AI Visibility Index
Explore the category-level benchmarks that feed the State of AI Search annual report, including citation share rankings across consumer and B2B markets.
See the Indexes →Ten findings that define the year.
A summary of the most consequential patterns 5W identified across 15+ consumer and B2B categories, 10,000+ AI engine prompts, and a year of citation tracking. Each finding maps to a chapter in the full report.
FINDING 01
Citation share is concentrating faster than market share.
In the categories 5W tracked, a small number of brands captured the majority of citations across the five major engines. The pattern is more concentrated than traditional share-of-voice or organic search rankings would suggest.
FINDING 02
The top-cited brand wins disproportionate consideration.
Across categories, the brand cited first inside AI answers tends to capture far more buyer-research mindshare than its citation rate alone would predict — a self-reinforcing dynamic that compounds over time.
FINDING 03
Each engine has distinct citation preferences.
ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews favor different source mixes — community content, editorial press, structured data, and analyst coverage carry different weight per engine. Single-engine optimization leaves citation share unclaimed.
FINDING 04
Reddit is a disproportionately influential source.
Across categories with active community discussion, brands with strong Reddit visibility consistently outperformed competitors who relied solely on owned-content marketing. Community sentiment is a top-tier AI citation signal.
FINDING 05
Earned media remains the strongest single GEO signal.
Brands with active earned media programs across high-authority publications captured citation share that paid media spend alone could not buy. Independent third-party validation outperforms owned content as an AI citation input.
FINDING 06
Schema markup is a baseline, not a differentiator.
Most leading brands in their categories now have comprehensive schema deployments. The absence of schema is a critical gap; the presence of it is table-stakes. The next-frontier signal is structured citation density across third-party sources.
FINDING 07
Citation decay is real and measurable.
Brands that paused earned media and structured-content investment experienced measurable citation share loss within months — often before traditional metrics reflected the decline. AI visibility is not a one-time investment.
FINDING 08
Local services categories are dramatically under-cited.
HVAC, plumbing, dental, funeral services, car wash, and other local categories show consistent patterns of operator invisibility — most local businesses are not cited at all when buyers ask AI engines for recommendations.
FINDING 09
AI Overviews are reshaping the SERP economy.
Across measured categories, AI Overview presence correlates with shifts in click-through patterns and brand impression value. Brands optimized only for click-through rate are increasingly invisible to a growing share of buyers.
FINDING 10
The citation gap between leaders and challengers is widening.
Year-over-year, the brands at the top of category citation rankings extended their lead — while challengers without active GEO programs lost ground. The flywheel of citation authority is accelerating, not flattening.
Inside the report — nine chapters.
62 pages of analysis, charts, methodology, and prescriptive recommendations. Designed to be the reference any communications, marketing, or PR leader cites in the boardroom.
01
The State of AI Search in 2026
Market sizing, engine adoption, the shift from blue-link search to synthesized answers, and what the data shows about how buyers research today versus three years ago.
8 pages
02
The Five Engines, Compared
ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — citation behavior, source preferences, retrieval logic, and category strengths.
7 pages
03
Citation Share & the New Share-of-Voice
How citation share replaces traditional share-of-voice and share-of-search. The 5W AI Visibility Index methodology and what it reveals about category leadership.
6 pages
04
Category Deep-Dives
Citation leadership patterns across consumer and B2B categories — Beauty, Crypto, Wedding, Local Services, Pickleball, Sports Betting, SaaS, Health & Wellness, and more.
12 pages
05
The Source Mix Problem
Earned media, Reddit, analyst coverage, structured data, community content — what AI engines actually retrieve and how brands should weight investment across sources.
7 pages
06
GEO vs AEO — The Unified Discipline
The strategic distinction between optimizing for recommendation engines (GEO) and answer-extraction engines (AEO), with prescriptive frameworks for each.
