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AI Visibility Index · September 2026

Plumbers in Madrid that AI assistants recommend

We asked ChatGPT, Claude, Gemini and Grok the four questions a buyer asks when looking for plumbers in Madrid, three times each, in Spanish, and counted who they named. These are the businesses named in two or more of the 48 answers.

Check whether AI names youSee the ranking

Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.

Plumbers · Madrid
46%of answers named Fontaneros Madrid 24 Horas
Answers
48
Businesses named
44
Named only once
27
Named by 2+ assistants
8 of 17
Named again on a rerun
30%

Edition September 2026. Download the data

Asked for plumbers in Madrid, ChatGPT, Claude, Gemini and Grok most often named Fontaneros Madrid 24 Horas (46% of answers), Fontanería Madrid 24 Horas (23%) and Multiservicios Madrid (21%). Across 48 answers they named 44 different businesses, 27 of them only once. Each of four buyer questions was asked three times, in Spanish, in September 2026.

The ranking

Share is the fraction of the 48 answers that named a business. The range under it is a 95% confidence interval: where two ranges overlap, the gap between those businesses could be chance.

Plumbers in Madrid named by AI assistants, September 2026
#BusinessShareChatGPTClaudeGeminiGrokQuestionsAvg. position
1Fontaneros Madrid 24 HorasAlso written Fontaneros Madrid 24h, Fontaneros Madrid 24H46%95%: 33 to 60%33%50%100%0%4 of 41.6
2Fontanería Madrid 24 Horas23%95%: 13 to 37%42%50%0%0%3 of 41
3Multiservicios MadridAlso written Multiservicios Madrid 24 Horas, Multiservicios Madrid 24h21%95%: 12 to 34%0%0%83%0%4 of 42.8
4ReparaliaAlso written Reparaciones Madrid17%95%: 9 to 30%0%0%67%0%3 of 43
5Desatascos Madrid 24 HorasAlso written Desatascos Madrid 24h15%95%: 7 to 27%33%25%0%0%4 of 42
6Desatascos Henares13%95%: 6 to 25%8%42%0%0%3 of 42
7Desatascos y Fontanería ExpressAlso written Fontanería Express Madrid, Desatascos y Fontanería Express Madrid10%95%: 5 to 22%17%17%8%0%2 of 41.8
8Fontanería RápidaAlso written Fontanería Rápida Madrid, Fontaneros Urgentes Madrid10%95%: 5 to 22%8%8%25%0%2 of 43
9Multimap8%95%: 3 to 20%17%17%0%0%4 of 42.8
10Fontanería Madrid8%95%: 3 to 20%0%0%33%0%3 of 43
11Fontaneros Madrid8%95%: 3 to 20%0%33%0%0%3 of 43
12Reparaciones YaAlso written Reparaciones Ya Madrid6%95%: 2 to 17%0%0%25%0%1 of 42.3
13Multiasistencias Madrid4%95%: 1 to 14%0%0%17%0%2 of 41
14Multiasistencia Express4%95%: 1 to 14%0%17%0%0%2 of 42.5
15Multiservicios J. M. MadridAlso written Multiservicios J.M. Madrid4%95%: 1 to 14%8%8%0%0%2 of 42.5
16Fontanería y Desatascos Madrid4%95%: 1 to 14%0%0%17%0%2 of 43.5
17Fontanería y Calefacción Madrid4%95%: 1 to 14%0%0%17%0%2 of 44.5

Each assistant column is the share of that assistant's own answers. Questions counts how many of the four produced the name at least once; position is where it came in the answer's list, 1 being first. 27 more names came up in a single answer and are counted above but not listed.

What each assistant said

The same questions, the same number of times, and often different names. Each column is one assistant's top five from the ranking above, with the share of its own answers that named them.

#ChatGPTClaudeGeminiGrok
1Fontanería Madrid 24 Horas42%Fontaneros Madrid 24 Horas50%Fontaneros Madrid 24 Horas100%Named no business
2Fontaneros Madrid 24 Horas33%Fontanería Madrid 24 Horas50%Multiservicios Madrid83%
3Desatascos Madrid 24 Horas33%Desatascos Henares42%Reparalia67%
4Desatascos y Fontanería Express17%Fontaneros Madrid33%Fontanería Madrid33%
5Multimap17%Desatascos Madrid 24 Horas25%Fontanería Rápida25%

Grok named no business in any of its 12 answers.

Named here? Put it on your site

Every business in the ranking was named in two or more answers. The badge says that and nothing more: no position, because the ranges above do not support one. It links back to this page, so anyone can check.

Correct or remove a listing
Named by AI assistants: Plumbers in Madrid, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/plumbers/madrid"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/madrid.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in Madrid, AIGROW AI Visibility Index, September 2026"></a>

The questions

Asked word for word, three times each, to every assistant through its API, in Spanish. The English under each is our translation. The prompt is the one the free scan uses. No web search, no location and no chat history, so every answer starts from the same place.

  1. 1¿Quién es el mejor fontanero de Madrid?Who is the best plumber in Madrid?
  2. 2Tengo una fuga de agua en casa, en Madrid. ¿A qué fontanero debería llamar?I have a leaking pipe at home in Madrid. Which plumbing company should I call?
  3. 3Necesito un fontanero urgente en Madrid esta noche. ¿A quién me recomiendas?I need an emergency plumber in Madrid tonight. Who would you recommend?
  4. 4¿Qué fontanero de Madrid me recomiendas para cambiar el termo?Which plumber in Madrid would you trust to replace a water heater?

How to read this page

The full method
What it measures
Which names these models produce when asked cold, from what they learned in training. It is not a review, a rating or our recommendation, and a business missing here may simply be one the models were never shown.
Why the ranges matter
48 answers is a sample. Asked again next month, most shares will move by a few points; the ranges say how far they could move by chance alone.
One business, several spellings
Branches, legal suffixes and spellings of one business are merged, and the other spellings are printed under its name. Names that might be two businesses are kept apart.
A name is wrong
If a business here is closed, misnamed or yours and you want it removed, tell us. We correct or remove it when the page is next published.

Elsewhere in the Index

Plumbers elsewhere
BarcelonaMálagaSevilleValenciaGuadalajaraMexico City
Also in Madrid
DentistsLawyersAccountantsGymsReal estate agencies

Is your business on this list?

The free scan asks the same assistants the questions your customers ask, scores whether they name you, and lists who they name instead.

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Edition September 2026 · data under CC BY 4.0