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AI Source Map · October 2026

Plumbers: the sites AI assistants read before they name one

108 answers from ChatGPT and Claude about plumbers in 20 countries, asked with web search on. For each site, the share of answers that read it and the share that cited it as the source of a business.

Plumbers
82%of answers read reddit.com
Answers
108
ChatGPT: searches per answer
3.4
Claude: searches per answer
1.9
Answers that read trustpilot.com
22%
Answers that read wikipedia.org
22%

Download the data as JSON

The sites read most for plumbers

Every country together. Under each assistant, the share of its own answers.

Compare assistant statistics
Plumbers
SiteReadCitedChatGPTClaude
reddit.comChatGPT 100% · Claude 0%82%7.4%100%0%
trustpilot.comChatGPT 17% · Claude 45%22%10%17%45%
wikipedia.orgChatGPT 27% · Claude 0%22%0%27%0%
consumeraffairs.comChatGPT 11% · Claude 5.0%10%6.5%11%5.0%
checkatrade.comChatGPT 10% · Claude 10%10%3.7%10%10%
birdeye.comChatGPT 13% · Claude 0%10%2.8%13%0%
expertise.comChatGPT 11% · Claude 0%9.3%1.9%11%0%
trustindex.ioChatGPT 10% · Claude 0%8.3%4.6%10%0%
bbb.orgChatGPT 9.1% · Claude 0%7.4%4.6%9.1%0%
pagesjaunes.frChatGPT 8.0% · Claude 5.0%7.4%4.6%8.0%5.0%
bestprosintown.comChatGPT 9.1% · Claude 0%7.4%3.7%9.1%0%
which.co.ukChatGPT 8.0% · Claude 5.0%7.4%3.7%8.0%5.0%
local.chChatGPT 6.8% · Claude 5.0%6.5%4.6%6.8%5.0%
trustatrader.comChatGPT 6.8% · Claude 5.0%6.5%2.8%6.8%5.0%
trustlocal.deChatGPT 8.0% · Claude 0%6.5%1.9%8.0%0%

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The five sites ChatGPT and Claude read most before they recommend plumbers, October 2026
<a href="https://aigrow.gg/ai-sources/for/plumbers"><img src="https://aigrow.gg/og/ai-sources-for-plumbers.jpg" width="1200" height="630" alt="The five sites ChatGPT and Claude read most before they recommend plumbers, October 2026" style="max-width:100%;height:auto"></a>
<p><a href="https://aigrow.gg/ai-sources/for/plumbers">Source: AIGROW AI Source Map, October 2026</a></p>

By country

The five sites read most in each country with at least 5 answers. 9 with fewer are in the data file only.

Australia · 5 answers

Australia
SiteReadCitedChatGPTClaude
starworks.com.auChatGPT 100% · Claude 0%80%60%100%0%
wordofmouth.com.auChatGPT 100% · Claude 0%80%40%100%0%
productreview.com.auChatGPT 75% · Claude 100%80%20%75%100%
reddit.comChatGPT 100% · Claude 0%80%20%100%0%
hipages.com.auChatGPT 50% · Claude 0%40%0%50%0%

Belgium · 5 answers

Belgium
SiteReadCitedChatGPTClaude
trustup.beChatGPT 75% · Claude 100%80%20%75%100%
reddit.comChatGPT 100% · Claude 0%80%0%100%0%
svo-techniek.beChatGPT 75% · Claude 0%60%0%75%0%
vakmanindebuurt.beChatGPT 50% · Claude 0%40%40%50%0%
trustlocal.beChatGPT 50% · Claude 0%40%20%50%0%

Canada · 5 answers

Canada
SiteReadCitedChatGPTClaude
bestprosintown.comChatGPT 100% · Claude 0%80%60%100%0%
birdeye.comChatGPT 100% · Claude 0%80%40%100%0%
plumbing.caChatGPT 100% · Claude 0%80%20%100%0%
reddit.comChatGPT 100% · Claude 0%80%0%100%0%
homestars.comChatGPT 50% · Claude 100%60%20%50%100%

France · 8 answers

France
SiteReadCitedChatGPTClaude
pagesjaunes.frChatGPT 100% · Claude 100%100%63%100%100%
reddit.comChatGPT 100% · Claude 0%88%13%100%0%
batup-place.comChatGPT 71% · Claude 0%63%0%71%0%
travaux.comChatGPT 57% · Claude 0%50%13%57%0%
autour-de-moi.comChatGPT 57% · Claude 0%50%0%57%0%

