Most Cited Sources in ChatGPT Answers in Spain
Jose Luis García del RíoGrowthatOmnia
To understand which sources ChatGPT cites when people ask it from Spain, we ran the same non-branded prompts every day from January to October 2026, in sectors ranging from finance to fashion, and recorded every source in each answer. These are the results.
1.17Manswers that cite sources
26,048non-branded prompts
30sectors
How we measured it
- We ran the same prompts in ChatGPT every day. 26,048 prompts that don't mention any brand, run from Spain from January to October 2026, like "what's the best car insurance?". None of them is like "is Mapfre's car insurance any good?".
- We recorded the sources in each answer. A source is any website ChatGPT cites. We only count answers that cite sources: 1.17 million, with 314,462 different sources. Answers that don't cite sources are not part of the analysis.
- We measured each source's presence: the percentage of answers that cite sources in which it appears.
- Every sector weighs the same. Each of the 30 sectors weighs the same in the ranking, however many prompts it has.
Free to use with attribution.
Please link to this page when you quote the data.
Omnia (2026). Most Cited Sources in ChatGPT Answers in Spain. Data Hub. useomnia.com/data/chatgpt-sources-spain
The 20 sources ChatGPT cites most in Spain
"Presence 13.2%" means that elpais.com appears in 1 of every 8 answers that cite sources to non-branded prompts in Spain.
All percentages are calculated over answers that cite sources, not over all ChatGPT answers.
| # | Source | Presence | Sectors | |
|---|---|---|---|---|
| 01 | elpais.comNews | 13.2% | 30 of 30 | |
| 02 | reddit.comSocial & forums | 10.5% | 30 of 30 | |
| 03 | wikipedia.orgReference | 6.3% | 30 of 30 | |
| 04 | ocu.orgComparison sites | 5.8% | 28 of 30 | |
| 05 | cadenaser.comNews | 4.8% | 30 of 30 | |
| 06 | nih.govReference | 4.1% | 26 of 30 | |
| 07 | as.comNews | 3.2% | 30 of 30 | |
| 08 | selectra.esComparison sites | 2.6% | 16 of 30 | |
| 09 | boe.esGovernment | 2.6% | 30 of 30 | |
| 10 | huffingtonpost.esNews | 2.3% | 30 of 30 | |
| 11 | rankia.comNews | 2.0% | 21 of 30 | |
| 12 | europapress.esNews | 2.0% | 28 of 30 | |
| 13 | lavanguardia.comNews | 1.8% | 30 of 30 | |
| 14 | sciencedirect.comReference | 1.7% | 29 of 30 | |
| 15 | idealista.comRetail | 1.7% | 22 of 30 | |
| 16 | roams.esComparison sites | 1.7% | 17 of 30 | |
| 17 | google.comOther | 1.7% | 30 of 30 | |
| 18 | kelisto.esComparison sites | 1.6% | 15 of 30 | |
| 19 | youtube.comSocial & forums | 1.6% | 30 of 30 | |
| 20 | bbva.esCompany websites | 1.5% | 18 of 30 |
Company websites have a presence of 71.0%, but none goes above 1.5%.
- Company websites71.0%
- News52.7%
- Comparison sites36.0%
- Retail30.4%
- Reference27.2%
- Government25.0%
- Social & forums14.9%
- Unclassified10.9%
- Company directories and jobs5.8%
- App stores1.0%
- Developer sites0.7%
News follows
The four outlets with the most presence are Spanish: elpais.com, cadenaser.com, as.com and huffingtonpost.es.
Who leads each type of source
Same presence metric, ranked within each source type.
- 01elpais.comGeneral news13.2%30/30
- 02cadenaser.comGeneral news4.8%30/30
- 03as.comGeneral news3.2%30/30
- 04huffingtonpost.esGeneral news2.3%30/30
- 05rankia.comMagazine & blog2.0%21/30
- 06europapress.esGeneral news2.0%28/30
- 07lavanguardia.comGeneral news1.8%30/30
- 08techradar.comMagazine & blog1.5%26/30
- 09elespanol.comGeneral news1.4%29/30
- 10infobae.comGeneral news1.2%28/30
News
elpais.com is the source with the most presence in the study: 13.2%, in all 30 sectors. cadenaser.com, the next outlet, has a presence of 4.8%.
