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AI Visibility Index · September 2026

Plumbers in Lausanne that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for plumbers in Lausanne, three times each, in French, 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.

Plumbers · Lausanne
28%of answers named SOS Plombier
Answers
36
Businesses named
65
Named only once
42
Named by 2+ assistants
10 of 23
Named again on a rerun
22%

Edition September 2026. Download the data

Asked for plumbers in Lausanne, ChatGPT, Claude and Gemini most often named SOS Plombier (28% of answers), Espace Sanitaire SA (22%) and Bati-Service (19%). Across 36 answers they named 65 different businesses, 42 of them only once. Each of four buyer questions was asked three times, in French, 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.

Plumbers in Lausanne named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1SOS PlombierAlso written SOS Plombier Lausanne, Dépannage Sanitaire 24/24, SOS Plomberie LausanneIs this your business?28%95%: 16 to 44%25%25%33%2 of 41.7
2Espace Sanitaire SAIs this your business?22%95%: 12 to 38%0%0%67%3 of 43.4
3Bati-ServiceAlso written Bati-Service SA, Bati-Services SA, Bati-Service LausanneIs this your business?19%95%: 10 to 35%0%0%58%3 of 41.6
4BuchardAlso written Buchard SA, Buchard Sanitaire SAIs this your business?14%95%: 6 to 29%8%33%0%3 of 42.4
5SanitärAlso written Sanitaire Lausanne SA, Sanitär Lausanne SàrlIs this your business?11%95%: 4 to 25%0%8%25%2 of 41.5
6Sanitas TroeschAlso written Sanitas Troesch AG – Lausanne, Sanitas Troesch SA, Sanitas Troesch SA – LausanneIs this your business?11%95%: 4 to 25%25%8%0%2 of 41.5
7SanitechAlso written Sanitech Lausanne SA, Sanitec Services SA, Sanitech SAIs this your business?11%95%: 4 to 25%8%25%0%3 of 42.3
8Riedo ClimaAlso written Riedo Clima AG – Lausanne, Riedo Clima AG Lausanne, Riedo Clima SA – LausanneIs this your business?11%95%: 4 to 25%33%0%0%2 of 42.5
9SanitechniqueAlso written Plomberie Lausanne, Sani-Technique SA, Sanitechnique SAIs this your business?11%95%: 4 to 25%8%0%25%2 of 43.3
10Bati-SanitaireAlso written Bati-Sanitaire SA, Bati-Sanitaire SàrlIs this your business?8%95%: 3 to 22%0%0%25%1 of 42
11Etablissements Techniques Fragnière SAIs this your business?8%95%: 3 to 22%17%8%0%3 of 42.3
12Groupe E Celsius SAIs this your business?8%95%: 3 to 22%17%8%0%1 of 42.3
13Plomberie du LacAlso written Plomberie du Lac SàrlIs this your business?8%95%: 3 to 22%0%0%25%1 of 43
14Sani-Vaud SAIs this your business?6%95%: 2 to 18%0%0%17%2 of 42
15Sanibat SAIs this your business?6%95%: 2 to 18%0%17%0%2 of 42
16SaniGroupeAlso written Sanigroup Sàrl, SaniGroupe SAIs this your business?6%95%: 2 to 18%17%0%0%2 of 42
17Sanitaire Express LausanneIs this your business?6%95%: 2 to 18%0%0%17%2 of 42
18Brauchli SAIs this your business?6%95%: 2 to 18%17%0%0%2 of 42.5
19Plomberie Sanitaire Lausanne SàrlIs this your business?6%95%: 2 to 18%17%0%0%1 of 42.5
20Plombier ExpressAlso written Plombier Express Lausanne, Plombier Lausanne ExpressIs this your business?6%95%: 2 to 18%0%0%17%1 of 42.5
21Sanicentre SAIs this your business?6%95%: 2 to 18%8%8%0%2 of 42.5
22Plombier 24/7Also written Plombier Lausanne, Plombier Lausanne 24/7Is this your business?6%95%: 2 to 18%0%8%8%2 of 43
23Vaud SanitaireAlso written Vaud Sanitaire SA, Vaud Sanitaire SàrlIs this your business?6%95%: 2 to 18%0%0%17%1 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. 42 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
1Riedo Clima33%Buchard33%Espace Sanitaire SA67%
2SOS Plombier25%SOS Plombier25%Bati-Service58%
3Sanitas Troesch25%Sanitech25%SOS Plombier33%
4Etablissements Techniques Fragnière SA17%Sanibat SA17%Sanitär25%
5Groupe E Celsius SA17%Sanitär8%Sanitechnique25%

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

The questions

Asked word for word, three times each, to every assistant, in French. 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. 1Quel est le meilleur plombier à Lausanne ?Who is the best plumber in Lausanne?
  2. 2J’ai une fuite chez moi à Lausanne. Quelle entreprise sanitaire dois-je appeler ?I have a leaking pipe at home in Lausanne. Which plumbing company should I call?
  3. 3J’ai besoin d’un plombier en urgence ce soir à Lausanne. Tu me recommanderais qui ?I need an emergency plumber in Lausanne tonight. Who would you recommend?
  4. 4Quel plombier à Lausanne choisirais-tu pour remplacer un chauffe-eau ?Which plumber in Lausanne 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
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
local.ch
Read in 100% of the answers
reddit.com
Read in 86% of the answers
search.ch
Read in 71% of the answers

Elsewhere in the Index

Plumbers elsewhere
BaselBernGenevaLuganoZurichBordeaux
Also in Lausanne
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.

Run the free AI scanRead the method

Edition September 2026 · published by Guglielmo Paesano, founder of AIGROW · data under CC BY 4.0