What is the GEO Brand Citation Index?

A monthly measurement of how frequently 28 brands are cited by ChatGPT, Perplexity, and Gemini when answering tool evaluation questions.

What does a positive delta mean?

A positive delta (Perplexity > ChatGPT) indicates the brand appears more often in live web search results, suggesting strong current web presence and active content strategy.

What does a negative delta mean?

A negative delta (ChatGPT > Perplexity) suggests the brand is more prominent in AI training data from past content, indicating established but potentially dated authority.

How are brand archetypes determined?

Brands are classified as Dominant (high everywhere), AI Memory (strong in ChatGPT), Live Search (strong in Perplexity), Fading (declining), or GEO Outlier (unusual patterns) based on cross-platform citation patterns.

How can my brand improve its citation index score?

Focus on creating citable, structured content optimized for AI retrieval. See The GEO Lab's guides on extractability and retrieval probability for actionable strategies.

GEO Brand Citation Index — Which Brands Do AI Systems Actually Cite?

Largest negative delta

−48.1

Ahrefs · SEO vertical

Largest positive delta

+50.1

Claude · AI & LLM Tools

Scores 100 on all 3 platforms

ChatGPT · Salesforce

Zero on Perplexity

Majestic · SugarCRM · Keap · Notion AI↗

#	Brand ↕	Vertical ↕	Archetype	ChatGPT ↕	Perplexity ↕	Gemini ↕	Δ P–GPT ↑