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

Five systems, one research surface

5 systems / 17 HHI anchors / 146 exact share rows

Evidence system

Systems: 5
HHI anchors: 17
Share rows: 146
Operators: 20
Sources: 5

Research surface

Complete digital-platform packet

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

3,664first anchor

3,846+182 HHI

3,720-126 HHI

3,612-108 HHI

5,157first anchor

5,055-102 HHI

5,094+39 HHI

5,337+243 HHI

3,393first anchor

2,838-555 HHI

3,804+966 HHI

4,995+1,191 HHI

Gap

4,804first anchor

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

Browser page views

U.S. browser usage

All-platform U.S. browser usage share from StatCounter Global Stats for April 2026. The profile tracks browser usage concentration, not browser advertising or operating-system tying questions.

Latest HHI: 3,612
Anchors: 4
Categories: 7

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

Chrome202650.03%+1.41 pp Safari202631.86%-2.82 pp Edge20268.12%-0.33 pp Firefox20263.75%+0.36 pp Brave20262.69%+2.69 pp Other browsers20262.11%-1.43 pp Samsung Internet20261.44%+0.12 pp

Mobile OS page views

U.S. mobile operating-system web usage

Mobile operating-system concentration based on the operating systems detected in U.S. mobile page views measured by StatCounter in April 2023-April 2026. The series is a public web-usage proxy rather than device sales, installed base, app-store activity, or operating-system revenue.

Latest HHI: 5,337
Anchors: 4
Categories: 9

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

iOS202663.08%+3.19 pp Android202636.85%-2.78 pp Samsung20260.05%-0.23 pp KaiOS20260.02%+0.01 pp Linux20260.00%-0.02 pp Other mobile operating systems20260.00%-0.03 pp SymbianOS20260.00%-0.04 pp

2 smaller source categories remain in the exact ledger.

Social referrals

Social-platform concentration based on U.S. page views referred from social-media sites to StatCounter-tracked websites in April 2023-April 2026. The series measures outbound referral traffic, not platform users, time spent, advertising revenue, engagement, or an antitrust market.

Latest HHI: 4,995
Anchors: 4
Categories: 12

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

Facebook202668.94%+16.99 pp Twitter / X202611.63%-7.84 pp Pinterest20267.53%-3.93 pp Instagram20266.28%-7.1 pp Reddit20262.35%+1.39 pp YouTube20262.33%+0.47 pp LinkedIn20260.40%-0.09 pp

5 smaller source categories remain in the exact ledger.

AI assistant usage

U.S. generative AI assistant usage

Consumer generative AI assistant usage concentration from StatCounter Global Stats for May 2026. The market tracks which AI chatbots people use across StatCounter-tracked assistants, an observed usage-share proxy rather than revenue, total user counts, or the broader AI supply chain of chips and cloud.

Latest HHI: 4,804
Anchors: 1
Categories: 6

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

ChatGPT202667.13%snapshot Google Gemini202610.86%snapshot Microsoft Copilot202610.79%snapshot Claude20265.99%snapshot Perplexity20265.18%snapshot DeepSeek20260.05%snapshot

Measurement source custody

5 public measurement sources

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.