Only 7.2% of Domains Get Cited in Both LLMs and AI Overviews

Only 7.2% of domains get cited in both LLM platforms (ChatGPT, Claude, Perplexity) and Google AI Overviews. The remaining 92.8% are visible on one type of platform but not the other — or neither. This fragmentation exists because each AI platform uses different source indexes, different ranking signals, and different citation criteria.

Why cross-platform citation is so rare

The 7.2% figure reveals a fundamental truth about AI search: there is no single optimisation that works everywhere. Each platform has its own source index and its own criteria for what gets cited.

Platform	Primary source index	Key signals
Google AI Overviews	Google Search index	Organic ranking, structured data, E-E-A-T, Knowledge Graph
ChatGPT	Bing	Bing indexing, brand mentions, entity signals, OAI-SearchBot access
Gemini	Google	Google ranking, Organisation schema, Google Business Profile
Perplexity	Multiple (own crawl + APIs)	Content freshness, citation density, PerplexityBot access
Claude	Own crawl + web search	ClaudeBot access, content quality, structured information
Copilot	Bing	Bing indexing, entity data, structured content

The Google-only trap

Most businesses optimise exclusively for Google, which gives them visibility in AI Overviews and Gemini but leaves them invisible to ChatGPT, Copilot, and potentially Perplexity and Claude. Since ChatGPT holds 78% of AI search market share and generates 87.4% of AI referral traffic, Google-only optimisation misses the largest AI search platform entirely.

The critical gap: ChatGPT indexes from Bing, not Google. A business that ranks number one on Google but is not indexed by Bing will not appear in ChatGPT responses. Given that ChatGPT is the dominant AI search platform, this is the equivalent of ranking well on Yahoo while ignoring Google in 2010.

What multi-platform citation requires

To join the 7.2% that get cited across both platform types, businesses need:

• Google indexing + SEO — for AI Overviews and Gemini (most businesses already have this)
• Bing Webmaster Tools + IndexNow — for ChatGPT and Copilot (most businesses skip this)
• AI crawler access — robots.txt allowing GPTBot, OAI-SearchBot, ClaudeBot, PerplexityBot
• Structured data — Organisation, FAQPage, Article, Person schema
• Brand mentions — consistent entity references across LinkedIn, industry publications, directories
• Content format — answer-first paragraphs, clear headings, extractable statements

Platform overlap analysis

Citation visibility	Percentage of domains
Cited in AI Overviews only	~35%
Cited in LLMs only	~12%
Cited in both	7.2%
Not cited in either	~46%

The nearly half of domains that are not cited anywhere represent the businesses that have not yet adapted to AI search — a number that is shrinking as more businesses invest in visibility, but still represents a significant portion of the market.

The agency implication

This data has direct implications for choosing an AI search agency. An agency that only monitors Google AI Overviews is only covering part of the picture. You need an agency — or a strategy — that addresses all major AI platforms simultaneously. The agencies that test across ChatGPT, Gemini, Perplexity, Copilot, and Claude simultaneously are delivering the multi-platform approach this data demands.

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