Data infrastructure / open access
Public data catalog
Download the records behind the research, including market shares, concentration measures, official events, and source references. Coverage and missing values are documented for each dataset.
Source records move through market definitions, concentration calculations, confidence labels, and public data endpoints — 45 source records, 12 market profiles, 235808 record rows plus a 1 row summary endpoint across 62 API endpoints.
Record rows
235,808
Sources
45
Endpoints
62
Aug 15, 2026
Latest source review
62
Dataset families
4
Source types
Market-definition atlas
What market is this metric measuring?
Inspect each product boundary, geography, denominator, proxy choice, and permitted comparison use before treating concentration values as economic evidence.
Selected definition contract
U.S. search engine usage
Product boundary
All-platform search engine usage
Geographic boundary
United States
Measurement basis
StatCounter search engine referral usage share
Denominator
Observed U.S. search engine usage in each reported monthly snapshot
Included
Named search engines and a residual Other category that closes the public share table to 100 percent
Excluded
Search query volume, search advertising revenue, and other digital advertising activity
Method and limitations
Compute HHI from the same StatCounter all-platform U.S. usage-share series and retain the residual Other category.
Usage share is a web-analytics proxy and should not be presented as search-query share or search-advertising revenue share.
Boundary source
Search engine market share in United States of America, April 2023-April 2026
StatCounter Global Stats · accessed 2026-07-17
Open data needs public interpretation.
The API is a starting point, not a legal conclusion. Pair downloads with methodology notes, source records, and the data-gaps report when citing market concentration.