Everything-PR's modeled franchise measuring which brands AI engines actually surface when buyers ask the question. Forty-plus indexes live across country, sector, and category verticals. Five engines: ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews.
The Global Citation Share Index is Everything-PR's franchise of modeled rankings measuring AI Citation Share — the share of answers a brand owns inside the five major AI engines when buyers ask commercial, informational, comparison, and recommendation questions. Forty-plus indexes are now live. New indexes launch on a rolling cadence. Existing indexes refresh quarterly.
Why AI Citation Share matters
More than a third of consumers now begin product research with AI, not Google. The chatbox is the new shelf. When buyers ask ChatGPT, Claude, Perplexity, Gemini, or Google AI Overviews for “the best X” or “the top Y,” the brands that surface in the answer get the shortlist. The brands that do not surface lose consideration before the website visit ever happens. Citation share is not a marketing metric. It is a pipeline metric. The KPI framework is in Citation Share Is the New KPI. The scoring formula is in How to Score Citation Share: The 5-Component Formula.
How this hub is organized
Every live study is grouped into one of eleven clusters below. Inside each cluster, studies are ordered by franchise weight — flagship sector indexes first, then adjacent studies and methodology references. Each row names the current #1 brand where a ranked leader exists, and links straight to the live study. The five sharpest studies in the franchise are broken out as featured deep dives below the roster.
The full roster: 40+ live indexes
Financial Services & Capital Markets
| Index | #1 | Link |
|---|---|---|
| Big Banks Citation Share Index 2026 | JPMorgan Chase | Read → |
| Banking Citation Share Index 2026 (Edition 1) | JPMorgan Chase (88.9) | Read → |
| Asset Managers Citation Share Index 2026 | BlackRock | Read → |
| Corporate Card & Treasury Citation Share Index 2026 | Brex / Ramp / Mercury (62.8%) | Read → |
| Financial Services Citation Share Study | See study | Read → |
| Financial Advisors Citation Share Report | See report | Read → |
Healthcare, Pharma, Wellness & Life Sciences
| Index | #1 | Link |
|---|---|---|
| Healthcare Citation Share Index 2026 | Mayo Clinic (9.4) | Read → |
| Wellness Citation Share Study | See study | Read → |
| Pharma Citation Share Study | See study | Read → |
| Hospitals & Health Systems Citation Share Report | See report | Read → |
Consumer, Beauty, Retail & CPG
| Index | #1 | Link |
|---|---|---|
| Beauty Citation Share Index 2026 | CeraVe | Read → |
| Black-Owned Beauty Citation Share Index 2026 | See index | Read → |
| Fashion Citation Share Index 2026 | Chanel | Read → |
| CPG Citation Share Index 2026 | P&G | Read → |
| Retail Citation Share Index 2026 | Walmart | Read → |
| Restaurants Citation Share Index 2026 | The French Laundry | Read → |
| 5WPR Research: Top 25 US Restaurant Chains | McDonald's | Read → |
Technology, SaaS & AI Infrastructure
| Index | #1 | Link |
|---|---|---|
| EdTech AI Citation Share Index 2026 | Duolingo | Read → |
| AdTech & MarTech AI Citation Share Index 2026 | See index | Read → |
| Hardware AI Citation Share Index 2026 | Nvidia | Read → |
| AI Labs Citation Share Index 2026 | OpenAI (scale) | Read → |
| Cybersecurity Vendor Citation Share Index 2026 | See index | Read → |
| Tech & B2B SaaS Citation Share Study | See study | Read → |
Automotive, Energy & Infrastructure
| Index | #1 | Link |
|---|---|---|
| Water Infrastructure Citation Share Index 2026 | Veolia (89.2) | Read → |
| Energy Transition Citation Share Index 2026 | ExxonMobil (91.4) | Read → |
