Glossary

Share of voice (AI): definition and examples

The classical marketing metric adapted for AI answers — how a brand stacks up against a named competitor set.

Last updated Q1 2026

Share of voice (AI) is the proportion of AI answers that feature a brand among a named competitive set.

In detail

Share of voice (AI) adapts the classical share-of-voice metric to AI search answers. The formula counts brand mentions across a fixed prompt set, then expresses each brand's mentions as a percentage of total competitor mentions. It requires a defined competitor set — typically three to seven brands — and a stable prompt list so the numbers can be compared over time.

Share of voice and share of model sit next to each other on most dashboards. Share of model is the metric primitive; it reports absolute visibility. Share of voice is the relative benchmark; it reports visibility against a competitor slate. Reading them together prevents a common mistake: feeling good about rising share of model while losing ground to faster-growing competitors.

Why it matters

A Shopify brand cannot control the size of the AI answer window. ChatGPT might cite three brands this quarter and five next quarter for the same prompt. Share of voice normalizes for that — the math always divides by the total mentions inside the defined competitor set, so the number is comparable across weeks even when engines change their answer style.

For a VP of SEO, share of voice is the closest AI analog to the rank-tracking reports they already run. It turns "are we winning" into a number a team can report on monthly.

Example

For example: a merino base-layer brand defines a five-brand competitor set and tracks a 30-prompt bank across ChatGPT and Google AI Overviews. In Q1 the brand earns 9 of 45 total mentions across the set (20% share of voice). Two competitors gain review-site coverage in Q2, pushing the brand down to 6 of 52 mentions (11.5% share of voice) even though absolute mentions barely changed. The share-of-voice drop flags the issue two months before revenue dips would have made it obvious.

Related terms

Share of model — the absolute metric share of voice normalizes against.
Brand mentions — the counted signal.
AI brand visibility — the outcome share of voice tracks.
Citation analysis — a sibling qualitative method.
Prompt tracking — the data collection practice.

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Frequently asked questions

How is share of voice (AI) different from share of model?

Share of model is a primitive — how often one brand appears out of total responses. Share of voice (AI) is relative — how often one brand appears out of all mentions across a named competitor set. Share of model says the brand is in 18% of ChatGPT responses. Share of voice says the brand is 18% of the mentions that went to the five-brand competitive set.

How do I choose the competitor set for share of voice?

Pick the brands a shopper actually compares against in the category. A sunglasses brand might pick four direct competitors and two category leaders that keep showing up in answers. Keep the set stable for at least a quarter so the metric is comparable week over week. Adding or removing competitors resets the baseline.

Do I need both share of model and share of voice?

Yes. Share of model tells the team whether absolute visibility is rising. Share of voice tells them whether they are winning or losing against the competitive set. A brand can gain share of model while losing share of voice if every competitor grew faster. Both are reported in the eCommerce Insights dashboard side by side.

Related guides

Benchmark your AI share of voice against your real competitors. Start a free trial or read the Wikipedia entry on share of voice.