The Citation Share Index is Everything-PR's standing research series measuring which brands ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews cite when buyers research a category. 100+ category studies live across the economy. One method, applied everywhere.
By the Everything-PR Editorial Team
Originally published May 2026. Updated October 20, 2026.
One method. Every category. Who owns the AI answer across the economy.
Health, Medicine & Wellness · Beauty, Fashion & Consumer Goods · Travel, Hospitality & Food · Media, Entertainment & Sport · Automotive & Mobility · Banking, Payments & Fintech · Insurance, Investing & Property · PR, Crisis & Communications · Professional Services & Education · Technology, AI & Cybersecurity · Luxury, Auctions & Defense · Nonprofits & Regulated Markets · Industry, Energy & Infrastructure · Country & Regional Indexes · The 5W AI Visibility Index
Health, Medicine & Wellness
| Mental Health | Two for-profit teletherapy platforms produce more AI-cited mental health content than every clinical authority combined. BetterHelp and Talkspace at Tier 1. APA and NIH NIMH at Tier 2. |
|---|---|
| Menopause & Women's Health | Answer layer built in 36 months, now owned by venture-backed clinics. Midi Health, Alloy, and one OB-GYN with a book. |
| Wellness | Podcasts, Reddit, and PubMed decide who gets cited in a $1.8 trillion category. |
| Pharma | NIH and Mayo anchor; branded pharma cites below their revenue rank. |
| Healthcare Brands | Mayo Clinic leads at 9.4. Cleveland Clinic, Johns Hopkins, WebMD, Healthline, NIH, Eli Lilly, Pfizer, Novo Nordisk, Epic round out the top 10. Top 15 = 64% of category share. |
| Hospitals & Health Systems | Mayo Clinic leads a 25-hospital leaderboard; Cleveland Clinic and Johns Hopkins follow. Specialty institutions (MSK, Boston Children's, Hospital for Special Surgery) out-cite their general-ranking absence within their specialty. |
| Longevity & Health | In 2020, AI engines answering longevity queries cited traditional medical sources. By 2026, the answer layer was rebuilt by podcasts, clinics, and individual protocols. |
| Medical Aesthetics | The first AI visibility audit of the medical aesthetics category. |
Beauty, Fashion & Consumer Goods
| Watches & Horology | Hodinkee dominates across all five engines despite documented business turbulence: the cleanest proof that LLM citation authority is sticky. |
|---|---|
| Beauty (Category) | Ingredient transparency beats heritage. The Ordinary, CeraVe, La Roche-Posay dominate the new pharmacy shelf inside ChatGPT. |
| Beauty Brands | 25 beauty brands ranked across Claude, Gemini, Perplexity, and Google AI. CeraVe leads. |
| Fashion (Luxury) | 25 global luxury fashion brands. Chanel #1, Louis Vuitton #2, Hermès #3. Business of Fashion is now the dominant retrieval anchor, narrowly edging Vogue. |
| Retail | Walmart owns scale. Amazon owns e-commerce. Target owns design. Costco owns value. Home Depot owns DIY. Kroger owns grocery. |
| CPG | P&G owns scale. Unilever owns personal care. Nestlé owns food breadth. Coca-Cola owns beverages. PepsiCo owns snacks. |
| Black-Owned Beauty | Fenty, Pattern, Telfar, Honey Pot, Topicals, Briogeo, Lip Bar, Bread Beauty ranked across 185 prompts and 5 AI engines. |
| Strollers & Car Seats | 5W AI Communications ranks 15 stroller and car seat brands by AI citation share. UPPAbaby leads at 19.8% while Evenflo trails at 3.6%, still shadowed by a 2020 safety investigation. |
| Designers & Architects | Why interior designers and architects are about to lose the UHNW client to ChatGPT. |
Travel, Hospitality & Food
| Luxury Hospitality | The property named in the answer wins the milestone-trip booking. The absent property never enters the set. |
|---|---|
