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AI Visibility Index · September 2026

Roofers in Zurich that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for roofers in Zurich, three times each, in German, 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.

Roofers · Zurich
28%of answers named H.P. Gasser
Answers
36
Businesses named
25
Named only once
10
Named by 2+ assistants
0 of 15
Named again on a rerun
49%

Edition September 2026. Download the data

Asked for roofers in Zurich, ChatGPT, Claude and Gemini most often named H.P. Gasser (28% of answers), Scherrer Metec AG (25%) and Keller (25%). Across 36 answers they named 25 different businesses, 10 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.

Roofers in Zurich named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1H.P. GasserAlso written H.P. Gasser AG, Spenglerei & Dachdeckerei H.P. Gasser AGIs this your business?28%95%: 16 to 44%0%0%83%4 of 41
2Scherrer Metec AGIs this your business?25%95%: 14 to 41%75%0%0%4 of 41.6
3KellerAlso written Spenglerei & Dachdeckerei Keller AG, Dachdeckerei & Spenglerei Keller AGIs this your business?25%95%: 14 to 41%0%0%75%4 of 42.3
4Dach & WandAlso written Dach & Wand AG Zürich, Dach + Wand AG Zürich, Dach & Wand AGIs this your business?14%95%: 6 to 29%0%0%42%3 of 42.6
5Zürcher DachbauAlso written Zürcher Dachbau AG, Zürcher Dachbau GmbHIs this your business?14%95%: 6 to 29%0%0%42%4 of 44.2
6TECTONAlso written TECTON AG, TECTON AG ZürichIs this your business?11%95%: 4 to 25%33%0%0%2 of 41.3
7Dachbau Zürich AGIs this your business?8%95%: 3 to 22%0%0%25%3 of 42
8Willi DachbauAlso written Willi Dachbau AG, Willi Dach AGIs this your business?8%95%: 3 to 22%0%0%25%2 of 43.3
9Bärtsch DachbauAlso written Bärtsch Dach & Fassade AG, Bärtsch Dachbau AGIs this your business?8%95%: 3 to 22%0%0%25%2 of 43.7
10Zürcher Dach- und FassadenbauAlso written Zürcher Dach & Fassaden GmbH, Zürcher Dach- und Fassadenbau GmbHIs this your business?8%95%: 3 to 22%0%0%25%2 of 44.3
11SADA AGIs this your business?6%95%: 2 to 18%17%0%0%2 of 41
12Schoop + Co. AGIs this your business?6%95%: 2 to 18%17%0%0%1 of 41.5
13Spenglerei & Dachdeckerei H.P. Giger AGIs this your business?6%95%: 2 to 18%0%0%17%2 of 41.5
14Baur DachbauAlso written Baur Dach AG, Baur Dachbau AGIs this your business?6%95%: 2 to 18%0%0%17%1 of 44
15Bürgin Dachbau AGIs this your business?6%95%: 2 to 18%0%0%17%2 of 44

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. 10 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
1Scherrer Metec AG75%Named no businessH.P. Gasser83%
2TECTON33%Keller75%
3SADA AG17%Dach & Wand42%
4Schoop + Co. AG17%Zürcher Dachbau42%
5No other name twiceDachbau Zürich AG25%

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.

Correct or remove a listing
Named by AI assistants: Roofers in Zurich, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/roofers/zurich"><img src="https://aigrow.gg/badges/index/2026-09/roofers/zurich.svg" width="312" height="100" alt="Named by AI assistants: Roofers in Zurich, 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.

  1. 1Wer ist der beste Dachdecker in Zürich?Who is the best roofer in Zurich?
  2. 2Das Dach meines Hauses in Zürich ist undicht. Welche Dachdeckerfirma soll ich anrufen?My roof is leaking in Zurich. Which roofing company should I call?
  3. 3Welchen Dachdecker in Zürich würdest du für eine komplette Neueindeckung meines Dachs empfehlen?Which roofing contractor in Zurich would you recommend for a full roof replacement?
  4. 4Welcher Dachdecker in Zürich kann mein Dach nach einem Sturm begutachten?Which roofer in Zurich can inspect my roof after a storm?

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.

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.

See every site for this category
localsearch.ch
Read in 86% of the answers
local.ch
Read in 71% of the answers
search.ch
Read in 57% of the answers

Elsewhere in the Index

Roofers elsewhere
BaselBernGenevaLausanneLuganoBerlin
Also in Zurich
DentistsLawyersAccountantsPlumbersGymsReal estate agencies

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