How Brands Rank Inside AI Search
The 5W research franchise measuring how generative AI engines surface brands across consumer search. Each Index ranks the top 25 brands in a category by citation share across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews.
5W is the AI Communications Firm and the publisher of the AI Visibility Index Series. Through a dedicated Generative Engine Optimization (GEO) practice, 5W helps the world's leading brands earn citation authority across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — while continuing to deliver the consumer, corporate, crisis, healthcare, technology, sports, lifestyle, and public affairs work that has made 5W one of the largest independent communications agencies in the United States.
5W's AI Visibility Index Series measures who is winning that citation surface and who is not. Each Index ranks the top 25 brands in a single consumer category by estimated AI citation share, identifies the structural patterns driving the citation consolidation, and lays out the Generative Engine Optimization (GEO) playbook for brands that want to compete on the new surface. The Series is published as ongoing 5W research; new categories are added as they are completed.
The Indexes
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Read the report →Grocery Retail
Top U.S. grocery retailers ranked by AI citation share across major answer engines.
Read the report →Entertainment & Streaming
Streaming services, studios, and production companies by AI citation share.
Read the report →Sports Betting & Gaming
Which operators are winning inside AI-powered consumer research.
Read the report →Weight Loss & Metabolic Health
GLP-1, weight loss, and metabolic health brands inside AI consumer research.
Read the report →Dating Apps
How dating apps are surfaced, recommended, and compared by AI platforms.
Read the report →EdTech
How education technology brands surface or disappear inside AI-powered buyer research.
Read the report →Legal
How clients now find lawyers and why the legal industry is behind the AI discovery shift.
Read the report →In Tune With AI
Global ranking of celebrities, athletes, founders, and creators most aligned with the AI era.
Read the report →Israel Startup Nation
Claude's presence, usage, and relevance inside Israel's startup ecosystem.
Read the report →DTC Graveyard
Why DTC brands built for clicks died and brands built for citations survived.
Read the report →Crypto & Digital Assets
Coinbase, Kraken, Gemini, BlackRock IBIT, and the citation consolidation reshaping U.S. crypto.
Read the report →Cannabis
Curaleaf, Trulieve, Green Thumb, and the post-rescheduling citation surface.
Read the report →Beauty
The Ordinary, CeraVe, Sephora, and the ingredient-transparency moat.
Read the report →Local Services
The 78% local-services AI invisibility crisis.
Read the report →Credit Cards
Three publisher domains supplied 62%+ of citations across 4,200 credit card prompts. Issuer-owned domains supplied less than 6%.
Read the report →Wedding Industry
The Knot, Zola, WeddingWire — a 73% citation duopoly post-ChatGPT-app launch.
Read the report →HVAC & Plumbing
ServiceTitan post-IPO, Roto-Rooter, and the 87% contractor invisibility gap.
Read the report →Cigar & Pipe
Padron, Arturo Fuente, Davidoff — the family-controlled premium cigar moat.
Read the report →Pool & Spa
Leslie's, Pinch A Penny, Pentair, Hayward — the $21B backyard category.
Read the report →Car Wash
Mister Car Wash, Tommy's Express, Quick Quack — and the Zips bankruptcy fallout.
Read the report →Funeral & End-of-Life Services
SCI / Dignity Memorial, Trust & Will, Eterneva — and 88% independent funeral home invisibility.
Read the report →AI Visibility Index FAQ
How does the 5W AI Visibility Index measure citation share?
5W runs a standardized prompt set across ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews, captures every brand mentioned in generated answers, and calculates each brand's share of total branded mentions for the category.
Which AI engines are included in each Index?
ChatGPT (OpenAI), Claude (Anthropic), Perplexity, Gemini (Google), and Google AI Overviews.
How are categories selected for the Index series?
Categories are selected based on consumer search demand, the speed at which AI is reshaping discovery in the category, and client demand for the data.
Can a brand commission a custom AI Visibility Index?
Yes. Brands can commission a custom AI Visibility Index for any consumer or B2B category through 5W's Generative Engine Optimization practice.
How often are Indexes refreshed?
Each Index is published as a dated report. Refreshes are scheduled when the underlying AI citation surface materially shifts.
Commission a 5W AI Visibility Index
For inquiries about Generative Engine Optimization engagements, AI Visibility Index licensing, custom industry research, or category-specific PR and communications: visit 5wpr.com/practice/geo-optimization or contact [email protected].
5W headquarters: 469 7th Avenue, Floor 8, New York, NY 10018. Telephone: (212) 999-5585.