Guide
What is AI share of voice, and how do you measure it?
AI share of voice tells you how often ChatGPT, Gemini and other AI assistants recommend your brand compared with your competitors. Here's the formula, how to measure it properly, and what good looks like.
AI share of voice = answers that mention your brand ÷ total AI answers × 100, measured across the real questions your buyers ask, asked several times on each AI. At AnswerShelf we call this your AI shelf share.
AI share of voice, defined
Traditional share of voice compares your ads or search rankings with competitors'. AI share of voice does the same for AI answers. When a buyer asks "best CRM for small business", the AI names a few brands. Your share of voice is how often you're one of them.
There are two common ways to calculate it:
- Answer share (what we use): the percentage of AI answers that mention your brand. Simple to explain, and comparable across categories.
- Mention share: your brand's mentions divided by all brand mentions across the answers. Useful when answers list many brands, but harder to compare between AIs that name different numbers of brands.
A worked example
You pick 50 buyer questions, ask each on ChatGPT and Gemini, three times each. That's 300 answers. Your brand appears in 45 of them, so your AI share of voice is 45 ÷ 300 = 15%. If your main competitor appears in 120 answers, they hold 40%. That 25-point gap is the number to close.
How to measure AI share of voice properly
1. Use real buyer questions, not your brand name
Buyers ask "best sunscreen for oily skin", not "is Brand X good". Build questions around each product need in your category: best-for, under a price, comparisons, and use cases.
2. Ask each question more than once
AI answers vary from one try to the next. A single screenshot can make you look much better or worse than you are. Ask each question several times and average the results.
3. Cover every AI, country and language your buyers use
AIs behave very differently. In our AI Shelf Index, ChatGPT named 1.7 brands per beauty answer while Gemini named 6.7, so share of voice on ChatGPT is far more concentrated. Answers can also change with the buyer's country and language: ask from each market you sell in, and in India, in Hindi and Hinglish too.
4. Count brands carefully
Brands appear with different spellings, abbreviations and scripts. Match every variant, including other scripts such as Devanagari, or you'll undercount.
5. Track the same questions over time
Share of voice matters most as a trend. Re-run the same questions monthly or weekly to see what moved after each change.
What good looks like
From our September 2026 India index of 1,080 AI answers across 8 categories:
- Leaders appeared in 29% to 71% of Gemini's answers, depending on the category.
- 7 in 10 brands that Gemini named appeared in under 10% of its answers.
- ChatGPT is pickier: brands with a healthy share on Gemini were often rarely named by ChatGPT.
Common mistakes
- Testing once and trusting the result.
- Using branded questions that already name you.
- Measuring only one AI, or only one country or language.
- Tracking share of voice without looking at which questions you lose.
Frequently asked questions
What is AI share of voice?
AI share of voice is how often AI assistants mention your brand compared with competitors, across the questions your buyers ask. It's usually measured as the share of AI answers that mention your brand.
How do you calculate AI share of voice?
Ask a set of buyer questions several times on each AI, then divide the number of answers that mention your brand by the total number of answers, and multiply by 100. For example, 45 mentions in 300 answers is a 15% share.
What is a good AI share of voice?
It depends on the category. In our September 2026 India index, category leaders appeared in 29% to 71% of Gemini's answers, while 7 in 10 brands that Gemini named appeared in under 10%.
Is AI share of voice the same as AI visibility?
They're closely related. AI visibility is the broad idea of how present your brand is in AI answers; share of voice is one way to measure it against competitors. AnswerShelf calls its version AI shelf share.
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Check my brand free →Last updated: 6 October 2026 · By the AnswerShelf research team