Glossaire · GEO

AI Share of Voice

AI share of voice is how often a brand is cited in the answers of generative engines — ChatGPT, Perplexity, Gemini — across a set of target queries, compared to its competitors. It's the flagship metric of GEO.

AI share of voice is the measure of how often your brand appears in the answers of generative engines, relative to your competitors, across a panel of representative queries. It's the AI-side equivalent of market share in classic search — and the central metric for steering GEO.

How AI share of voice is measured

You define a set of strategic queries, put them regularly to ChatGPT, Perplexity, Gemini and AI Overviews, then count how many times the brand is cited relative to the total brands mentioned. Tracking over time reveals the trajectory: are we climbing, plateauing, or losing ground to competitors?

A concrete example

Across fifty GEO-related queries, an agency cited in eighteen answers against a competitor cited in nine holds a higher AI share of voice on that theme. It's a far more telling indicator than traffic alone, because it captures visibility where the click never even happens.

Why it matters

AI share of voice turns an otherwise vague goal — "be visible in AI" — into a concrete number. It depends on brand mentions, GEO seeding and E-E-A-T. To measure and grow it, see our GEO agency.

Key takeaway

Traffic measures the click; AI share of voice measures the mention. In a click-free world, the mention is what counts.

FAQ

Questions fréquentes

You run a panel of target queries across several engines (ChatGPT, Perplexity, Gemini) at regular intervals, and count how often the brand is cited versus its competitors. Share of voice is the ratio of those citations.

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