Germany · 8 answers

Germany
SiteReadCitedChatGPTClaude
trustlocal.deChatGPT 100% · Claude 0%88%25%100%0%
reddit.comChatGPT 100% · Claude 0%88%0%100%0%
werkenntdenbesten.deChatGPT 71% · Claude 100%75%50%71%100%
dtgv.deChatGPT 86% · Claude 0%75%0%86%0%
profimap.deChatGPT 71% · Claude 0%63%38%71%0%

Italy · 8 answers

Italy
SiteReadCitedChatGPTClaude
prontopro.itChatGPT 100% · Claude 0%88%0%100%0%
reddit.comChatGPT 100% · Claude 0%88%0%100%0%
cronoshare.itChatGPT 71% · Claude 100%75%13%71%100%
idraulicisubito.comChatGPT 71% · Claude 0%63%0%71%0%
idraulicoplus.comChatGPT 57% · Claude 0%50%13%57%0%

Netherlands · 5 answers

Netherlands
SiteReadCitedChatGPTClaude
trustoo.nlChatGPT 100% · Claude 100%100%40%100%100%
werkspot.nlChatGPT 100% · Claude 0%80%40%100%0%
lecoskeuze.nlChatGPT 100% · Claude 0%80%20%100%0%
loodgieter-top.nlChatGPT 100% · Claude 0%80%0%100%0%
reddit.comChatGPT 100% · Claude 0%80%0%100%0%

Spain · 6 answers

Spain
SiteReadCitedChatGPTClaude
trustlocal.esChatGPT 100% · Claude 100%100%0%100%100%
fontanerosya.comChatGPT 100% · Claude 0%83%17%100%0%
reddit.comChatGPT 100% · Claude 0%83%0%100%0%
destaco.esChatGPT 80% · Claude 0%67%50%80%0%
buscarfontaneros.comChatGPT 80% · Claude 0%67%17%80%0%

Switzerland · 7 answers

Switzerland
SiteReadCitedChatGPTClaude
local.chChatGPT 100% · Claude 100%100%71%100%100%
reddit.comChatGPT 100% · Claude 0%86%0%100%0%
search.chChatGPT 67% · Claude 100%71%29%67%100%
localsearch.chChatGPT 67% · Claude 0%57%0%67%0%
daibau.chChatGPT 50% · Claude 0%43%0%50%0%

United Kingdom · 8 answers

United Kingdom
SiteReadCitedChatGPTClaude
checkatrade.comChatGPT 100% · Claude 100%100%50%100%100%
which.co.ukChatGPT 100% · Claude 100%100%50%100%100%
trustatrader.comChatGPT 86% · Claude 100%88%38%86%100%
reddit.comChatGPT 100% · Claude 0%88%0%100%0%
wikipedia.orgChatGPT 100% · Claude 0%88%0%100%0%

United States · 11 answers

United States
SiteReadCitedChatGPTClaude
consumeraffairs.comChatGPT 100% · Claude 100%100%64%100%100%
expertise.comChatGPT 100% · Claude 0%91%18%100%0%
reddit.comChatGPT 100% · Claude 0%91%18%100%0%
birdeye.comChatGPT 70% · Claude 0%64%9.1%70%0%
bbb.orgChatGPT 60% · Claude 0%55%36%60%0%

Who the assistants recommend

The AI Visibility Index counts the businesses the assistants name, for each place.

See the rankings for plumbers

How this was measured

The Index method
The question
Each assistant was asked the questions a buyer asks, with web search on: about a local trade in a city, or about software or a consumer brand in a country. Every page its searches returned and every page it gave as a source was kept.
Counting
A site counts once per answer, however many of its pages the answer read. Read is the share of answers that read at least one page of the site; cited is the share that gave one of its pages as the source of a recommendation.
Sources
A site counts as a source only when it appears on 3 or more pages of the Index. Below that it is almost always a business’s own website or a one-off article.
Edition
October 2026. 108 answers: ChatGPT 88, Claude 20.
Coverage
Not every assistant has answered on every page yet this month, so read each assistant’s shares next to its own number of answers.

Citing this data

AIGROW, AI Source Map, Plumbers, October 2026, aigrow.gg/ai-sources/for/plumbers. The figures and the data are published under CC BY 4.0: reuse them with a link to this page.

Download the data as JSON

Check your business on the sites the assistants read

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The free scan asks ChatGPT, Claude, Gemini and Grok the questions your customers ask and shows who they name. Check whether your business is on the sites they read before they answer.

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Edition October 2026 · data under CC BY 4.0