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AI Visibility Index · September 2026

Plumbers in Rotterdam that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for plumbers in Rotterdam, three times each, in Dutch, 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 · Rotterdam
42%of answers named Feenstra
Answers
36
Businesses named
40
Named only once
23
Named by 2+ assistants
10 of 17
Named again on a rerun
41%

Edition September 2026. Download the data

Asked for plumbers in Rotterdam, ChatGPT, Claude and Gemini most often named Feenstra (42% of answers), RRS Riool Reinigings Service (33%) and Loodgieter Rotterdam 24/7 (28%). Across 36 answers they named 40 different businesses, 23 of them only once. Each of four buyer questions was asked three times, in Dutch, 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 Rotterdam named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1FeenstraAlso written Feenstra RotterdamIs this your business?42%95%: 27 to 58%67%58%0%4 of 42.3
2RRS Riool Reinigings ServiceAlso written RRS Rotterdam, RRS, RRS RioolreinigingIs this your business?33%95%: 20 to 50%33%67%0%3 of 42
3Loodgieter Rotterdam 24/7Also written Loodgietersbedrijf Rotterdam 24/7Is this your business?28%95%: 16 to 44%42%8%33%3 of 41.3
4Loodgieter.nlAlso written Loodgietersbedrijf RotterdamIs this your business?28%95%: 16 to 44%0%8%75%4 of 41.6
5Loodgieter RotterdamIs this your business?25%95%: 14 to 41%42%33%0%3 of 41.2
6010 LoodgieterIs this your business?19%95%: 10 to 35%0%0%58%3 of 42
7Van der Velden RioleringsbeheerAlso written Van der Velden Rioleringsbeheer RotterdamIs this your business?17%95%: 8 to 32%33%17%0%3 of 42.3
8Loodgietersbedrijf De KoningIs this your business?14%95%: 6 to 29%0%0%42%2 of 43.4
9Spoed Loodgieter RotterdamIs this your business?11%95%: 4 to 25%0%0%33%2 of 43
10Van der MeerAlso written Installatiebedrijf Van der Meer, Loodgietersbedrijf Van der Meer, Van der Meer LoodgietersbedrijfIs this your business?11%95%: 4 to 25%0%0%33%3 of 43
11Van der VeldenAlso written Loodgietersbedrijf Van der Velden, Loodgietersbedrijf Van der Velden Rotterdam, Van der Velden Installatiebedrijven RotterdamIs this your business?8%95%: 3 to 22%0%17%8%3 of 41.7
12Van Dijk InstallatiesAlso written Van Dijk Installaties RotterdamIs this your business?8%95%: 3 to 22%17%8%0%1 of 42.3
13Klusbedrijf RotterdamIs this your business?8%95%: 3 to 22%8%17%0%1 of 43
14Van der Velde InstallatieAlso written Van der Velde InstallatiebedrijfIs this your business?6%95%: 2 to 18%17%0%0%2 of 42
15Van der Wel LoodgietersAlso written Loodgietersbedrijf Van der WelIs this your business?6%95%: 2 to 18%8%8%0%2 of 42
16De Rotterdamse LoodgieterIs this your business?6%95%: 2 to 18%0%0%17%1 of 42.5
17Installatiebedrijf De JongIs this your business?6%95%: 2 to 18%0%0%17%1 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. 23 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
1Feenstra67%RRS Riool Reinigings Service67%Loodgieter.nl75%
2Loodgieter Rotterdam 24/742%Feenstra58%010 Loodgieter58%
3Loodgieter Rotterdam42%Loodgieter Rotterdam33%Loodgietersbedrijf De Koning42%
4RRS Riool Reinigings Service33%Van der Velden Rioleringsbeheer17%Loodgieter Rotterdam 24/733%
5Van der Velden Rioleringsbeheer33%Van der Velden17%Spoed Loodgieter Rotterdam33%

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

The questions

Asked word for word, three times each, to every assistant, in Dutch. 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. 1Wie is de beste loodgieter in Rotterdam?Who is the best plumber in Rotterdam?
  2. 2Ik heb thuis in Rotterdam een lekkende leiding. Welk loodgietersbedrijf kan ik het beste bellen?I have a leaking pipe at home in Rotterdam. Which plumbing company should I call?
  3. 3Ik heb vanavond in Rotterdam een loodgieter nodig voor een noodgeval. Wie raad je aan?I need an emergency plumber in Rotterdam tonight. Who would you recommend?
  4. 4Welke loodgieter in Rotterdam zou jij vertrouwen om mijn boiler te vervangen?Which plumber in Rotterdam 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 the Netherlands. From the AI Source Map: 5 answers.

See every site for this category
trustoo.nl
Read in 100% of the answers
werkspot.nl
Read in 80% of the answers
lecoskeuze.nl
Read in 80% of the answers

Elsewhere in the Index

Plumbers elsewhere
AmsterdamThe HagueUtrechtAntwerpGhentAarhus
Also in Rotterdam
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