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Share of voice in AI search.

The single most useful competitive metric for the generative era - how often your brand appears in AI answers versus the competitors you actually care about.

TL;DR
AI share of voice is the share of sampled answers, across a fixed prompt set and engine list, that mention your brand vs. tracked competitors. It's measured weekly, expressed as a percentage, and labelled with a confidence tier based on sample size.
Share of voice
100% tracked
32%
28%
22%
18%
You32%
Competitor A28%
Competitor B22%
Competitor C18%
Bounded
0–100%
always sums to 100% across the tracked set
Per engine
4
ChatGPT · Perplexity · Gemini · Claude
Min sample
50
prompts for a directional read
Strong read
500+
prompts for board-grade confidence

The definition

For a given prompt set P, engine list E, and competitor set C (you plus competitors), share of voice for brand b is:

SoV(b) = mentions(b) / sum(mentions(c) for c in C)

Mentions are counted per analysed answer with a deterministic mention parser (exact + alias + entity match). One brand can be mentioned multiple times in one answer but counts as one mention per answer.

Why it's the right metric

  • Bounded - sums to 100% across the tracked set, so it's directly comparable week over week.
  • Engine-aware - you can compute SoV per engine or pooled across engines.
  • Competitive - it explicitly answers "are we winning the answer over X?".
  • Actionable - gaps map cleanly to specific prompts, citations and source pages.

What it looks like at the prompt level

The aggregate is only useful when you can drill into the individual prompts. The platform shows you exactly which prompts you're winning, missing or losing - per engine, per week:

Tracked prompts
  • best ai visibility trackerCPGXmentioned
  • track citations in chatgptCPmentioned
  • perplexity seo toolsCPGmissed
  • ai brand monitoring softwareCGXmentioned
  • how to rank in ai overviewsGmissed
Mention rate tells you how often you appear. Share of voice tells you whether you're winning.
The competitive metric

How to grow it

Three reliable levers:

Three reliable levers
  1. Step 01
    Earn comparison coverage

    Third-party 'best X' and 'X vs Y' pages drive more mentions than any other tactic.

  2. Step 02
    Publish evidence-led claims

    Specific numbers, named customers and structured comparisons get extracted more often than brand copy.

  3. Step 03
    Close prompt-level gaps

    Find the prompts a competitor wins; ship content + PR targeted at those specific intents.

  4. Step 04
    Re-measure weekly

    Verify the lift; lock the wins; rotate to the next 5 gaps.

Pair this with the tracking playbook and the improvement playbook for an end-to-end program.

Frequently asked questions

Is AI share of voice the same as SEO share of voice?+
No. SEO share of voice is weighted by SERP position and search volume. AI share of voice is computed from sampled answers - the share of answers across a fixed prompt set that mention your brand vs. tracked competitors.
How big does my prompt set need to be?+
At least 50 prompts for directional reads; 200+ for moderate confidence; 500+ for strong reads. Confidence depends on the count of analysed answers, not just prompts - see our methodology.
Can share of voice be over 100%?+
No. It's bounded 0–100% per prompt set, per engine. If multiple competitors share one answer, each gets a partial credit; share-of-voice sums to 100% across the full tracked set.

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