AI Source Map · October 2026
Which sites ChatGPT reads before it makes a recommendation
The sites ChatGPT read in its answers with web search on, by country and kind of business, and where they differ from what Claude read.
89%of its answers read reddit.com
- Answers with web search on
- 2,580
- Searches per answer
- 3.9
- Sites read per answer
- 15.9
- Answers that cited a source
- 75%
In October 2026, ChatGPT answered 2,580 questions about businesses, software and brands with web search on. The sites it read most: reddit.com (89%), wikipedia.org (66%), trustpilot.com (12%). It read 15.9 different sites per answer and gave a site it read as the source of a recommendation in 75% of its answers.
The sites it reads most
Its 30 most read sources: the share of its own answers that read each and that cited it. Beside each, the share of Claude’s answers that read it.
| Site | Read | Cited | Claude |
|---|---|---|---|
| reddit.comClaude 0% | 89% | 3.5% | 0% |
| wikipedia.orgClaude 0.4% | 66% | 0% | 0.4% |
| trustpilot.comClaude 18% | 12% | 2.6% | 18% |
| elpais.comClaude 0% | 6.0% | 0.5% | 0% |
| birdeye.comClaude 0% | 5.0% | 1.6% | 0% |
| linkedin.comClaude 3.0% | 5.0% | 0.2% | 3.0% |
| wallpaper.comClaude 0.1% | 4.8% | 0.3% | 0.1% |
| michelin.comClaude 0.9% | 4.6% | 4.0% | 0.9% |
| pagesjaunes.frClaude 1.9% | 4.4% | 1.2% | 1.9% |
| trustindex.ioClaude 0.3% | 4.1% | 0.9% | 0.3% |
| cadenaser.comClaude 0% | 4.1% | 0% | 0% |
| clutch.coClaude 4.3% | 3.9% | 2.2% | 4.3% |
| provenexpert.comClaude 1.5% | 3.7% | 0.7% | 1.5% |
| youtube.comClaude 0% | 3.6% | 0% | 0% |
| werkenntdenbesten.deClaude 5.6% | 3.4% | 1.6% | 5.6% |
| localsearch.chClaude 0% | 3.0% | 0% | 0% |
| chambers.comClaude 0.3% | 2.9% | 1.6% | 0.3% |
| bestinhood.comClaude 0.1% | 2.8% | 1.2% | 0.1% |
| wanderlog.comClaude 0.6% | 2.8% | 0.3% | 0.6% |
| expertise.comClaude 0.7% | 2.7% | 0.3% | 0.7% |
| reviewhero.ioClaude 3.8% | 2.7% | 0.3% | 3.8% |
| trustanalytica.orgClaude 0.9% | 2.7% | 0.1% | 0.9% |
| local.chClaude 0.6% | 2.6% | 0.6% | 0.6% |
| livingetc.comClaude 0% | 2.6% | 0.2% | 0% |
| fresha.comClaude 2.7% | 2.4% | 0.7% | 2.7% |
| top-rated.onlineClaude 0% | 2.4% | 0.3% | 0% |
| techradar.comClaude 0.4% | 2.4% | 0% | 0.4% |
| squarespace.comClaude 0% | 2.3% | 0.3% | 0% |
| trustlocal.deClaude 0.7% | 2.3% | 0.3% | 0.7% |
| homesandgardens.comClaude 0% | 2.2% | 0.2% | 0% |
By country
Countries with at least 5 of its answers, and the sites it read most in each.
