase.