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AI Visibility Index · September 2026

Plumbers in Oslo that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for plumbers in Oslo, three times each, in Norwegian, and counted who they named. These are the businesses named in two or more of the 36 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 · Oslo
75%of answers named Rørlegger Sentralen
Answers
36
Businesses named
32
Named only once
15
Named by 2+ assistants
9 of 17
Named again on a rerun
46%

Edition September 2026. Download the data

Asked for plumbers in Oslo, ChatGPT, Claude and Gemini most often named Rørlegger Sentralen (75% of answers), Oslo VVS Senter (47%) and Comfort (39%). Across 36 answers they named 32 different businesses, 15 of them only once. Each of four buyer questions was asked three times, in Norwegian, in September 2026.

The ranking

The AI Recommendation Rate is the fraction of the 36 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 Oslo named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1Rørlegger SentralenAlso written Rørlegger Sentralen AS, Rørlegger Centralen ASIs this your business?75%95%: 59 to 86%92%83%50%4 of 41.2
2Oslo VVS SenterAlso written Oslo VVS Senter ASIs this your business?47%95%: 32 to 63%92%17%33%4 of 42
3ComfortAlso written Comfort Oslo, Comfort Oslo – Sanitary AS, Comfort Rørleggerne Oslo, Rørlegger'n Oslo ASIs this your business?39%95%: 25 to 55%17%0%100%4 of 42.7
4Oslo Rørleggerbedrift ASIs this your business?31%95%: 18 to 47%0%33%58%4 of 43.1
5BademiljøAlso written Bademiljø Oslo – Rørlegger Sentralen ASIs this your business?19%95%: 10 to 35%0%8%50%3 of 43.3
6Christiania Rørleggerbedrift ASIs this your business?17%95%: 8 to 32%0%50%0%4 of 43.3
7VVS EkspertenIs this your business?14%95%: 6 to 29%0%0%42%3 of 43.2
8RørleggervaktaAlso written Rørleggervakta AS, Rørleggervakta Oslo ASIs this your business?11%95%: 4 to 25%8%25%0%3 of 42.3
9RørleggerVaktAlso written Rørlegger-Vakt Oslo, RørleggerVakt Oslo, RørleggerVakten OsloIs this your business?8%95%: 3 to 22%0%0%25%1 of 41
10Rørlegger Oslo ASIs this your business?8%95%: 3 to 22%0%8%17%2 of 42
11VVS Gruppen ASIs this your business?8%95%: 3 to 22%0%25%0%2 of 42
12Sentrum RørAlso written Sentrum Rørservice AS, Sentrum Rør ASIs this your business?8%95%: 3 to 22%0%0%25%1 of 42.7
13VBAlso written VB Gruppen Oslo, VB Oslo Rør AS, VB Rørservice Oslo ASIs this your business?8%95%: 3 to 22%17%8%0%3 of 43
14Brødrene DahlAlso written Brødrene Dahl Rørservice AS, Brødrene Dahl VVS Service ASIs this your business?6%95%: 2 to 18%0%17%0%2 of 42.5
15Norsk Rørservice ASIs this your business?6%95%: 2 to 18%8%8%0%2 of 42.5
16Vann og Avløpsteknikk ASIs this your business?6%95%: 2 to 18%0%17%0%2 of 42.5
17Vann & Avløp ASIs this your business?6%95%: 2 to 18%17%0%0%2 of 43

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. 15 more names came up in a single answer and are counted above but not listed.

Is this your business?

See what the assistants say about your business today. The free checker asks ChatGPT, Claude, Gemini and Grok two of the Index questions for this category, with the category and the place already filled in, and shows every answer word for word. About 30 seconds, no sign-up.

Check your businessNamed above? Add the badgeWhat the audit does

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.

#ChatGPTClaudeGemini
1Rørlegger Sentralen92%Rørlegger Sentralen83%Comfort100%
2Oslo VVS Senter92%Christiania Rørleggerbedrift AS50%Oslo Rørleggerbedrift AS58%
3Comfort17%Oslo Rørleggerbedrift AS33%Rørlegger Sentralen50%
4VB17%Rørleggervakta25%Bademiljø50%
5Vann & Avløp AS17%VVS Gruppen AS25%VVS Eksperten42%

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

The questions

Asked word for word, three times each, to every assistant, in Norwegian. 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. 1Hvem er den beste rørleggeren i Oslo?Who is the best plumber in Oslo?
  2. 2Jeg har et rør som lekker hjemme i Oslo. Hvilket rørleggerfirma bør jeg ringe?I have a leaking pipe at home in Oslo. Which plumbing company should I call?
  3. 3Jeg trenger en rørlegger på vakt i Oslo i kveld. Hvem vil du anbefale?I need an emergency plumber in Oslo tonight. Who would you recommend?
  4. 4Hvilken rørlegger i Oslo ville du stolt på til å skifte ut en varmtvannsbereder?Which plumber in Oslo 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
36 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
BergenAarhusAmsterdamAntwerpAustinBarcelona
Also in Oslo
DentistsLawyersAccountantsGymsReal estate agenciesRestaurants

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.

Run the free AI scanRead the method

Edition September 2026 · published by Guglielmo Paesano, founder of AIGROW · data under CC BY 4.0