- Australia
- 119 answers. Read most: reddit.com 94%, wikipedia.org 75%, starworks.com.au 39%, wordofmouth.com.au 37%, productreview.com.au 27%
- Austria
- 94 answers. Read most: reddit.com 84%, wikipedia.org 84%, herold.at 43%, wko.at 30%, localitybiz.at 18%
- Belgium
- 119 answers. Read most: reddit.com 90%, wikipedia.org 59%, trustlocal.be 21%, ugent.be 16%, trustup.be 15%
- Brazil
- 94 answers. Read most: reddit.com 84%, wikipedia.org 59%, avaliacoesbrasil.com 13%, ufmg.br 13%, www.gov.br 12%
- Canada
- 119 answers. Read most: reddit.com 93%, wikipedia.org 70%, threebestrated.ca 33%, trustanalytica.org 26%, birdeye.com 24%
- Denmark
- 69 answers. Read most: reddit.com 91%, trustpilot.com 49%, wikipedia.org 48%, cvrapi.dk 16%, aarhus.dk 13%
- France
- 194 answers. Read most: reddit.com 87%, wikipedia.org 80%, pagesjaunes.fr 58%, autour-de-moi.com 24%, lemonde.fr 20%
- Germany
- 194 answers. Read most: reddit.com 85%, wikipedia.org 81%, werkenntdenbesten.de 46%, reviewhero.io 36%, trustlocal.de 29%
- Ireland
- 69 answers. Read most: reddit.com 93%, wikipedia.org 70%, trustpilot.com 26%, locallyirish.ie 17%, bestinireland.com 14%
- Italy
- 194 answers. Read most: reddit.com 94%, wikipedia.org 69%, prontopro.it 28%, altraopinione.org 22%, trustpilot.com 19%
- Mexico
- 94 answers. Read most: reddit.com 88%, wikipedia.org 46%, elpais.com 26%, cdmx.gob.mx 15%, cdmxelige.com.mx 14%
- Netherlands
- 119 answers. Read most: reddit.com 92%, trustoo.nl 44%, lecoskeuze.nl 38%, wikipedia.org 35%, trustpilot.com 29%
- Norway
- 69 answers. Read most: reddit.com 88%, wikipedia.org 39%, mittanbud.no 16%, trustpilot.com 16%, sjekkscore.no 14%
- Poland
- 94 answers. Read most: reddit.com 87%, oferteo.pl 35%, wikipedia.org 31%, krakow.pl 23%, biznes-top.pl 15%
- Portugal
- 69 answers. Read most: reddit.com 93%, wikipedia.org 71%, zaask.pt 20%, marcarecomendada.pt 19%, melhoreslisboa.pt 14%
- Spain
- 144 answers. Read most: reddit.com 81%, elpais.com 60%, wikipedia.org 56%, cadenaser.com 51%, trustlocal.es 26%
- Sweden
- 94 answers. Read most: reddit.com 89%, reco.se 36%, kundernas.se 35%, wikipedia.org 30%, cision.com 26%
- Switzerland
- 169 answers. Read most: reddit.com 83%, wikipedia.org 81%, localsearch.ch 46%, local.ch 39%, ranq.ch 23%
- United Kingdom
- 194 answers. Read most: reddit.com 93%, wikipedia.org 84%, trustpilot.com 29%, yell.com 25%, threebestrated.co.uk 24%
- United States
- 269 answers. Read most: reddit.com 95%, wikipedia.org 73%, birdeye.com 28%, expertise.com 25%, bestinhood.com 16%
By kind of business
Kinds of business with at least 5 of its answers, across every country, and the sites it read most for each.
- Accountants
- 88 answers. Read most: reddit.com 97%, wikipedia.org 64%, clutch.co 15%, linkedin.com 15%, clearlyrated.com 14%
- Accounting software
- 20 answers. Read most: reddit.com 55%, wikipedia.org 45%, techradar.com 30%, youtube.com 30%, xero.com 25%
- Appointment booking software
- 20 answers. Read most: simplybook.me 75%, reddit.com 70%, calendly.com 60%, wikipedia.org 45%, fresha.com 35%
- Architects
- 88 answers. Read most: wikipedia.org 99%, reddit.com 65%, wallpaper.com 50%, homesandgardens.com 17%, cadenaser.com 10%
- Banks
- 20 answers. Read most: reddit.com 70%, wikipedia.org 45%, youtube.com 20%, kiplinger.com 15%, nasdaq.com 10%
- Car brands
- 20 answers. Read most: wikipedia.org 60%, reddit.com 55%, youtube.com 55%, cadenaser.com 40%, as.com 35%
- Car insurance companies
- 20 answers. Read most: reddit.com 100%, wikipedia.org 55%, kiplinger.com 25%, consumentenbond.nl 10%, epsi-norway.org 10%
- Car repair shops
