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AI Visibility Index · September 2026

Plumbers in Munich that AI assistants recommend

We asked ChatGPT, Claude, Gemini and Grok the four questions a buyer asks when looking for plumbers in Munich, 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 · Munich
15%of answers named Sanitär-Notdienst München
Answers
48
Businesses named
76
Named only once
61
Named by 2+ assistants
4 of 15
Named again on a rerun
11%

Edition September 2026. Download the data

Asked for plumbers in Munich, ChatGPT, Claude, Gemini and Grok most often named Sanitär-Notdienst München (15% of answers), Schmidbauer Haustechnik (13%) and Hieber Installationen (10%). Across 48 answers they named 76 different businesses, 61 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 Munich named by AI assistants, September 2026
#BusinessShareChatGPTClaudeGeminiGrokQuestionsAvg. position
1Sanitär-Notdienst MünchenAlso written Sanitär Notdienst München15%95%: 7 to 27%0%0%58%0%3 of 42.3
2Schmidbauer HaustechnikAlso written Schmidbauer Haustechnik GmbH, Schmidbauer Sanitär & Heizung13%95%: 6 to 25%0%0%50%0%3 of 42.7
3Hieber InstallationenAlso written Hieber Installationen GmbH, Hieber Installationen GmbH, München, Hieber Installationen und Heizungsbau GmbH10%95%: 5 to 22%25%17%0%0%3 of 42.6
4A. Huber Sanitär und HeizungAlso written A. Huber Sanitär und Heizung GmbH, A. Huber Sanitär- und Heizungsnotdienst München, A. Huber Sanitär- und Heizungstechnik GmbH8%95%: 3 to 20%25%8%0%0%3 of 41.5
5Münchner RohrreinigungAlso written Münchner Rohrreinigung & Sanitär Notdienst, Münchner Rohrreinigung GmbH, Münchner Rohrreinigung und Sanitär Notdienst GmbH8%95%: 3 to 20%17%0%17%0%2 of 42.3
6Bayerische Haustechnik GmbH6%95%: 2 to 17%0%0%25%0%2 of 42
7Karl-Heinz Schmitt Sanitär- und HeizungstechnikAlso written K. H. Schmitt GmbH Sanitär- und Heizungstechnik, Karl-Heinz Schmitt GmbH Sanitär-Heizung-Klima München, Sanitär Heizung Klima K. H. Schmitt GmbH6%95%: 2 to 17%17%8%0%0%1 of 42
8Bayerische Wärmeversorgung GmbH4%95%: 1 to 14%0%0%17%0%1 of 41
9Installateur Notdienst München4%95%: 1 to 14%0%0%17%0%1 of 41
10Heizung & Sanitär MünchenAlso written Heizung & Sanitär München GmbH4%95%: 1 to 14%0%0%17%0%1 of 41.5
11Hofmann & Söhne GmbH4%95%: 1 to 14%0%0%17%0%2 of 42
12Müller & Sohn SanitärtechnikAlso written Müller & Sohn Sanitärtechnik GmbH4%95%: 1 to 14%0%0%17%0%2 of 42
13Schmid Sanitär & HeizungAlso written Schmid Sanitär & Heizung GmbH, Schmid Sanitär- und Heizungstechnik GmbH4%95%: 1 to 14%0%0%17%0%2 of 42
14Münchner Sanitär NotdienstAlso written Münchner Sanitär-Notdienst4%95%: 1 to 14%0%0%17%0%2 of 43
15Wimmer Haustechnik GmbH4%95%: 1 to 14%0%0%17%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. 61 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
1Hieber Installationen25%Hieber Installationen17%Sanitär-Notdienst München58%Named no business
2A. Huber Sanitär und Heizung25%A. Huber Sanitär und Heizung8%Schmidbauer Haustechnik50%
3Münchner Rohrreinigung17%Karl-Heinz Schmitt Sanitär- und Heizungstechnik8%Bayerische Haustechnik GmbH25%
4Karl-Heinz Schmitt Sanitär- und Heizungstechnik17%No other name twiceMünchner Rohrreinigung17%
5No other name twiceBayerische Wärmeversorgung GmbH17%

ChatGPT named no business in 2 of its 12 answers. Claude named no business in 2 of its 12 answers. 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 Munich, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/plumbers/munich"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/munich.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in Munich, 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 München?Who is the best plumber in Munich?
  2. 2Bei mir zu Hause in München leckt ein Rohr. Welchen Sanitärbetrieb soll ich anrufen?I have a leaking pipe at home in Munich. Which plumbing company should I call?
  3. 3Ich brauche heute Abend einen Notdienst-Installateur in München. Wen empfiehlst du?I need an emergency plumber in Munich tonight. Who would you recommend?
  4. 4Welchem Installateur in München würdest du den Austausch eines Warmwasserspeichers anvertrauen?Which plumber in Munich 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
BerlinHamburgBaselSalzburgViennaZurich
Also in Munich
DentistsLawyersAccountantsGymsReal estate agencies

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Edition September 2026 · data under CC BY 4.0