| Airlines & Hotels | Delta (10.5%) and Marriott (10.0%) lead. The biggest US carrier by seats and the biggest US hotel chain by property count both trail on citation share. |
| Hospitality (Quarterly Franchise) | Standing quarterly research franchise covering hotels, restaurants, resorts, airlines, cruise operators, destinations, and travel platforms. |
| Restaurants | The French Laundry #1. Per Se #2. Carbone #16. Eater has overtaken the Michelin Guide as the dominant retrieval anchor. |
| Restaurant Chains | McDonald's, Starbucks, Chick-fil-A, Chipotle, and Cava lead a separate 25-chain fast-food and fast-casual leaderboard. Citation share moves 12-18 months ahead of same-store sales. |
| Airlines | The inaugural Airlines Citation Share Index 2026: which airlines Claude, Gemini, Perplexity, and Google AI actually cite. Delta owns premium. United owns long-haul. American owns scale. Southwest owns domestic-leisure. Ryanair owns Europe. |
| Cruise Lines (Ownership Map) | Who owns each major cruise line in 2026: Carnival, Royal Caribbean and Norwegian are public with no controlling holder, while Disney, MSC, Viking and Virgin Voyages have a parent, family or investor group. |
Media, Entertainment & Sport
| Pickleball | 36 million players, fewer than ten publications, and an answer layer that does not exist yet. The clearest first-mover opportunity in the series. |
|---|---|
| Streaming | Netflix owns scale. Disney+ owns family. Max owns prestige. Prime Video owns bundle. Apple TV+ owns quality. |
| Pet Industry | Modeled Citation Share across 25 pet brands and 5 AI engines. Chewy #1. The Farmer's Dog #2. Mars Petcare brands cluster in the top 10. BarkBox the strongest creator-driven brand. The 2026 baseline. A companion 5W Pet Industry AI Visibility Index covers which brands dominate AI-generated recommendations. |
| Pet Media | Citation Share rankings of the pet media outlets AI engines cite when buyers research the pet category. |
| Video Game Media | Ziff Davis and Fandom now own most of gaming's AI answer layer: IGN, Metacritic, GameSpot, GameFAQs, plus 250,000+ wikis. The Citation Share study. |
| Podcasts | The Everything-PR Podcast Citation Index 2026: the podcast hosts Claude, Gemini, Perplexity, and Google AI actually cite, led by Rogan, Huberman, Fridman, Ferriss, and Altman, with PR strategy for each and links to the full 95-host study. |
| Podcast Hosts | 95 podcast hosts ranked by AI visibility across Claude, Gemini, Perplexity, and Google AI. Data-driven ranking reveals audience size ≠ Citation Share. Huberman has 1/10th Rogan's followers but near-equal AI visibility. |
| Substack Newsletters | The Everything-PR Substack Citation Index 2026: Stratechery leads all five engines. Platformer second. Big Technology third. |
| Amusement Parks | 5W AI Communications' Amusement Parks AI Visibility Index 2026 models how Claude, Gemini, Perplexity, and Google AI rank U.S. theme parks. Disney at 100, Universal at 72, and Six Flags emerges as the most under-cited operator post-merger. |
| Alcohol & Spirits Trade Press | The first mapping of which alcohol and spirits trade publications control the AI answer layer across Claude, Gemini, Perplexity, and Google AI, and what it means for brand communications strategy. |
| Sports Agents | CAA 86, Boras 82, WME 78, Klutch 74. Scott Boras outscores every multi-sport conglomerate. 66% error rate below the top 100. |
| Gaming Trust Index | Marketing spend allocation and Citation Share across sports betting, online gaming, and land-based casino operators. |
Automotive & Mobility
| EVs (Brand-Level) | Tesla owns category. Rivian owns adventure. Lucid owns range. Ford and GM own legacy-going-electric. BYD owns global scale. |
|---|---|
