Our research

VCNZ LAB
(Data Insights)

This is where we publish what we measure: which brands AI recommends, how search is changing and which signals actually matter. Our own data, methodology in plain sight. No forms — everything reads in full.

Observatories

Rankings · updated monthly

Observatory·October 2026 edition·Updated monthly

AI visibility ranking of Spanish universities

Which universities AI recommends when someone asks where to study in Spain. An index blending 200 key queries across ChatGPT, Gemini, Claude and Perplexity with AI presence, every month.

View the full ranking

Lava columns of different heights rising from a volcanic landscape, like a ranking

How we measure

THE LAB RULES

Each edition's figures change every month and live in their ranking, with their date. What doesn't change is how we measure: these rules apply to every observatory.

The major models
Every query goes to ChatGPT, Gemini, Claude and Perplexity.: A single index
The AI Visibility Index combines in one score how often AI recommends you and how often it mentions you.: Monthly editions
Each observatory is updated once a month, with the methodology published.: Fully open
No forms: the data is there to read, link and cite.

Source: Volcanz AI Visibility Observatories · each edition's data lives in its ranking

From the blog

RESEARCH IN ARTICLES

See the full blog

GEO · AI Search·9 min

How AI decides who to cite (and how to get into the answer)

GEO · Measurement·10 min

How to know if AI recommends your brand (and what to do if it doesn't)

GEO · Brand·8 min

How to test whether AI understands your brand (and why it matters)

Resources

TOOLS

The same measurements behind the studies, applied to your domain. Free, no sign-up.

01
Express X-Ray
Enter your domain and in 30 seconds see whether ChatGPT, Gemini and Perplexity recommend you — or your competitors.

The method

HOW WE WORK

Our own data

We run the queries ourselves, against the real models with web search on. We don't recycle third-party reports.

Methodology in plain sight

Every piece explains how it was measured: which prompts, which models, how many queries. Anyone who wants to argue with the numbers can.

Everything in the open

The full content lives on the page, crawlable and citable. No PDF in exchange for your email.

In the media

IN THE PRESS

Ahrefs' Spanish-language blog featured Juan Carlos Trueba, Volcanz's founder, as one of the three experts in its 2025 digital marketing trends piece — also on video on their YouTube channel.