Roofers in Basel that AI assistants recommend
We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for roofers in Basel, 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
- 18
- Named only once
- 8
- Named by 2+ assistants
- 0 of 10
- Named again on a rerun
- 44%
Edition September 2026. Download the data
Asked for roofers in Basel, ChatGPT, Claude and Gemini most often named Gysin Bedachungen AG (33% of answers), Bader Bedachungen AG (25%) and H.P. Gysin AG (22%). Across 36 answers they named 18 different businesses, 8 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 | Gysin Bedachungen AGIs this your business? | 95%: 20 to 50% | 0% | 0% | 100% | 4 of 4 | 1.1 |
| 2 | Bader Bedachungen AGIs this your business? | 95%: 14 to 41% | 0% | 0% | 75% | 4 of 4 | 3 |
| 3 | H.P. Gysin AGIs this your business? | 95%: 12 to 38% | 0% | 0% | 67% | 4 of 4 | 2.8 |
| 4 | Wüthrich Bedachungen AGIs this your business? | 95%: 6 to 29% | 0% | 0% | 42% | 3 of 4 | 4 |
| 5 | TECTON AGIs this your business? | 95%: 3 to 22% | 25% | 0% | 0% | 2 of 4 | 1 |
| 6 | Häring AGIs this your business? | 95%: 3 to 22% | 0% | 0% | 25% | 3 of 4 | 3 |
| 7 | Zimmermann BedachungenAlso written Zimmermann Bedachungen GmbH, Zimmermann Bedachungen AGIs this your business? | 95%: 3 to 22% | 0% | 0% | 25% | 2 of 4 | 3.7 |
| 8 | Bürgin Bedachungen AGIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 3 |
| 9 | Kunz Bedachungen AGIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 3 |
| 10 | Wullschleger AGIs this your business? | 95%: 2 to 18% | 0% | 0% | 17% | 2 of 4 | 4 |
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. 8 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 | TECTON AG25% | Named no business | Gysin Bedachungen AG100% |
| 2 | No other name twice | Bader Bedachungen AG75% | |
| 3 | H.P. Gysin AG67% | ||
| 4 | Wüthrich Bedachungen AG42% | ||
| 5 | Häring AG25% |
ChatGPT named no business in 9 of its 12 answers. Claude 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.
<a href="https://aigrow.gg/index/roofers/basel"><img src="https://aigrow.gg/badges/index/2026-09/roofers/basel.svg" width="312" height="100" alt="Named by AI assistants: Roofers in Basel, 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 Dachdecker in Basel?Who is the best roofer in Basel?
- 2Das Dach meines Hauses in Basel ist undicht. Welche Dachdeckerfirma soll ich anrufen?My roof is leaking in Basel. Which roofing company should I call?
- 3Welchen Dachdecker in Basel würdest du für eine komplette Neueindeckung meines Dachs empfehlen?Which roofing contractor in Basel would you recommend for a full roof replacement?
- 4Welcher Dachdecker in Basel kann mein Dach nach einem Sturm begutachten?Which roofer in Basel can inspect my roof after a storm?
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 Switzerland. From the AI Source Map: 7 answers.
- localsearch.ch
- Read in 86% of the answers
- local.ch
- Read in 71% of the answers
- search.ch
- Read in 57% of the answers
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