What is AI Share of Voice?
AI Share of Voice (SoV) is the percentage of AI responses about your category that mention your brand. If you sample 100 ChatGPT answers about "the best AI visibility tool" and your brand appears in 23 of them, your AI SoV for that prompt is 23%.
Unlike search SoV, which measures impressions or rankings, AI SoV measures inclusion in the answer. It is the cleanest way to compare yourself to competitors in the channel users actually consume.
The formula we use
Share of Voice (%) = (mentions ÷ total responses) × 100
Run the same prompt N times, count how often each brand is named, divide. Repeat across the prompts that matter to your business and aggregate. The math is trivial - the discipline is in sampling enough responses (we recommend at least 30 per prompt) and across enough prompts (10 to 50, depending on category breadth).
How to gather the data
- Pick the question your customers actually ask AI - not the question you wish they asked.
- Run the same prompt 30+ times across ChatGPT, Perplexity, Claude, Gemini and Grok. Sampling matters - LLMs are stochastic.
- Count brand mentions per response. Multiple mentions in the same response usually count as 1.
- Total responses = 5 platforms × 30 runs = 150 (or whatever sample size you actually achieved).
- Plug the numbers into this calculator. Repeat for each prompt and average.
The teams that obsess over AI Share of Voice eat the teams that obsess over keyword rankings. The user is asking the engine, not the index. Measuring what the engine actually says is the only thing that matters.
Variants of AI Share of Voice
The single number is useful, but most teams quickly graduate to four sub-metrics that paint a fuller picture.
| Metric | What it measures | When to use it |
|---|---|---|
| Aggregate SoV | Mentions across all prompts and engines | Board-level reporting; quarterly trend |
| Prompt-level SoV | Mentions for a single prompt across engines | Identifying weak categories or use cases |
| Engine-level SoV | Mentions on one engine across prompts | Spotting platform-specific gaps |
| Top-1 SoV | How often you are the FIRST brand mentioned | Measuring category leadership |
Reading your number
- 0-5% - effectively invisible. AI never recommends you for this query.
- 5-15% - on the radar. You appear in some long-tail variants but rarely in the headline answer.
- 15-30% - established. Most well-known brands in a category sit here.
- 30-50% - dominant. You are the safe default the model reaches for first.
- 50%+ - category-defining. Either you have a structural moat or the prompt is too narrow.
How to grow your AI Share of Voice
Five levers, ranked by how reliably they move the number for the average B2B SaaS or services business. Pick the top two and run them concurrently for a quarter before evaluating.
- Earn third-party citations. G2, Capterra, niche subreddits, podcast roundups, comparison articles. The single highest-correlation lever in our data.
- Ship comparison and alternatives pages. A clean
/vs/and/alternatives/set teaches the model your category boundary and reinforces co-occurrence. - Make pricing transparent. AI engines under-recommend brands that hide pricing. A public price page, even a starting-from price, removes friction.
- Open your AI crawl perimeter. Use the AI Crawler Checker to confirm GPTBot, ClaudeBot and PerplexityBot can fetch your important pages. Add llms.txt for explicit curation.
- Track and iterate weekly. SoV changes more slowly than search rankings, but it does move - and it shifts faster every quarter as more buyers start with AI.
Use cases for the calculator
- Founder report - a single SoV number to put on the monthly investor update.
- Marketing planning - decompose by prompt to find the gaps your next campaign should close.
- Competitive analysis - run the same calculator with competitors as the focal brand to gauge their standing.
- PR proof - quantify the impact of a major launch or coverage push by re-running before and after.
- Sales enablement - share the per-prompt breakdown with sales as proof of category presence.
Common mistakes
- Sampling too few responses. 5 runs is not a measurement, it is a coin flip. Use 30 minimum, 100 if you can.
- Counting multiple mentions in one response as multiple data points. Most teams count it as a binary - mentioned or not - per response, per brand. That keeps the math interpretable.
- Comparing your SoV to a competitor with a different prompt set. Different prompts produce different results. Apples to apples requires the same prompt portfolio.
- Stopping after one measurement. SoV is a trend, not a snapshot. Re-run monthly to see whether the levers are actually moving the number.
- Optimising for a number you cannot control. If your category has 200 viable competitors, top-1 SoV of 30% is a fantasy. Aim for top-5 SoV instead.