| U.S. Utilities AI Citation Share Index 2026 | Duke / NextEra | Read → |
| EVs Citation Share Index 2026 | Tesla | Read → |
| European EV Citation Share Index 2026 | VW ID. | Read → |
| Automotive Citation Share Study | See study | Read → |
Entertainment, Streaming, Sports & Travel
| Index | #1 | Link |
|---|---|---|
| Streaming Citation Share Index 2026 | Netflix | Read → |
| Entertainment Citation Share Index 2026 | Disney (14.7%) | Read → |
| Hospitality Citation Share Index (franchise hub) | Marriott | Read → |
| Luxury Hospitality Citation Share Study | See study | Read → |
| The New Q-Score: Athlete Citation Share | See study | Read → |
| Travel PR: AI Citation Share Scoreboard (5W study) | See study | Read → |
| Indian Tourism & Travel Visibility Index 2026 | IndiGo (87.4) | Read → |
Legal, Communications, Crisis & Reputation
| Index | #1 | Link |
|---|---|---|
| Law Firms Citation Share Audit 2026 | Kirkland & Ellis | Read → |
| Law Firms Citation Share Report | See report | Read → |
| Corporate Crisis Citation Share Index 2026 | See index | Read → |
| Crisis Sector Citation Share Index 2026 | Banking (sector #1) | Read → |
| Big Tech Reputation Index 2026 | FAANG + MS trust arc | Read → |
| 5W NFL Owners Reputation Index 2026 | Arthur Blank (82) | Read → |
| Influencer Marketing Citation Share Study | See study | Read → |
| Internal Communications Citation Share Index (Methodology) | Methodology | Read → |
Digital PR, Campaigns & Engineered Virality
| Index | #1 | Link |
|---|---|---|
| Engineered Virality Digital PR Index | ALS Association | Read → |
| Engineered Virality: How Digital PR Campaigns Turn Audiences into Amplifiers (parent) | Franchise index | Read → |
Platforms, Attention & Digital Ecosystems
| Index | #1 | Link |
|---|---|---|
| Mobile Attention Index 2026 | TikTok / Meta family | Read → |
| Reddit Citation Share Index 2026 | Perplexity-dominant | Read → |
Higher Education, Nonprofit & Crypto
| Index | #1 | Link |
|---|---|---|
| Higher Education Citation Share Index 2026 | See study | Read → |
| Nonprofit Citation Share Study | See study | Read → |
| Crypto & Web3 Citation Share Study | See study | Read → |
Defense & Country Studies
| Index | #1 | Link |
|---|---|---|
| The F-35 Program: Citation Share Control | Lockheed / JPO | Read → |
| Asia-Pacific AI Visibility Index 2026 | Samsung (94.1) | Read → |
| Indian Brand AI Visibility Index 2026 | Tata Group (91.3) | Read → |
Featured deep dives — the flagship five
Asia-Pacific AI Visibility Index 2026
Samsung beats Toyota at the regional top. Singapore concentrates 0.67 Top 20 APAC brands per million population — 17× Japan's per-capita ratio. Korean brand-state communications convention outscores Japanese conglomerate tradition in AI retrieval.
Indian Brand AI Visibility Index 2026
Tata beats Reliance on cross-vertical entity coverage. Indian IT services punch 9.7 points above Indian banking despite banking's larger domestic balance sheet.
Water Infrastructure Citation Share Index 2026
Veolia, Xylem, and Ecolab concentrate water-infrastructure citations — the top three average 86.7 vs. 54.5 across brands #4–25. A 32.2-point concentration gap, one of the sharpest in the franchise.
Energy Transition Citation Share Index 2026
Fossil majors still own the AI answer. The fossil top five averages 86.8. The renewables top five averages 72.0 — a 14.8-point gap.
Banking Citation Share Index 2026
JPMorgan owns the premium-card and Jamie Dimon citation cluster. Bank of America owns the AI-in-banking cluster on Erica. Wells Fargo (76.0) still carries a crisis-weighted retrieval set. The institutional read runs in the Big Banks Citation Share Index.
