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AI Visibility Index · September 2026

Plumbers in The Hague that AI assistants recommend

We asked ChatGPT, Claude and Gemini the four questions a buyer asks when looking for plumbers in The Hague, 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 · The Hague
42%of answers named Feenstra
Answers
36
Businesses named
38
Named only once
21
Named by 2+ assistants
7 of 17
Named again on a rerun
42%

Edition September 2026. Download the data

Asked for plumbers in The Hague, ChatGPT, Claude and Gemini most often named Feenstra (42% of answers), Loodgieter Den Haag (39%) and Van der Velden (39%). Across 36 answers they named 38 different businesses, 21 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 The Hague named by AI assistants, September 2026
#BusinessAI Recommendation RateChatGPTClaudeGeminiQuestionsAvg. position
1FeenstraAlso written Feenstra Den HaagIs this your business?42%95%: 27 to 58%67%58%0%4 of 42.7
2Loodgieter Den HaagIs this your business?39%95%: 25 to 55%67%42%8%4 of 41
3Van der VeldenAlso written Loodgietersbedrijf Den Haag, Loodgietersbedrijf Van der Velden, Van der Velden Rioleringsbeheer Den HaagIs this your business?39%95%: 25 to 55%17%8%92%4 of 41.3
4Van der VeldeAlso written Van der Velde Loodgieters, Van der Velde Installatie, Loodgietersbedrijf Van der Velde, Loodgietersbedrijf Van der Velde Den HaagIs this your business?36%95%: 23 to 52%50%58%0%4 of 42.1
5Loodgieter Den Haag 24/7Also written Loodgietersbedrijf Den Haag 24/7Is this your business?22%95%: 12 to 38%25%25%17%2 of 41.4
6RRS Riool Reinigings ServiceAlso written RRS, RRS Riool Reiniging Service, RRS RioolserviceIs this your business?19%95%: 10 to 35%8%50%0%3 of 42.7
7Van Dijk InstallatiesAlso written Van Dijk Installaties Den HaagIs this your business?14%95%: 6 to 29%25%17%0%3 of 42.2
8Rioolservice Den HaagIs this your business?14%95%: 6 to 29%0%0%42%2 of 42.4
9Loodgietersbedrijf De KoningIs this your business?8%95%: 3 to 22%0%0%25%2 of 42.7
10Van der HeijdenAlso written Loodgietersbedrijf Van der Heijden, Installatiebedrijf Van der HeijdenIs this your business?8%95%: 3 to 22%0%0%25%2 of 43
11Van der MeerAlso written Installatiebedrijf Van der Meer, Loodgietersbedrijf Van der MeerIs this your business?8%95%: 3 to 22%0%0%25%3 of 44
12De LoodgietersbrigadeIs this your business?6%95%: 2 to 18%0%0%17%1 of 42
13Eneco InstallatiebedrijvenIs this your business?6%95%: 2 to 18%0%17%0%1 of 42
14Installatiebedrijf De Jong & RoosIs this your business?6%95%: 2 to 18%0%0%17%1 of 42
15Installatiebedrijf De Jong & ZoonIs this your business?6%95%: 2 to 18%0%0%17%2 of 42
16Van Dijk LoodgietersIs this your business?6%95%: 2 to 18%17%0%0%2 of 42
17Loodgieter.nlIs this your business?6%95%: 2 to 18%0%0%17%1 of 44.5

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. 21 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%Feenstra58%Van der Velden92%
2Loodgieter Den Haag67%Van der Velde58%Rioolservice Den Haag42%
3Van der Velde50%RRS Riool Reinigings Service50%Loodgietersbedrijf De Koning25%
4Loodgieter Den Haag 24/725%Loodgieter Den Haag42%Van der Heijden25%
5Van Dijk Installaties25%Loodgieter Den Haag 24/725%Van der Meer25%

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 The Hague, AIGROW AI Visibility Index, September 2026
<a href="https://aigrow.gg/index/plumbers/the-hague"><img src="https://aigrow.gg/badges/index/2026-09/plumbers/the-hague.svg" width="312" height="100" alt="Named by AI assistants: Plumbers in The Hague, 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 Den Haag?Who is the best plumber in The Hague?
  2. 2Ik heb thuis in Den Haag een lekkende leiding. Welk loodgietersbedrijf kan ik het beste bellen?I have a leaking pipe at home in The Hague. Which plumbing company should I call?
  3. 3Ik heb vanavond in Den Haag een loodgieter nodig voor een noodgeval. Wie raad je aan?I need an emergency plumber in The Hague tonight. Who would you recommend?
  4. 4Welke loodgieter in Den Haag zou jij vertrouwen om mijn boiler te vervangen?Which plumber in The Hague 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
AmsterdamRotterdamUtrechtAntwerpGhentAarhus
Also in The Hague
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