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AI Visibility Index · September 2026

Plumbers in Barcelona that AI assistants recommend

We asked ChatGPT, Claude, Gemini and Grok the four questions a buyer asks when looking for plumbers in Barcelona, 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 · Barcelona
54%of answers named Fontaneros Barcelona
Answers
48
Businesses named
33
Named only once
17
Named by 2+ assistants
8 of 16
Named again on a rerun
42%

Edition September 2026. Download the data

Asked for plumbers in Barcelona, ChatGPT, Claude, Gemini and Grok most often named Fontaneros Barcelona (54% of answers), Desatascos Barcelona (40%) and Multiservicios Barcelona (25%). Across 48 answers they named 33 different businesses, 17 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 Barcelona named by AI assistants, September 2026
#BusinessShareChatGPTClaudeGeminiGrokQuestionsAvg. position
1Fontaneros BarcelonaAlso written Fontaneros Barcelona 24 Horas, Fontaneros Barcelona 24h, Fontaneros BCN54%95%: 40 to 67%92%42%83%0%4 of 41.1
2Desatascos BarcelonaAlso written Desatascos Barcelona 24h, Desatascos Barcelona 24 Horas, Desatascos Barcelona 24H40%95%: 27 to 54%58%100%0%0%4 of 42
3Multiservicios BarcelonaAlso written Multiservicios BCN, Multiservicios BCN 24h, Multiservicios Barcelona 24h25%95%: 15 to 39%0%0%100%0%4 of 42.4
4Fontanería BarcelonaAlso written Fontanería Barcelona 24 Horas, Fontanería Barcelona 24h21%95%: 12 to 34%8%50%25%0%3 of 41
5Fontanería Urgente BarcelonaAlso written Fontanería Urgente Barcelona 24H, Fontanería Urgente BCN10%95%: 5 to 22%8%17%17%0%1 of 42.4
6Reparaciones BCN10%95%: 5 to 22%0%0%42%0%3 of 42.8
7Fontaneros Express BarcelonaAlso written Fontaneros Barcelona Express10%95%: 5 to 22%17%25%0%0%3 of 43
8Servei Estació6%95%: 2 to 17%17%8%0%0%1 of 42.7
9HomeServeAlso written HomeServe España, Reparalia, Reparalia Barcelona6%95%: 2 to 17%8%0%17%0%3 of 43.7
10Fontanería Express BarcelonaAlso written Fontanería Barcelona Express4%95%: 1 to 14%0%0%17%0%2 of 43
11Fontanería J. RocaAlso written Fontanería y Calefacción J. Roca4%95%: 1 to 14%8%8%0%0%2 of 43
12Fontanería Rápida Barcelona4%95%: 1 to 14%0%0%17%0%2 of 43.5
13Reparaciones Ya Barcelona4%95%: 1 to 14%0%0%17%0%2 of 43.5
14Fontaneros 24 Horas Barcelona4%95%: 1 to 14%0%0%17%0%1 of 44
15Instalaciones y Reformas BarcelonaAlso written Instalaciones y Reformas BCN4%95%: 1 to 14%0%0%17%0%1 of 44
16ServiBCN Fontaneros4%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. 17 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
1Fontaneros Barcelona92%Desatascos Barcelona100%Multiservicios Barcelona100%Named no business
2Desatascos Barcelona58%Fontanería Barcelona50%Fontaneros Barcelona83%
3Fontaneros Express Barcelona17%Fontaneros Barcelona42%Reparaciones BCN42%
4Servei Estació17%Fontaneros Express Barcelona25%Fontanería Barcelona25%
5Fontanería Barcelona8%Fontanería Urgente Barcelona17%Fontanería Urgente Barcelona17%

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 Barcelona, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/plumbers/barcelona"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/barcelona.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in Barcelona, 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 Barcelona?Who is the best plumber in Barcelona?
  2. 2Tengo una fuga de agua en casa, en Barcelona. ¿A qué fontanero debería llamar?I have a leaking pipe at home in Barcelona. Which plumbing company should I call?
  3. 3Necesito un fontanero urgente en Barcelona esta noche. ¿A quién me recomiendas?I need an emergency plumber in Barcelona tonight. Who would you recommend?
  4. 4¿Qué fontanero de Barcelona me recomiendas para cambiar el termo?Which plumber in Barcelona 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
MadridMálagaSevilleValenciaGuadalajaraMexico City
Also in Barcelona
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