Buyers no longer just Google. They ask ChatGPT, Perplexity, Claude, and Google AI Overviews — and they trust the answer they get back. If your brand isn't in those answers, you're invisible at the moment of decision. AI share-of-voice is the metric that measures that visibility.
What AI share-of-voice actually is
AI share-of-voice (AI SoV) is the percentage of AI-generated answers to your target buyer questions that name, link to, or cite your brand. It's the modern equivalent of share-of-search — but the surface is a generative answer, not a results page.
Unlike Google rankings, AI SoV is binary at the question level. Either the model mentioned you or it didn't. That makes it easier to measure than people expect, as long as you fix the prompt panel and test it consistently.
How to measure it
Build a panel of 30–60 prompts that represent the questions your buyers actually ask. Include comparison prompts ('best X for Y'), method prompts ('how do I solve Z'), and brand-adjacent prompts ('alternatives to [competitor]').
Run the panel monthly across ChatGPT, Perplexity, Claude, Gemini, and Google AI Overviews. For each prompt, record three things: was your brand mentioned, was it cited with a link, and was the sentiment positive, neutral, or negative.
- Mention rate: % of prompts where your brand appears in the answer.
- Citation rate: % of prompts where your domain appears as a source.
- Sentiment: positive / neutral / negative classification of each mention.
How to improve it
AI assistants pull from a mix of training data, real-time web search, and authority signals. To influence what they say about you, you need to be present and consistent across the sources they trust.
The fastest moves: publish entity-rich pages about your method, products, and POV; add Organization, Product, and FAQ schema to those pages; earn citations from sites the models already trust (industry publications, directories, Wikipedia adjacent); and answer the exact prompts your buyers use, in the structure models prefer (question → direct answer → supporting detail).
Why this matters now
Search behaviour is shifting fast. Google AI Overviews already eat clicks for informational queries, and ChatGPT plus Perplexity have become primary research tools for B2B buyers. The brands that get cited today will be the default answer in two years. The ones that wait will spend the rest of the decade trying to displace them.
Frequently asked questions
What is AI share-of-voice?
The percentage of relevant AI-generated answers that cite or mention your brand. It's the modern equivalent of share-of-search.
How do I measure it?
Run a fixed prompt panel monthly across ChatGPT, Perplexity, Claude, Gemini, and Google AI Overviews. Track mention rate, citation rate, and sentiment.
How do I improve it?
Entity engineering, structured content, citations from authoritative sites, and answer-shaped pages mapped to high-intent prompts.
How fast can I move the number?
Citation rate moves in 30–90 days when you ship structured, answer-shaped content. Mention rate (training-data influenced) lags 6–12 months.