Semrush Releases 2026 AI Visibility Index, Revealing Its First UK Benchmark
By Steven Van ·
The research covers seven months of data across ChatGPT, Gemini, Google AI Mode, and Google AI Overviews.
Brands and sources surfaced by AI differ significantly between the UK and US, according to the latest 2026 AI Visibility Index from Semrush. The report also finds that visibility on one AI platform does not guarantee visibility on another.
Comparing markets and platforms
Presented at Spotlight London, the new edition adds a dedicated UK and US comparison. It examines which brands AI platforms mention, which sources they cite, and how consistently those results appear across platforms. Semrush says those patterns differ by market.
Seven months of data
The announcement describes research covering January to July 2026. It uses fixed monthly sets of 2.5 million UK prompts and 25 million US prompts, built from Semrush search data, across ChatGPT, Gemini, and Google AI Mode. It also includes a larger, variable dataset of Google AI Overviews results for real search keywords.
