How to measure AI share of voice

What does AI share of voice mean?

Share of voice is a marketing term for your slice of the conversation in your category. In AI search, the conversation is the answers AI assistants give.

AI share of voice measures how often those answers mention your brand compared with competitors. It is calculated across a fixed set of buyer prompts.

Tools define it slightly differently. Always check whether a number counts mentions, citations or recommendations.

Think of it as asking a well-read adviser the same questions every week. You count how often they name each brand.

How to measure AI share of voice, step by step

You can do this in a spreadsheet. It gets tedious quickly, which is why many teams automate it.

1. 1

   Fix your prompt set

   Use 20 to 25 unbranded buyer prompts. Keep the exact wording from week to week.

2. 2

   Fix your platforms

   Choose the AI platforms your buyers use, such as ChatGPT, Gemini and Perplexity. Use fresh sessions each time.

3. 3

   Fix your competitor list

   Pick three to five competitors. List every name variant, like Example Co and ExampleCo.

4. 4

   Run on a schedule

   Ask every prompt on every platform weekly. Save the full answer text, not just a yes or no.

5. 5

   Extract mentions and citations

   For each answer, note which brands appear, in what order, and which sources are cited.

6. 6

   Calculate the numbers

   Divide your mentions by total mentions of all tracked brands. Also calculate your mention rate per answer.

7. 7

   Average over time

   Use a rolling four-week average. It smooths out the natural variation between runs.

The share of voice formula, with a worked example

The numbers below are made up to show the method. They are not benchmarks.

Notice that share of voice and mention rate differ. Share compares you with rivals. Rate shows how often you appear at all.

Share of voice = your mentions / mentions of all tracked brands x 100
Mention rate   = answers mentioning you / total answers x 100

Illustrative example:
25 prompts x 3 platforms = 75 answers

Your brand     18 mentions
Competitor A   30 mentions
Competitor B   24 mentions
Competitor C   18 mentions
Total          90 mentions

Share of voice = 18 / 90 x 100 = 20%
Mention rate   = 18 / 75 x 100 = 24%

How to read the numbers without fooling yourself

AI answers change between runs, even for the same prompt. Read results with that in mind.

• Look at trends over four weeks or more, not one run.
• Split results by platform. You may be strong in one and absent in another.
• Split by prompt type. Comparison prompts often behave differently from discovery prompts.
• Check the tone. A mention that warns buyers away is not a win.
• Note your position. Being named first differs from being named fifth.
• Watch for new names. A rising newcomer can take share from everyone you track.

How to check your measurement is working

Run the same set twice in one week. The two results should be broadly similar. Big swings mean your sample is too small.

Spot-check a few answers by hand each month. Make sure name variants and misspellings are being counted.

If a competitor jumps overnight, read the answers. A name clash with an unrelated company can cause false matches.

Each week, WebValet Pro measures brand mentions, citations and share of voice across 25 prompts. It covers ChatGPT, Gemini and Perplexity. It is rolling out during early access. Claude and Google AI Overviews are paid add-ons.

Common share of voice mistakes

Avoid these and your numbers will mean something.

• Counting branded prompts, which inflates your share.
• Changing prompts or competitors midway and comparing old with new.
• Comparing numbers from two tools that define the metric differently.
• Ignoring negative or inaccurate mentions.
• Reporting a single run as a result.
• Tracking so many competitors that every share looks tiny.

Questions people ask