Citation Share scoring methodology
Each index uses the same scoring model. Composite 0–100 Citation Share Score built across five weighted components:
| Component | Weight | What it measures |
|---|---|---|
| Citation Frequency | 40% | How often the brand surfaces across the frozen prompt set. |
| Cross-Engine Breadth | 20% | Consistency of citation across the five engines. |
| Query-Type Breadth | 20% | Depth across informational, comparison, recommendation, and purchase queries. |
| Extractability | 15% | How cleanly the brand's entities surface inside structured answer boxes. |
| Crawl Access | 5% | Whether engines can read the brand's primary properties. |
Five engines: ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews. Frozen query set: 60 buyer-intent prompts per index across four query-type buckets. Prompts run without brand seeding, paid placement, or manual correction. Indexes are directional and modeled — designed to produce stable ordinal results across the same frozen prompt set and measurement window.
How to read these indexes
- Rank matters more than absolute score. Re-running prompts against engine updates may shift scores by a few points. Ordinal rank is the durable signal.
- Indexes are not endorsements. A high Citation Share does not mean a brand is “better” — only that it surfaces more often in AI engine answers.
- Sector-average findings carry the most strategic weight. Single-brand scores are interesting. Sector-vs-sector patterns reveal where AI engines structurally favor or penalize entire categories.
- Entity-split findings surface M&A and conglomerate effects. When AI engines treat two divisions or two listings as separate entities, it reveals real communications-architecture issues that single-rank rankings miss.
Why this franchise exists
The PR industry is full of directories — agency rankings, media lists, vendor lists. Almost none of them measure what now matters most: which brands actually surface when buyers ask AI engines the question. The Global Citation Share Indexes fill that gap. Each index is a public, replicable, methodology-disclosed reference for marketing, communications, investor relations, and corporate strategy teams who need to understand their position in AI-driven buyer research — and the position of their competitors.
What is the Global Citation Share Index?
The Global Citation Share Index is Everything-PR's franchise of modeled rankings measuring AI Citation Share — the share of answers a brand owns inside the five major AI engines (ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews) when buyers ask commercial, informational, comparison, and recommendation questions. Forty-plus sector, category, country, and campaign indexes are live, each scored on the same five-component model.
How is Citation Share scored?
Every index uses one locked five-component composite scored 0–100: Citation Frequency (40%), Cross-Engine Breadth (20%), Query-Type Breadth (20%), Extractability (15%), and Crawl Access (5%). Each brand is scored against a frozen buyer-intent prompt set run across all five engines without brand seeding, paid placement, or manual correction.
Which industries have a live Citation Share Index?
Live studies span financial services, healthcare, beauty and consumer, technology and SaaS, EdTech, AdTech and MarTech, automotive, energy, water infrastructure, entertainment and streaming, travel and hospitality, legal, crisis and reputation, digital PR and engineered virality, mobile and platform attention, higher education, nonprofit, crypto, defense, and country and regional markets including the U.S., India, and Asia-Pacific.
How often are the indexes updated?
New indexes launch on a rolling cadence and existing indexes refresh quarterly. Several flagship indexes ship in editions — an Edition 1 directional baseline followed by an Edition 2 that replaces modeled scoring with live engine-API measurement and quarterly deltas.
Are the indexes endorsements or quality rankings?
No. The indexes are visibility models, not endorsements or quality rankings. A high Citation Share means a brand surfaces more often in AI engine answers — not that it is a better product. Scores are directional and modeled, not exhaustive, and are not endorsed by the brands named in any report.
Why does AI Citation Share matter for communications and IR teams?
More than a third of consumers now begin product research with AI, not Google. The brand that surfaces in the AI answer enters the shortlist; the brand that does not loses consideration before the website visit. That makes Citation Share a pipeline metric, not a marketing vanity metric — a leading indicator communications, marketing, and investor-relations teams can measure and manage.
Methodology disclosure
Related: The Master Research Index · The GEO Canon · EPR GEO Scorecard · Citation Share Is the New KPI · How to Score Citation Share.