5 pages
07
Local AI Visibility — The Next Frontier
The crisis facing local services brands and operators across HVAC, plumbing, dental, funeral, car wash, and home services. What's working, what's not.
6 pages
08
The 2026 GEO Playbook
5W's prescriptive 90-day, 6-month, and 12-month playbooks for brands competing on the AI answer surface — segmented by company size, category, and starting position.
8 pages
09
Methodology & Glossary
Full methodology disclosure, prompt libraries, scoring frameworks, statistical notes, and a glossary of every term used in the report.
3 pages
How 5W researches.
Every finding in this report is grounded in systematic prompt testing across all five major AI engines. The methodology mirrors the 5W AI Visibility Index Series — extended to a full annual sample.
The report's methodology section discloses every prompt category, every engine sampling cadence, every scoring rubric, and the limitations and confidence intervals that apply. Readers can replicate the analysis, challenge the findings, and apply the framework to their own categories.
5W maintains its prompt libraries as living documents — re-tested quarterly to track movement and updated continuously as engines evolve.
- Engines analyzed 5 (ChatGPT, Claude, Perplexity, Gemini, Google AI Overviews)
- Categories sampled 15+ B2C and B2B
- Prompt set 10,000+ buyer-intent queries
- Scoring framework Citation share, query share, sentiment, source mix, density
- Sampling window Year over year, with quarterly comparison
- Lineage 5W AI Visibility Index Series
- Updates Annual; methodology revisions documented
Download — Free with Email
Get the full report — 62 pages.
The full PDF includes all category deep-dives, methodology, the 2026 GEO playbook, source mix analysis, and prescriptive 90-day, 6-month, and 12-month frameworks for brands competing on the AI answer surface.
- 62-page PDF, designed in 5W brand
- Full citation share rankings for 15+ categories
- Engine-by-engine source mix analysis
- GEO vs AEO unified playbook
- Quarterly update emails through 2026
For media & analysts.
5W research leadership is available for interviews, briefings, and contributed commentary on AI search, citation share, and the brands winning across generative engines.
Press Inquiries
Embargoed access, expert interviews, custom data cuts for editorial projects, and standing briefings for tech and marketing trade press.
[email protected] →Analyst Briefings
Custom briefings for industry analysts and research firms covering AI, search, marketing technology, and communications.
Request a briefing →Speaking Engagements
5W research leads are available to present findings at conferences, client events, and industry gatherings. Topics span AI visibility, GEO, AEO, and category-specific data.
Book a speaker →Continue into the 5W AI search system.
GEO Glossary
Read the 5W Generative Engine Optimization glossary for the terms, measurement framework, and source-authority concepts used throughout the report.
Read the GEO Glossary →AEO Glossary
Compare GEO with Answer Engine Optimization and the direct-answer surfaces reshaping Google AI Overviews, featured snippets, and zero-click discovery.
Read the AEO Glossary →About 5W
The AI Communications Firm.
5W is the AI Communications Firm, building brand authority across the platforms where decisions now happen — ChatGPT, Claude, Perplexity, Gemini, and Google AI Overviews — alongside earned media, digital, and influencer channels. 5W combines public relations, digital marketing, Generative Engine Optimization (GEO), and proprietary AI visibility research, helping clients measure and grow their presence in AI-driven buyer research.
Founded more than 20 years ago, 5W has been recognized as a top U.S. PR agency by O'Dwyer's, named Agency of the Year in the American Business Awards®, and honored as a Top Place to Work in Communications in 2026 by Ragan. 5W serves clients across B2C sectors including Beauty & Fashion, Consumer Brands, Entertainment, Food & Beverage, Health & Wellness, Travel & Hospitality, Technology, and Nonprofit; B2B specialties including Corporate Communications and Reputation Management; as well as Public Affairs, Crisis Communications, and Digital Marketing, including Social Media, Influencer, Paid Media, GEO, and SEO. 5W was also named to the Digiday WorkLife Employer of the Year list.