Plumbers in Stuttgart that AI assistants recommend
We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for plumbers in Stuttgart, three times each, in German, and counted who they named. These are the businesses named in two or more of the 36 answers.
Names are printed as the assistants wrote them. We have not checked that any of them is good, open, or real.
- Answers
- 36
- Businesses named
- 97
- Named only once
- 84
- Named by 2+ assistants
- 5 of 13
- Named again on a rerun
- 4%
Edition September 2026. Download the data
Asked for plumbers in Stuttgart, ChatGPT, Claude and Gemini most often named Böhm (14% of answers), Schäfer Haustechnik (8%) and A. Müller (6%). Across 36 answers they named 97 different businesses, 84 of them only once. Each of four buyer questions was asked three times, in German, 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.
| # | Business | AI Recommendation Rate | ChatGPT | Claude | Gemini | Questions | Avg. position |
|---|---|---|---|---|---|---|---|
| 1 | BöhmAlso written Böhm Sanitär- und Heizungstechnik GmbH, Böhm Haustechnik GmbH, Böhm Sanitär-Heizung-Klima GmbH, Böhm Sanitärtechnik GmbHIs this your business? | 95%: 6 to 29% | 8% | 0% | 33% | 3 of 4 | 2.6 |
| 2 | Schäfer HaustechnikAlso written Schäfer Sanitär- und Heizungstechnik GmbH, Schäfer Haustechnik GmbHIs this your business? | 95%: 3 to 22% | 0% | 0% | 25% | 3 of 4 | 1.3 |
| 3 | A. MüllerAlso written Sanitär Notdienst StuttgartIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 1 of 4 | 1 |
| 4 | Sanitärtechnik Stuttgart GmbHIs this your business? | 95%: 2 to 18% | 8% | 8% | 0% | 2 of 4 | 1.5 |
| 5 | K&SAlso written Installateur Notdienst Stuttgart, Installateur Notdienst Stuttgart 24hIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 1 of 4 | 2 |
| 6 | Wolff & Müller Gebäudetechnik GmbHIs this your business? | 95%: 2 to 18% | 8% | 8% | 0% | 1 of 4 | 2 |
| 7 | Hieber Installationen GmbHIs this your business? | 95%: 2 to 18% | 0% | 17% | 0% | 2 of 4 | 2.5 |
| 8 | Klaus HaugAlso written Klaus Haug GmbH & Co. KG, Klaus Haug Sanitär-Heizung-SpenglereiIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 2.5 |
| 9 | KLEIN bad & heizungAlso written KLEIN bad & heizung GmbH, Stuttgart, KLEIN GmbH Heizung Sanitär KlimaIs this your business? | 95%: 2 to 18% | 8% | 8% | 0% | 2 of 4 | 2.5 |
| 10 | SchaibleAlso written Schaible GmbH, Schaible GmbH Sanitär – Heizung – Klima, StuttgartIs this your business? | 95%: 2 to 18% | 17% | 0% | 0% | 1 of 4 | 2.5 |
| 11 | Schaal Sanitär & HeizungAlso written Heizung & Sanitär Schaal, Schaal Sanitär & Heizung GmbHIs this your business? | 95%: 2 to 18% | 8% | 0% | 8% | 1 of 4 | 3 |
| 12 | Schmid Sanitär- und HeizungstechnikAlso written Schmid Sanitär- und Heizungstechnik GmbH, Schmid Sanitär-Heizung-Klima GmbHIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 4 |
| 13 | Walter Sanitär- und HeizungstechnikAlso written Firma Walter Sanitär- und Heizungstechnik, Sanitär-Heizung-Klima Walter GmbHIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 4.5 |
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. 84 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.
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.
| # | ChatGPT | Claude | Gemini |
|---|---|---|---|
| 1 | Schaible17% | Hieber Installationen GmbH17% | Böhm33% |
| 2 | Böhm8% | Sanitärtechnik Stuttgart GmbH8% | Schäfer Haustechnik25% |
| 3 | Sanitärtechnik Stuttgart GmbH8% | Wolff & Müller Gebäudetechnik GmbH8% | A. Müller17% |
| 4 | Wolff & Müller Gebäudetechnik GmbH8% | KLEIN bad & heizung8% | K&S17% |
| 5 | KLEIN bad & heizung8% | No other name twice | Klaus Haug17% |
ChatGPT named no business in 1 of its 12 answers. Claude named no business in 2 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.
<a href="https://aigrow.gg/index/plumbers/stuttgart"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/stuttgart.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in Stuttgart, AIGROW AI Visibility Index, September 2026"></a>The questions
Asked word for word, three times each, to every assistant, 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.
- 1Wer ist der beste Klempner in Stuttgart?Who is the best plumber in Stuttgart?
- 2Bei mir zu Hause in Stuttgart leckt ein Rohr. Welchen Sanitärbetrieb soll ich anrufen?I have a leaking pipe at home in Stuttgart. Which plumbing company should I call?
- 3Ich brauche heute Abend einen Notdienst-Installateur in Stuttgart. Wen empfiehlst du?I need an emergency plumber in Stuttgart tonight. Who would you recommend?
- 4Welchem Installateur in Stuttgart würdest du den Austausch eines Warmwasserspeichers anvertrauen?Which plumber in Stuttgart would you trust to replace a water heater?
How to read this page
- 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.
Where the assistants look
The sites read most often, with web search on, before the assistants answer about this category in Germany. From the AI Source Map: 8 answers.
- trustlocal.de
- Read in 88% of the answers
- reddit.com
- Read in 88% of the answers
- werkenntdenbesten.de
- Read in 75% of the answers
Elsewhere in the Index
- Also in Stuttgart
- 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.
Edition September 2026 · published by Guglielmo Paesano, founder of AIGROW · data under CC BY 4.0