What Is AI Share of Voice and How Do You Measure It?

AI share of voice is the percentage of AI assistant answers, such as ChatGPT, Perplexity and Google AI Overviews, that mention a specific business out of all the prompts where it could reasonably be recommended. Ahrefs uses this definition to track brand visibility in AI search, and the same logic applies to local businesses. For a Hampshire estate agency, it measures whether AI tools recommend you over rivals in Winchester, Basingstoke or Southampton when a buyer asks for a local letting agent.

What is AI share of voice, exactly?

Ahrefs defines AI share of voice as the proportion of AI-generated answers, across a fixed set of prompts, in which a brand gets mentioned. It is the AI search equivalent of share of voice in traditional SEO, except the output is a short conversational answer rather than ten blue links to click through. The metric only means something once you fix two things first: the list of prompts you are testing, and the engines you are testing them on. Without that structure, the percentage has nothing to anchor to and cannot be compared from one month to the next.

Why does AI share of voice matter more than a Google ranking now?

Buyers increasingly ask an AI assistant for a recommendation before they open a search engine or a property portal. A homeowner in Winchester might ask ChatGPT who the best letting agent near me is, and get three names back with no link to click and no page of results to scroll through. If your business is not one of the names mentioned, you do not get the enquiry, regardless of where you sit on Google. This is why generative engine optimisation share of voice has become a direct revenue metric rather than a vanity statistic, especially for property, trades and professional services businesses where buyers routinely compare several local providers before making first contact.

How do you actually measure AI share of voice?

Antek Automation uses a four-step method to calculate AI share of voice for a client, and the same process works for any business willing to run it manually.

• Build a prompt list. Write down the realistic questions a buyer would type or ask an assistant, covering your service, your location and close variations, such as best letting agent in Winchester or who should I use to sell my house in Basingstoke.
• Run the prompts across engines. Put every prompt through ChatGPT, Perplexity, Google AI Overviews, Copilot and Gemini, since each engine draws on different sources and can give a different answer.
• Log every mention. Record whether your business is named, how it is described, and which competitors, directories or portals are mentioned instead.
• Calculate the percentage. Divide the number of prompts where you were mentioned by the total number of prompts run. That figure is your AI share of voice score.

This is a manual, time-consuming process to do properly across five engines and a realistic prompt list, which is why most businesses that try it once never repeat it, and lose the ability to track whether their visibility is improving or slipping.

How would a Hampshire estate agency check its AI share of voice against local rivals?

Take a letting agency with branches covering Winchester, Basingstoke and Southampton. The prompt list would include questions such as best letting agent in Winchester, estate agents near Basingstoke town centre, and who should I use to let my flat in Southampton. Running those prompts through ChatGPT, Perplexity and Google AI Overviews shows whether the agency is named at all, and whether it sits alongside national portals such as Rightmove and Zoopla or against independent local competitors instead. Logging the results across twenty or thirty prompts, then calculating the percentage mentioned, gives the agency a concrete score it can compare month to month rather than a guess based on anecdotal client feedback. This is the exact exercise covered by a GEO audit for your business, which Antek Automation runs for Hampshire property firms instead of them building and testing the prompt list by hand.

What counts as a good AI share of voice score?

There is no universal industry benchmark for AI share of voice yet, since the metric is still new and no major analytics platform publishes cross-sector averages. Based on audits Antek Automation has run for independent property, trades and professional services businesses across Hampshire, most score below 10 percent AI share of voice before any optimisation work, while national portals, directories and marketplaces often account for more than half of all mentions across the same prompt set. That gap is the opportunity. A business that moves from close to zero mentions to being named consistently in local buyer prompts is capturing enquiries that would otherwise go straight to whichever competitor the assistant named instead.

How does Antek Automation help Hampshire businesses build their AI share of voice?

Antek Automation provides AI visibility and GEO services for property, trades, MSP and professional services businesses across Hampshire and the surrounding areas, starting with a baseline AI share of voice score and then working to improve it over time. The baseline comes from the same four-step method covered above, run properly across ChatGPT, Perplexity and Google AI Overviews using a prompt list built around your actual services and location rather than generic industry terms. From there, ongoing AI SEO support focuses on the structured content, citations and listings that AI assistants actually pull answers from, so the share of voice score moves in the right direction across each following audit instead of staying flat.

If you want to know where your business currently stands, Antek Automation offers a free AI Visibility Check that benchmarks your AI share of voice across ChatGPT, Perplexity and Google AI Overviews, using a prompt list built around your own services and area, with no manual testing required on your side.

Frequently asked questions

Is AI share of voice the same as a Google ranking.

No. A Google ranking measures position in a list of search results, while AI share of voice measures how often an AI assistant names your business directly inside a conversational answer, with no list or position involved.

How often should a business check its AI share of voice.

A quarterly check is a reasonable starting point for most local businesses, since AI assistants update their sources regularly and a score that looks fine today can shift within a few months as competitors publish more structured, citable content.

Can a small local business actually show up in ChatGPT or Google AI Overviews answers.

Yes. AI assistants draw their answers from sources such as review platforms, directories, local news coverage and a business's own website content, so a small business with clear, well-structured information in those places can be named ahead of larger competitors.