Being talked about and being the reference people rely on are two different jobs. A brand can be famous and still not be the place people go to check the facts. In AI search that difference now decides who shapes the answer.
AI search has made that gap measurable. In October 2026 Semrush published the second 2026 edition of its AI Visibility Index, covering ChatGPT, Gemini, Google AI Mode and Google AI Overviews in the UK and the US from January to July 2026. Its central finding is simple, and I think it is the most useful idea in AI visibility right now: being mentioned and being cited are different things.
Mentioned and cited, in plain words
A mention means the AI answer names your brand. A citation means your website, or a page about you, shows up as one of the sources behind the answer. The report is careful here. A mention does not mean the platform recommended you, and a citation is a recorded source position, not a measure of trust. Both matter, but they are separate scores.
According to the Semrush release, averaged across 22 categories and four platforms, fewer than half of the top 100 mentioned brands also appeared among the top 100 cited domains, in every month and in both markets. In the UK the overlap ranged from 36.7 to 45.3 domains out of 100, depending on the month. PPC Land's coverage adds the US range of 41.4 to 47.4, and shows that ChatGPT had the widest gap, at 28.7 to 32.3 in the UK and 32.8 to 35.8 in the US.
Two famous brands, two very different source positions
The report opens with two UK grocers. Tesco and Asda were both among the top 100 mentioned brands on all four platforms in every month studied. Yet in July, Tesco ranked as ChatGPT's 25th most cited UK domain, while Asda ranked 606th. On Gemini the two were much closer, at 29th and 60th. Same fame, very different roles as a source.
The report gives the extreme version a name, the One-Way Door: brands inside all four platforms' top 100 mention lists while their own domains sit outside all four top 500 citation lists. Seven US domains held that position in every month: Chevrolet, Disney, Ford, Honda, Marvel, Nintendo and Toyota. In July, ford.com ranked 14th for mentions on AI Overviews and 748th for citations, as reported by PPC Land. Big budgets and household names did not buy citations.
The quoting is often done by someone else
If the brand is not the source, who is? In many categories it is a third-party site that sits between the buyer and the brand. In UK Finance, Lloyds Bank appeared on all four top 30 mention lists in July, while its domain was on none of the four top 10 source lists. MoneySavingExpert and Wise were on all four UK Finance source lists in every month. In US real estate, Apartments.com, Realtor.com, Redfin and Zillow formed a recurring source core across all four platforms.
News matters too. The Next Web reported that ChatGPT leans on news sites more than the other platforms, with news and information sites taking 29.5% of citations among ChatGPT's top 100 UK source domains on average, and 19.6% in the US.
So the answer about your category is often written from a shelf of comparison sites, marketplaces, portals and publishers. If you are missing from that shelf, or described wrongly on it, the AI repeats the gap.
What this means if you sell in India, the Gulf or Southeast Asia
The Index covers the UK and US only. There is no data in it for our markets, so what follows is my view, not the report's finding.
The pattern is likely to hold wherever buyers compare before they buy. Every market has its own shelf: local marketplaces, comparison and review sites, city forums, regional news and creator content. The names on that shelf differ in India, the UAE, Saudi Arabia, Singapore, Indonesia and Malaysia, which is exactly why a global list of sources is not enough. The work is to find your category's shelf in each market and language, then earn a correct place on it.
Four steps to find out who quotes your category
- Score mentions and citations separately. For a set of real buyer questions, record whether the answer names you and, separately, which URLs it cites.
- List the third-party domains that keep appearing. Group them: comparison sites, marketplaces, news, forums, review platforms.
- Check how each one describes you. Missing, outdated or wrong descriptions are often the fastest fix.
- Fix the list you are missing. If you are named but not cited, your own pages need clearer facts and structure. If you are cited but not named, the third-party shelf needs work.
Our guide on what AI visibility is explains the terms, and the AI visibility audit page shows how we measure both lists by market.
A note on the source
Semrush, which is owned by Adobe, sells tools that track AI visibility, and the report promotes them. The study also says it measures recurrence across months, not growth, and that it does not show visibility changes cause commercial results. I find the mention versus citation split useful because it holds across a very large dataset, not because it proves revenue impact.
The takeaway for a founder or growth lead is short. Fame is not authority. Find out which list you are missing, and who holds it for you today.