AI Share of Voice
Definition
AI Share of Voice is the AI-search equivalent of the traditional share-of-voice metric used in advertising and PR: it measures a brand's mentions in AI-generated answers as a proportion of all mentions across a defined set of competitors, for a shared panel of relevant prompts. A brand mentioned in 30 out of 100 total competitor mentions across a prompt panel has a 30% AI Share of Voice.
Calculating it requires tracking the same panel of prompts across the same AI engines for every competitor being compared, since share of voice is meaningless without a consistent, apples-to-apples baseline. It typically combines mention count with citation rate, since a competitor cited with a link carries more weight than one mentioned only in passing.
AI Share of Voice is most useful as a competitive benchmark rather than a standalone health metric: a brand's AI Visibility Score can rise in absolute terms while its share of voice falls, if competitors are growing their AI presence faster, which is why the two metrics are usually tracked side by side.
AI Share of Voice is best read together with a brand's AI Visibility Score and its Prompt Volume, since a share calculated on too small or unrepresentative a prompt panel can be misleading. BotRank.ai's Multi-LLM Visibility Analysis feature tracks share of voice against a defined competitor set across engines on a recurring schedule.
Examples
Three competing project management tools are tracked across the same 150-prompt panel. Brand A holds a 45% AI Share of Voice, Brand B 35%, and Brand C 20%. Six months later, Brand C's absolute mention count has grown, but its share has fallen to 15% because Brand A and B grew faster over the same period.
Frequently Asked Questions
How is AI Share of Voice calculated?
It is calculated by dividing a brand's mentions across a defined competitor set and prompt panel by the total mentions all tracked competitors received on that same panel, usually expressed as a percentage.
Why does AI Share of Voice require a fixed competitor set?
Without a consistent competitor set and prompt panel, the percentage has no stable baseline to compare against, making trends meaningless from one measurement period to the next.
Can AI Share of Voice fall even if mentions increase?
Yes. If competitors grow their AI presence faster than a brand does, its absolute mention count can rise while its share of the total conversation shrinks.
Is AI Share of Voice the same across every AI engine?
No. A brand's share can vary significantly between ChatGPT, Perplexity, Google AI Overviews and other engines, so it is usually tracked per engine as well as blended.
How often should AI Share of Voice be measured?
Monthly tracking is common for most industries, though fast-moving competitive categories may warrant more frequent measurement to catch shifts driven by product launches or content pushes.
