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AI Visibility Index · September 2026

Plumbers in Berlin that AI assistants recommend

We asked ChatGPT, Claude, Gemini and Grok the four questions a buyer asks when looking for plumbers in Berlin, three times each, in German, 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 · Berlin
25%of answers named B&O Service Berlin GmbH
Answers
48
Businesses named
73
Named only once
53
Named by 2+ assistants
11 of 20
Named again on a rerun
16%

Edition September 2026. Download the data

Asked for plumbers in Berlin, ChatGPT, Claude, Gemini and Grok most often named B&O Service Berlin GmbH (25% of answers), Sanitär-Notdienst Berlin (10%) and Bär & Ollenroth KG (8%). Across 48 answers they named 73 different businesses, 53 of them only once. Each of four buyer questions was asked three times, in German, 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 Berlin named by AI assistants, September 2026
#BusinessShareChatGPTClaudeGeminiGrokQuestionsAvg. position
1B&O Service Berlin GmbH25%95%: 15 to 39%58%42%0%0%4 of 41.7
2Sanitär-Notdienst Berlin10%95%: 5 to 22%0%0%42%0%2 of 42.6
3Bär & Ollenroth KG8%95%: 3 to 20%8%25%0%0%3 of 41
4Sanitär Notdienst Berlin 24h (B&S)Also written Sanitär Notdienst Berlin 24h, Sanitär Berlin 24h Notdienst, Sanitär-Notdienst Berlin 24h8%95%: 3 to 20%8%0%25%0%2 of 42
5Harry Olivier GmbH8%95%: 3 to 20%8%25%0%0%3 of 42.3
6B&O Gruppe Berlin6%95%: 2 to 17%8%8%8%0%2 of 41
7Böhm & SohnAlso written Böhm & Sohn GmbH, Böhm & Sohn Sanitär- und Heizungstechnik GmbH6%95%: 2 to 17%0%0%25%0%2 of 41
8Aira BerlinAlso written AIRA Berlin6%95%: 2 to 17%17%8%0%0%1 of 41.3
9Installateur Notdienst Berlin6%95%: 2 to 17%0%0%25%0%1 of 41.3
10Bärenstark HaustechnikAlso written Bärenstark Haustechnik Berlin, Bärenstark Haustechnik GmbH6%95%: 2 to 17%8%17%0%0%2 of 42
11BuderusAlso written Buderus Kundendienst, Buderus Service Berlin6%95%: 2 to 17%8%0%17%0%2 of 42.3
12Berliner WasserbetriebeAlso written Berliner Wasserwerke6%95%: 2 to 17%0%8%17%0%3 of 42.7
13Berliner Rohrreinigung & Sanitär Notdienst6%95%: 2 to 17%0%0%25%0%2 of 43
14Klaus-Dieter MüllerAlso written Klaus-Dieter Müller Sanitär- und Heizungstechnik, Klaus-Dieter Müller Sanitärinstallation, Klaus-Dieter Müller Sanitärinstallationen6%95%: 2 to 17%0%0%25%0%3 of 44
15AIRA HaustechnikAlso written AIRA Haustechnik Berlin, AIRA Haustechnik GmbH4%95%: 1 to 14%17%0%0%0%1 of 41
16Thermondo GmbH4%95%: 1 to 14%0%0%17%0%1 of 41
17Birkholz Sanitär- und Heizungstechnik GmbH4%95%: 1 to 14%17%0%0%0%2 of 41.5
18A&O HaustechnikAlso written A&O Haustechnik Berlin, A&O Haustechnik GmbH4%95%: 1 to 14%8%8%0%0%1 of 42.5
19H. Ehlert GmbH4%95%: 1 to 14%8%8%0%0%2 of 43
20Klempner Notdienst Berlin4%95%: 1 to 14%0%0%17%0%1 of 43.5

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. 53 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
1B&O Service Berlin GmbH58%B&O Service Berlin GmbH42%Sanitär-Notdienst Berlin42%Named no business
2Aira Berlin17%Bär & Ollenroth KG25%Sanitär Notdienst Berlin 24h (B&S)25%
3AIRA Haustechnik17%Harry Olivier GmbH25%Böhm & Sohn25%
4Birkholz Sanitär- und Heizungstechnik GmbH17%Bärenstark Haustechnik17%Installateur Notdienst Berlin25%
5Bär & Ollenroth KG8%B&O Gruppe Berlin8%Berliner Rohrreinigung & Sanitär Notdienst25%

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

The questions

Asked word for word, three times each, to every assistant through its API, in German. 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. 1Wer ist der beste Klempner in Berlin?Who is the best plumber in Berlin?
  2. 2Bei mir zu Hause in Berlin leckt ein Rohr. Welchen Sanitärbetrieb soll ich anrufen?I have a leaking pipe at home in Berlin. Which plumbing company should I call?
  3. 3Ich brauche heute Abend einen Notdienst-Installateur in Berlin. Wen empfiehlst du?I need an emergency plumber in Berlin tonight. Who would you recommend?
  4. 4Welchem Installateur in Berlin würdest du den Austausch eines Warmwasserspeichers anvertrauen?Which plumber in Berlin 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
HamburgMunichBaselSalzburgViennaZurich
Also in Berlin
DentistsLawyersAccountantsGymsReal estate agencies

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Edition September 2026 · data under CC BY 4.0