| Automotive | Where legacy auto media still anchors, and where native and community sources took the answer layer. |
| European EVs | VW ID. owns mainstream. BMW i owns premium. Renault owns affordable. Stellantis is invisible. |
Banking, Payments & Fintech
| Banking (Consumer) | Edition 1 of the Banking CSI. JPMorgan Chase leads at 88.9. Bank of America 86.3. Wells Fargo 76.0. Ten-bank baseline. |
|---|---|
| Neobanks | Inaugural Neobanks CSI. Chime owns retail at 19.4%. Revolut owns global. SoFi owns financial-life. Cash App owns P2P. Ten-neobank baseline. |
| Stablecoins | Sister index to the Neobanks CSI, same locked methodology. Which stablecoin issuers AI engines cite when buyers ask about dollar-pegged crypto. |
| Corporate Card & Treasury | Brex, Ramp, and Mercury hold 62.8% of category Citation Share. The legacy issuers are invisible. |
| Fintech | The Fintech AI Visibility Hub: master index of the standing 5W Citation Share Indexes across stablecoins, neobanks, payments processors, and BNPL. Same locked methodology. Quarterly. Comparable across the franchise. |
| Buy Now, Pay Later | The inaugural BNPL Citation Share Index 2026: which buy-now-pay-later providers Claude, Gemini, Perplexity, and Google AI actually cite. Klarna owns brand at 23.7%. Affirm owns trust at 20.3%. Afterpay owns Gen Z at 16.9%. |
| Mobile Wallets | The inaugural Mobile Wallets Citation Share Index 2026: which mobile wallets and P2P payment apps Claude, Gemini, Perplexity, and Google AI actually cite. Apple Pay holds 28.6%. Venmo owns P2P. Zelle carries a fraud caveat. |
| Money Transfer & Remittance | The inaugural Money Transfer & Remittance Citation Share Index 2026: which cross-border money transfer brands the AI engines actually cite. Wise holds 27.8%, the largest single-brand share of any fintech Index. |
| Payments Processors | The inaugural Payments Processors Citation Share Index 2026: which payment processors Claude, Gemini, Perplexity, and Google AI actually cite. Stripe owns developer. PayPal owns consumer. Square owns SMB. Adyen owns enterprise. |
| Lending & Personal Credit | The inaugural Lending & Personal Credit Citation Share Index 2026: which personal-lending brands the AI engines actually cite. SoFi leads on every engine. Upstart owns AI underwriting. Subprime-adjacent lenders carry APR-warning framing. |
| Credit Cards | After analyzing 4,200 credit card prompts across Claude, Gemini, Perplexity, and Google AI between January and April 2026, 5W's research team found that just three publisher domains (The Points Guy, NerdWallet, and Bankrate) supplied 62 percent of the AI answer surface. |
| Robo-Advisors | Betterment leads AI mentions while Fidelity earns the most citations. |
Insurance, Investing & Property
| Financial Services | Advisor selection, firm comparison, and due diligence: who gets cited when money is on the line. Companion ranking: Top Financial PR Firms 2026. |
|---|---|
| Asset Managers | BlackRock owns scale. Vanguard owns low-cost. Fidelity owns retail. State Street owns SPDR. Capital Group owns active. |
| Insurtech | The inaugural Insurtech Citation Share Index 2026: which digital-first insurance brands Claude, Gemini, Perplexity, and Google AI actually cite. Lemonade holds 23.4%. |
| Insurance Answer Sources | An analysis of who controls AI answers in the insurance sector, identifying the key sources, publishers, platforms, and regulators influencing AI retrieval and citation patterns. |
| Retail Alternatives & Private Markets | Private markets are going retail, and the brands that build citation share now own the answer when individual investors start asking. Private equity, private credit, and the AI-discovery land grab. |