- 88 answers. Read most: reddit.com 99%, wikipedia.org 65%, boschcarservice.com 21%, trustpilot.com 21%, birdeye.com 16%
- Cleaning services
- 88 answers. Read most: reddit.com 100%, wikipedia.org 49%, trustpilot.com 46%, trustanalytica.org 11%, expertise.com 9.1%
- CRM software
- 20 answers. Read most: pipedrive.com 90%, zoho.com 80%, hubspot.com 65%, hubspot.de 15%, teamleader.eu 15%
- Dentists
- 88 answers. Read most: reddit.com 99%, wikipedia.org 52%, trustpilot.com 22%, birdeye.com 16%, top-rated.online 14%
- Dermatologists
- 88 answers. Read most: reddit.com 93%, wikipedia.org 80%, jameda.de 6.8%, miodottore.it 6.8%, sfdermato.org 6.8%
- Digital marketing agencies
- 88 answers. Read most: reddit.com 99%, wikipedia.org 89%, clutch.co 51%, designrush.com 19%, goodfirms.co 14%
- Driving schools
- 88 answers. Read most: reddit.com 98%, wikipedia.org 41%, trustpilot.com 18%, drivingschools.directory 16%, trustanalytica.org 14%
- E-commerce platforms
- 20 answers. Read most: shopify.com 100%, woocommerce.com 75%, reddit.com 70%, wikipedia.org 60%, squareup.com 20%
- Electricians
- 88 answers. Read most: reddit.com 98%, wikipedia.org 35%, trustpilot.com 22%, birdeye.com 13%, consumeraffairs.com 11%
- Electronics retailers
- 20 answers. Read most: reddit.com 90%, wikipedia.org 70%, trustpilot.com 15%, techradar.com 15%, whathifi.com 10%
- Email marketing software
- 20 answers. Read most: brevo.com 100%, mailerlite.com 90%, mailchimp.com 75%, reddit.com 25%, techradar.com 25%
- Energy suppliers
- 20 answers. Read most: reddit.com 85%, wikipedia.org 70%, youtube.com 25%, arxiv.org 20%, elpais.com 15%
- Financial advisors
- 88 answers. Read most: reddit.com 97%, wikipedia.org 81%, kiplinger.com 25%, trustpilot.com 10%, nafop.org 8.0%
- Gyms
- 88 answers. Read most: reddit.com 100%, wikipedia.org 76%, top-rated.online 25%, trustpilot.com 17%, wanderlog.com 16%
- Hair salons
- 88 answers. Read most: reddit.com 98%, wikipedia.org 53%, fresha.com 52%, marieclaire.co.uk 24%, marieclaire.com 23%
- Help desk software
- 20 answers. Read most: zoho.com 95%, freshworks.com 95%, zendesk.com 75%, reddit.com 35%, helpscout.com 30%
- Home internet providers
- 20 answers. Read most: reddit.com 90%, wikipedia.org 60%, nperf.com 40%, techradar.com 25%, youtube.com 20%
- Hotels
- 88 answers. Read most: reddit.com 97%, wikipedia.org 85%, michelin.com 43%, cntraveler.com 38%, tripadvisor.com 35%
- Insurance brokers
- 88 answers. Read most: reddit.com 93%, wikipedia.org 83%, trustpilot.com 22%, arxiv.org 11%, provenexpert.com 9.1%
- Interior designers
- 88 answers. Read most: wikipedia.org 98%, reddit.com 77%, wallpaper.com 52%, livingetc.com 51%, homesandgardens.com 48%
- Lawyers
- 88 answers. Read most: wikipedia.org 82%, reddit.com 78%, chambers.com 74%, elpais.com 35%, legal500.com 25%
- Mobile carriers
- 20 answers. Read most: reddit.com 95%, wikipedia.org 80%, tomsguide.com 70%, opensignal.com 60%, nperf.com 45%
- Moving companies
- 88 answers. Read most: reddit.com 100%, wikipedia.org 51%, trustpilot.com 34%, trustindex.io 25%, movebuddha.com 11%
- Online brokers
- 20 answers. Read most: reddit.com 40%, wikipedia.org 35%, interactivebrokers.com 25%, home.saxo 20%, traderepublic.com 20%
- Payroll software
- 20 answers. Read most: reddit.com 75%, wikipedia.org 55%, sage.com 25%, intuit.com 20%, techradar.com 20%
- Physiotherapists
- 88 answers. Read most: reddit.com 99%, wikipedia.org 68%, physiofinder.net 14%, birdeye.com 11%, wanderlog.com 11%
- Plumbers
- 88 answers. Read most: reddit.com 100%, wikipedia.org 27%, trustpilot.com 17%, birdeye.com 13%, consumeraffairs.com 11%
