Economic observatory / digital systems

Digital Platform Systems

Explore separate histories of search referrals, browser use, mobile operating systems, social referrals, and AI assistant use. Different denominators prevent a combined ecosystem market-share score.

System field2026

01Search engines7,359HHIGoogle Search85.2%02Browsers3,612HHIChrome50.0%03Mobile operating systems5,337HHIiOS63.1%04Social referrals4,995HHIFacebook68.9%05AI assistants4,804HHIChatGPT67.1%

Evidence systems: 5
HHI anchors: 17
Share rows: 146
Attributed operators: 20
Measurement sources: 5

Public web-analytics screensExact same-month anchorsDefinition-aware HHIOfficial product attributionNo combined platform-power measure

Bounded platform evidence

Search referrals

1 system / 4 HHI anchors / 28 exact share rows

Evidence system

Systems: 1
HHI anchors: 4
Share rows: 28
Operators: 6
Sources: 1

Research surface

U.S. search engine usage

Observed concentration histories

A common HHI scale, never a common market.

Blank cells are gaps. Every value opens through its own definition and source.

Evidence systemSame-month anchors where available

2023April

2024April

2025April

2026April

7,950first anchor

7,575-375 HHI

7,589+14 HHI

7,359-230 HHI

Search referrals

U.S. search engine usage

All-platform U.S. search engine usage share from StatCounter Global Stats for April 2026. The market is an observed usage-share proxy, not search advertising revenue.

Latest HHI: 7,359
Anchors: 4
Categories: 7

Common 0-10,000 HHI axis / separate evidence contract

Google Search202685.16%-3.72 pp Bing20269.82%+3.39 pp Yahoo Search20262.67%+0.34 pp DuckDuckGo20261.74%-0.24 pp Yandex20260.38%+0.23 pp Other search engines20260.12%-0.04 pp Ecosia20260.11%+0.04 pp

Measurement source custody

1 public measurement source

Operator-attribution sources stay in the matrix and exported packet; they are not substituted for measurement sources.

No ecosystem score.These five screens do not define one digital-platform market. Each keeps its own product boundary, page-view or referral denominator, participant categories, month, and permitted use. HHI values are never added, averaged, ranked into an ecosystem score, or treated as evidence of conduct.