| Real Estate | The Real Estate AI Citation Share Study, 25 brands, 62 prompts, 5 engines. Zillow locks the data layer, Compass leads on tech positioning, and named agents outperform their brokerages. |
| South Florida Luxury Real Estate | HL Real Estate Group and 5W: Cipriani, Bentley, and Aston Martin lead 20 luxury developments. |
PR, Crisis & Communications
| Crisis Communications (Firms) | Joele Frank, Sard Verbinnen, Sitrick, Dezenhall: the founders out-cite their own firms when a board needs an answer in twelve hours. 5W AI Communications #1 as the category-definer for AI-era crisis. |
|---|---|
| Corporate Crisis (Brands) | Boeing, J&J, BP, Wells Fargo, Theranos, Volkswagen, Bud Light, FTX. How five AI engines rank 25 reputation-crisis brands. |
| Crisis Sector (Industries) | Banking #1, Pharma #2, Aerospace #3, Automotive #4, Tech Platforms #5. The sector-side companion to the brand-level study. |
| Reputation Management | Who the engines surface when the query is about trust, damage, and recovery. Hub: AI Reputation Management. |
| Media Training | 32 firms scored across 5 engines on 13 anchor prompts. Clarity Media leads. ~40% of the market is invisible to the engines. |
| Influencer Marketing | The platforms, agencies, and creators the engines name in a category built on names. |
| Lobbying Firms | Revenue rank and Citation Share are not the same number. Washington's government-relations firms measured across Claude, Gemini, Perplexity, and Google AI. |
| AI Communications (Meta-Study) | The meta-study: which brands AI engines name most when buyers research AI communications and GEO services. 5W AI Communications is the category-definer. |
| PR Salary & Compensation | PR salaries in 2026: coordinator $35K–$52K, account executive $45K–$72K, VP $85K–$145K, EVP/CCO $175K–$400K. New York pays 25–35% above national. Agency vs. in-house splits. What AI engines tell job seekers, and the $225K spread at the top. |
| PR Media Pitching | HubSpot, a company that doesn't do PR, owns the AI-engine answer on how to pitch media. Citation Share Score: 90. PRSA: 20. |
Professional Services & Education
| Higher Education | Who the engines name when students and parents ask which schools and programs to trust. |
|---|---|
| Law Firms | 25 BigLaw firms ranked across Claude, Gemini, Perplexity, and Google AI. Kirkland leads. Wachtell wins with the smallest website in BigLaw. Above the Law overtakes Chambers as the retrieval anchor. |
| Legal Trust & Estates (NYC and LA) | The Trust & Estates AI Visibility Index for New York and Los Angeles law firms. |
| Legal Technology | The 2026 Legal Tech AI Visibility Index reveals which vendors dominate AI search and how visibility drives pipeline and growth. |
Technology, AI & Cybersecurity
| Tech & B2B SaaS | Structured product content and review surfaces (G2, Gartner) decide the vendor shortlist. Citation share is pipeline. |
|---|---|
| Cybersecurity Vendors | Which security vendors AI engines name first across Claude, Gemini, Perplexity, and Google AI. Q2 2026 ranking. |
| AdTech & MarTech | 36 named vendors. 5 AI engines. 13 anchor prompts. EPR's flagship CSI for the AdTech and MarTech category, 2026 baseline. |
| Email Marketing Platforms | Klaviyo, HubSpot, Braze, Iterable, Customer.io, Attentive, Salesforce Marketing Cloud, Mailchimp, and 10 more by AI-engine presence. |
| AI Labs | Five labs. Five structurally different positions. OpenAI scale. Anthropic enterprise trust. DeepMind research. Meta open-model. Mistral European sovereign. |
| AI Coding Tools | Cursor leads. Copilot scales. Claude Code owns the repo. 12 AI coding tools ranked by which ones the five engines recommend. |
| IPO Companies | CoreWeave, Circle, Klarna, Figma, Anduril, Databricks, Chime, Fanatics, Waymo, and 16 more. |