- 01ocu.orgReview platform5.8%28/30
- 02selectra.esListicle & affiliate2.6%16/30
- 03roams.esListicle & affiliate1.7%17/30
- 04kelisto.esListicle & affiliate1.6%15/30
- 05rastreator.comListicle & affiliate1.2%17/30
- 06polizamedica.esListicle & affiliate1.0%9/30
- 07helpmycash.comListicle & affiliate1.0%14/30
- 08kompara.esListicle & affiliate0.9%11/30
- 09rankingsegurosespana.comListicle & affiliate0.8%9/30
- 10carwow.esListicle & affiliate0.7%13/30
Comparison sites
ocu.org, the consumer association's website, is cited in 28 of 30 sectors. None of the other nine comparison sites reaches 18 sectors.
- 01wikipedia.orgEncyclopedia & wiki6.3%30/30
- 02nih.govAcademic4.1%26/30
- 03sciencedirect.comAcademic1.7%29/30
- 04arxiv.orgAcademic1.5%30/30
- 05mayoclinic.orgDictionary & how-to1.3%18/30
- 06mdpi.comAcademic0.7%26/30
- 07elsevier.esAcademic0.6%19/30
- 08springer.comAcademic0.5%26/30
- 09doi.orgAcademic0.5%24/30
- 10researchgate.netAcademic0.5%28/30
Reference
wikipedia.org leads, with a presence of 6.3% in all 30 sectors. nih.gov follows with 4.1%: it is a US government website, but we count it here as an academic source.
- 01boe.esGovernment2.6%30/30
- 02europa.euGovernment1.4%28/30
- 03cnmc.esGovernment1.2%24/30
- 04bde.esGovernment1.0%17/30
- 05ordenacionjuego.esGovernment0.9%5/30
- 06who.intNGO & international0.9%23/30
- 07comunidad.madridGovernment0.8%30/30
- 08medlineplus.govGovernment0.7%17/30
- 09sanidad.gob.esGovernment0.7%22/30
- 10aemps.esGovernment0.6%10/30
Government
boe.es, Spain's official gazette, is cited in all 30 sectors. Regulators have their highest presence in their own sector: cnmc.es in energy (18.3%), bde.es in finance (14.5%) and ordenacionjuego.es in gaming (27.6%).
- 01reddit.comForum & community10.5%30/30
- 02youtube.comVideo1.6%30/30
- 03linkedin.comSocial network1.1%28/30
- 04finect.comForum & community0.6%13/30
- 05facebook.comSocial network0.2%28/30
- 06instagram.comSocial network0.2%28/30
- 07x.comSocial network0.2%24/30
- 08minube.comSocial network0.1%12/30
- 09forocoches.comForum & community0.1%25/30
- 10studylib.netForum & community0.1%21/30
Social & forums
reddit.com has a presence of 10.5%, and youtube.com, the next source of this type, 1.6%.
- 01idealista.comMarketplace1.7%22/30
- 02leroymerlin.esRetailer1.0%21/30
- 03elcorteingles.esRetailer0.7%28/30
- 04habitissimo.esMarketplace0.7%14/30
- 05decathlon.esRetailer0.6%18/30
- 06carrefour.esRetailer0.6%25/30
- 07zooplus.esRetailer0.6%4/30
- 08alibaba.comMarketplace0.5%26/30
- 09booking.comMarketplace0.5%18/30
- 10primor.euRetailer0.5%10/30
Retail
idealista.com leads, with a presence of 1.7% (25.5% in real estate). zooplus.es is cited in only 4 sectors, but makes the top 10 thanks to its presence in pets (17.1%), because every sector weighs the same.
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