Dataset

Historical website snapshots (Wayback Machine)

Free & Open Data API WARC 1 source

A compressed history of the web: billions of pages captured from 1996 to the present, whose CDX API lists every archived URL and timestamp, making it possible to revisit how any company's site, pricing or catalogue looked on a given date.

Dataset card

Historical website snapshots from the Internet Archive's Wayback Machine provide point-in-time crawls of public web pages, accessible via open interfaces and bulk CDX indexes. The dataset is commonly used by analysts who need to reconstruct how online content has changed over time.

What this dataset contains

The dataset consists of archived HTML, image, and other web resources captured by the Internet Archive's web crawler, along with CDX index records that describe each capture. Per-item access terms apply rather than a single blanket license, so downstream use depends on the specific snapshot and its source page. No overall size, row count, or coverage window is stated in the available documentation.

Structure and fields

The underlying CDX index exposes fields such as urlkey, timestamp, original, mimetype, statuscode, digest, and length, which together identify a captured resource and its capture metadata. Bulk CDX files are provided for programmatic retrieval, alongside APIs for fetching individual archived pages. The provider documentation does not enumerate a canonical table schema for end users, and no sample rows were supplied.

How analysts use it

Equity and credit analysts use Wayback snapshots to evidence historical product pages, pricing changes, disclosures, or marketing claims by listed companies, supporting due diligence and forensic research. It is also tapped for competitive-intelligence work, brand-monitoring baselines, and academic studies of online content evolution, typically by querying CDX fields like timestamp and urlkey to target specific pages and dates.

Documentation & references 2
  1. Internet Archive/Historical website snapshots (Wayback Machine): listing on the provider website
  2. Internet Archive: official website

Further reading

All guides
  • How funds evaluate alternative data vendorsEvaluating alternative-data providers: research fit, provenance, historical timing, permitted use and the evidence needed for an informed purchasing decision.
  • Open vs commercial alternative dataWhat free and open datasets can and cannot do: where public data rivals paid panels, where it cannot compete, and how open sources fit a professional research workflow.
  • Alternative data for hedge fundsA practical guide to alternative data for hedge funds: team design, budget sequencing, infrastructure, vendor portfolio construction and the metrics that show whether the program creates investment value.
  • Free alternative data sourcesThe practical list of free alternative-data sources for investors: public filings, official statistics, satellite and earth observation, on-chain data, web archives and open registries, what each covers, what it costs in engineering effort, and where free data falls short.

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