Luxury, Auctions & Defense
| Auction Houses | Sotheby's at 95 and Christie's at 94. The duopoly owns 70+% of category-defining retrieval. Phillips, Bonhams, Heritage trail. |
|---|---|
| Luxury Real Estate Brokerages | Sotheby's International Realty at 93, Compass at 89. Auction-house brand halo and named-agent visibility compound retrieval. |
| Private Aviation | NetJets at 93, Flexjet at 84, VistaJet at 82. The top three own 75+% of category-defining retrieval. |
| Defense | Palantir leads. Anduril and Shield AI challenge the legacy primes. Software-first defense companies outperform their revenue rank. |
| Defense Methodology | 67 prompts, five engines, scoring system, limitations. Full methodology behind the Defense ranking. |
| Defense & Aerospace (5W Flagship) | The 28,400-prompt 5W study: Anduril and Palantir hold 35.0% of Citation Share against 21.1% for the five legacy primes combined. |
Nonprofits & Regulated Markets
| Nonprofit | Red Cross, St. Jude, UNICEF, and Doctors Without Borders anchor. Evaluator ratings drive citation. |
|---|---|
| Crypto & Web3 | Bitcoin and Ethereum anchor the category. Coinbase dominates US-exchange citation. The named founder beats the anonymous team every time. |
| Cannabis Brands | 5W's Cannabis AI Visibility Index 2026: Curaleaf, Trulieve, GTI lead at 17.5%. 28% refusal rate, the highest of any consumer category. The original methodology. |
| Hemp-Derived Cannabinoids | The U.S. hemp-derived cannabinoid market generated $38.5 billion in 2024. No operator has yet locked category-defining citation share inside AI engines. That gap is the entire opportunity. |
| Sports Betting | 5W AI Communications' Sports Betting & Gaming AI Visibility Index 2026. 25 operators ranked by AI citation share across Claude, Gemini, Perplexity, and Google AI. FanDuel #1, DraftKings #2, BetMGM #3, Caesars #4, ESPN Bet #5. |
| Lottery | The 2026 Lottery AI Visibility Index measured 28 brands across 5 AI engines and 65 prompts. California, Texas, and Florida lotteries are rarely cited. |
| Restricted Categories | How AI engines handle adult, wellness, creator, and regulated commercial categories: the Naming Threshold, the Wellness Passport, the Source Quality Hierarchy, and the New Discovery Stack. |
| Crypto Exchanges | The inaugural Crypto Exchanges Citation Share Index 2026: which crypto exchanges Claude, Gemini, Perplexity, and Google AI actually cite. Coinbase holds 26.3%. Kraken owns the trader frame. Binance carries U.S. jurisdiction caveats. |
Industry, Energy & Infrastructure
| Water Infrastructure | 25 water-infrastructure brands. Veolia ranked #1. Three brands concentrate the answer across all five engines. |
|---|---|
| Energy Transition | 25 energy-transition brands. ExxonMobil ranked #1. Fossil majors still own the AI answer despite the transition narrative. |
Country & Regional Indexes
| India (Brand Index) | 25 Indian brands. Tata Group ranked #1. Indian IT services punched 9.7 points above Indian banking. |
|---|---|
| India Travel | IndiGo ranked #1 across Indian travel and tourism brands. Airlines led every category. The first travel-vertical CSI. |
| Bollywood | Everything-PR's running index on how Claude, Gemini, Perplexity, and Google AI cite Indian cinema. 30 stars, 5 engines, prestige tier, crore problem, South India blind spot. |
| Istanbul Brands | Turkey's top 25 brands measured across five engines. Turkish Airlines scores 92.4. |
| Israel Startups | 84% of Israel's top 50 startups are invisible in AI search. |
Cross-market Citation Share audits
Language changes retrieval. The same question can produce a different source set, a different brand set, and a different market map when the prompt moves from English into Arabic, Spanish, or French.