- Project management software
- 20 answers. Read most: asana.com 100%, trello.com 90%, clickup.com 80%, monday.com 80%, teamwork.com 25%
- Real estate agencies
- 88 answers. Read most: reddit.com 94%, wikipedia.org 65%, engelvoelkers.com 27%, trustpilot.com 26%, birdeye.com 10%
- Restaurant POS systems
- 20 answers. Read most: reddit.com 65%, wikipedia.org 45%, lightspeedhq.com 40%, squareup.com 25%, sumup.com 20%
- Restaurants
- 88 answers. Read most: wikipedia.org 99%, michelin.com 92%, reddit.com 91%, restaurantsforkings.com 31%, timeout.com 22%
- Roofers
- 88 answers. Read most: reddit.com 91%, wikipedia.org 44%, trustpilot.com 21%, birdeye.com 13%, provenexpert.com 11%
- Supermarkets
- 20 answers. Read most: reddit.com 80%, wikipedia.org 50%, youtube.com 50%, as.com 25%, elpais.com 25%
- Veterinarians
- 88 answers. Read most: reddit.com 96%, wikipedia.org 65%, infovet.vet 19%, aaha.org 14%, trustpilot.com 14%
- Web design agencies
- 88 answers. Read most: reddit.com 100%, wikipedia.org 89%, clutch.co 43%, designrush.com 15%, lafabriquedunet.fr 9.1%
- Website builders
- 20 answers. Read most: wix.com 90%, shopify.com 80%, squarespace.com 70%, reddit.com 55%, techradar.com 35%
- Wedding photographers
- 88 answers. Read most: reddit.com 98%, wikipedia.org 92%, fearlessphotographers.com 47%, wpja.com 18%, digitalcameraworld.com 18%
Where ChatGPT and Claude differ
Of the 20 sites ChatGPT reads most, 4 are also among the 20 that Claude reads most. The widest gap is on reddit.com: ChatGPT read it in 89% of its answers, Claude in 0% of its own. The lists below take the sites read in at least 5 answers in all, and compare the share of each assistant’s own answers that read them.
Read more by ChatGPT than by Claude
| Site | ChatGPT | Claude |
|---|---|---|
| reddit.com | 89% | 0% |
| wikipedia.org | 66% | 0.4% |
| elpais.com | 6.0% | 0% |
| birdeye.com | 5.0% | 0% |
| wallpaper.com | 4.8% | 0.1% |
| cadenaser.com | 4.1% | 0% |
| trustindex.io | 4.1% | 0.3% |
| michelin.com | 4.6% | 0.9% |
| youtube.com | 3.6% | 0% |
| localsearch.ch | 3.0% | 0% |
Read more by Claude than by ChatGPT
| Site | ChatGPT | Claude |
|---|---|---|
| revenuebase.ai | 0.2% | 8.3% |
| trustpilot.com | 12% | 18% |
| semrush.com | 0.3% | 3.8% |
| rankingpro.pl | 0.1% | 3.1% |
| indeed.com | 0.3% | 3.1% |
| finn.no | 0% | 2.4% |
| brokerchooser.com | 0% | 2.2% |
| portaldaqueixa.com | 0.2% | 2.4% |
| werkenntdenbesten.de | 3.4% | 5.6% |
| comerciosaopaulo.com.br | 0.1% | 2.2% |
Questions
- What sources does ChatGPT use for recommendations?
- In October 2026, with web search on, the sites ChatGPT read most before a recommendation were: reddit.com (89%), wikipedia.org (66%), trustpilot.com (12%). It gave a site it read as the source of a recommendation in 75% of its 2,580 answers.
- Does ChatGPT read the same sites as Claude?
- Of the 20 sites ChatGPT reads most, 4 are also among the 20 that Claude reads most. The widest gap is on reddit.com: ChatGPT read it in 89% of its answers, Claude in 0% of its own.
- How many sites does ChatGPT read before it makes a recommendation?
- In October 2026, ChatGPT ran 3.9 searches and read 15.9 different sites per answer on average.
How this was measured
- 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. 3,256 answers: ChatGPT 2,580, Claude 676.
- 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, ChatGPT, October 2026, aigrow.gg/ai-sources/assistant/chatgpt. The figures and the data are published under CC BY 4.0: reuse them with a link to this page.
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Edition October 2026 · data under CC BY 4.0