Only 7.2% of Domains Get Cited in Both LLMs and AI
Each AI platform uses different sources. Only 7.2% of domains achieve citation across both AI Overviews and LLM platforms. Cross-platform data.
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. 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 core truth about AI search: there is no single optimisation that works everywhere. Each platform has its own source index and its own citation criteria.
| 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 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 only for Google. This gives them visibility in AI Overviews and Gemini. But it leaves them invisible to ChatGPT, Copilot, and potentially Perplexity and Claude. 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.
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. ChatGPT is the dominant AI search platform. Missing it is like 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% |
Nearly half of domains are not cited anywhere. These businesses have not yet adapted to AI search. That number is shrinking as more businesses invest in visibility. But it still represents a large 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 covers part of the picture. You need an agency or strategy that addresses all major AI platforms at once. The agencies that test across ChatGPT, Gemini, Perplexity, Copilot, and Claude are delivering the multi-platform approach this data demands.
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Oliver Mackman
AI Search Analyst, SEOCompare
Oliver leads SEOCompare's editorial and comparison research. With over a decade in digital marketing, he oversees agency evaluation, tool testing, and AI search data analysis.
Last reviewed: 7 April 2026
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