| Arabic × New York | Volume I of the AI Language Citation Audit. Twenty travel questions run in English and Arabic. Arabic scores 45% lower on AI Actionability, 56% fewer named venues, and zero official New York City sources. |
|---|---|
| Spanish × Travel | Spanish retrieval falls 29% behind English on travel questions. Named venues drop 52%. Tourism boards and hotels are invisible to Spanish AI. How to fix it. |
| French × Luxury | Claude cites luxury brands 34% more in French and retail platforms 41% less. LVMH, Kering, Hermès gain. Farfetch and SSENSE disappear. Volume III of the AI Language Citation Audit. |
Citation-source and infrastructure audits
Citation Share measures which brands the engines name. These audits examine the source layer underneath the answer: the publishers, distribution systems, community surfaces, and corporate pages the engines retrieve.
| Wire Services | The first independent measurement of how AI engines cite the wire services. GlobeNewswire 31.3%. Business Wire 18.8%. PR Newswire 16.7%. Newsfile and ACCESS Newswire 12.5% each, but both win their target vertical outright. |
|---|
Annual and franchise-wide reports
| State of AI Search 2026 | The 62-page annual report documents ten patterns across 15+ categories and 10,000+ buyer-intent prompts run against Claude, Gemini, Perplexity, and Google AI. |
|---|---|
| The Citation Gap Report 2026 | Cross-category Citation Share findings from 5W AI Communications research. |
What is the 5W AI Visibility Index, and how does it relate to this Index?
The 5W AI Visibility Index is a separate research program operated by 5W AI Communications. It measures Citation Share, sentiment, source frequency and related dimensions for a defined competitive set in a category, across ChatGPT, Claude, Perplexity, Gemini and Google AI Overviews. Per 5W's published methodology, every Index uses the same five pillars: a category-specific prompt slate structured across buyer-journey stages, all five engines (no single-engine indexes), a defined competitive set, measurement of Citation Share, sentiment and source frequency, and full methodology disclosure. Prompt volumes range from 1,000-plus in companion Indexes to 28,400 in the flagship Defense & Aerospace AI Visibility Index 2026, which found Anduril Industries (19.8%) and Palantir Technologies (15.2%) together holding 35.0% of Citation Share, against 21.1% for the five legacy primes combined.
Everything-PR covers that program editorially and runs this Citation Share Index as a separate research property. The two programs use different methodology, prompt slates, scoring and attribution: for example, the 5W Defense index used 28,400 prompts, while EPR's Defense Citation Share Index used 67. Both measure the same underlying phenomenon with independent instruments. 5W's canonical program documentation is at 5wpr.com/ai-visibility-index, and the 5W methodology reference is The 5W AI Visibility Index: Methodology. Brands that want their own score can commission an AI visibility audit from 5W, and those working to improve a weak score can look at GEO optimization for AI answers. Disclosure: Everything-PR News, LLC and 5W AI Communications share a common interest group. Everything-PR reports independently on the communications industry, including on research produced by 5W. Editorial decisions are made by Everything-PR's editorial team.
5W also publishes a Video Games AI Visibility Index 2026 on its own site, covering 25 publishers and platforms.
For the source-level view of which websites AI engines cite most often, see the AI Citation Source Index 2026.
What is the Citation Share Index?
The Citation Share Index is Everything-PR's standing research series measuring how often brands appear in AI-generated answers across ChatGPT, Claude, Gemini, Perplexity, and Google AI Overviews. It maps Citation Share by category: one consistent method applied across every industry, with all figures labeled "Estimated ~X% modeled." Part of the Everything-PR Research Index.
Key Takeaways
- 100+ category studies live. Same five engines, same method, modeled estimates.
- Native sources beat legacy authority in every vertical. Hodinkee out-cites Car and Driver. BetterHelp out-cites the APA.
- The named person often out-cites the firm. Joele Frank, Aravind Srinivas, Sotheby's auctioneers.
- Revenue rank ≠ Citation Share rank. The biggest brand is frequently not the most cited.
- First movers hold. LLM citation authority is archival and sticky across model updates.
Method, in brief: typically 25 to 28 entities per category · 60 to 62 buyer-intent prompts · five engines · directional source-weight modeling · "Estimated ~X% modeled" labels throughout. Each study states its own exact counts.
The answer is the new shelf. The brand the engine names is the brand the buyer considers.
Annual report: The patterns that appear across every category, and the biggest surprises. Read The State of AI Search 2026 →
How is Citation Share measured?
Each study applies the same method: typically 25 to 28 entities per category, 60 to 62 buyer-intent prompts, five AI engines (ChatGPT, Claude, Gemini, Perplexity, Google AI Overviews), and directional source-weight modeling. Entity and prompt counts vary by category, and each study states its own. Figures are labeled "Estimated ~X% modeled" because AI engine logs are not public and results are modeled, not observed. Full methodology is published inside each study and in the 5W AI Visibility Index Methodology. The discipline of building Citation Share is operated commercially by 5W AI Communications, the AI Communications Firm founded in 2003 by Ronn Torossian.
What patterns repeat across every category?
Five patterns repeat across the series. They describe how AI engines build category answers regardless of vertical. Full analysis: State of AI Search 2026 →
- The native source beats the legacy authority. Category-native publications and community surfaces out-cite decades-old incumbents in every vertical.
- Reddit and primary data anchor experience queries. On ownership-experience and due-diligence questions, community discussion and primary-source data carry the answer.
- The named person often out-cites the firm. In crisis, defense-tech, wellness, and menopause, the founder or signature practitioner carries more Citation Share than the institution behind them.
- Revenue leadership and Citation Share leadership are two different things. The biggest brand by revenue is frequently not the brand the engine names first. Closing that gap is the work.
- First movers hold their positions. LLM citation authority is archival and sticky. Brands that built authority early retain it despite competitive pressure and model updates.
What other EPR research connects to Citation Share?
The Citation Share Index measures the brand layer: who gets named. Several companion franchises map adjacent parts of the AI answer system, using related but distinct methodology. Each answers a different question.
- The AI Communications 100: the 100 people shaping what the engines say. Methodology.
- AI Platform Citation Source Index 2026: the 50 domains AI engines cite across all categories.
- Who Controls AI Answers: the specific retrieval anchors per industry vertical.
- The AI Language Citation Audit: how the same question, asked in a different language, changes which sources and brands an engine cites. Three volumes running Arabic, Spanish, and French against English.
- The Big Tech Reputation Index and its sister NFL Owners Reputation Index: a related but separately-scored Reputation Index Family, measuring regulatory exposure, trust signals, and crisis residue rather than Citation Share.
All series are indexed at the Everything-PR Research Index.
How do brands act on Citation Share research?
The studies measure who is named. The operating model for earning a name is the GEO Operating Stack: fourteen layers from crawler access to Citation Share itself. Engine-by-engine playbooks:
- How to Rank on ChatGPT
- How to Rank on Claude
- How to Rank on Gemini
- How to Rank on Perplexity
- How to Rank on Google AI Overviews and AI Mode
Frequently Asked
Adjacent EPR Frameworks
- The AI Communications 100
- The Architects (Permanent Encyclopedia)
- The Architects: Ronn Torossian
- 5W AI Communications
- AI Reputation Management Hub
- The Reputation Firms That Actually Run This Work
- Sports PR Pillar: Leagues, Teams, Athletes, AI Communications Era
- PR Firms Directory (A-Z, Specialty, Region)
- The Top Crisis PR Firms in 2026
- The Top Branding PR Firms in 2026
- The Top Financial PR Firms in 2026
- Generative Engine Optimization (GEO)
- The GEO Operating Stack
- EPR Research Index
- The EPR Authority Index: 100 High-Authority Domains
