Which Websites ChatGPT and Perplexity Cite, by Industry

Citable · 9 November 2026 · 7 min read

There is no single list of websites that ChatGPT and Perplexity cite. A Peec AI analysis of 30 million sources found Reddit was the most-cited domain across several engines, but the two engines favour different sites and the leaders change by sector. To know which websites matter for your business, check the prompts your buyers actually use, on each engine, over time.

Reddit led the Peec AI analysis, but ChatGPT and Perplexity favour different sites.
Only about 11% of domains are cited by both engines, so work for one does not carry over to the other.
Industry changes the picture: in Goodie's industry cuts, the leading domains differ sharply by sector, and NerdWallet leads retail banking.
Run real buyer prompts on each engine every few weeks and note which domains appear.

Is there one list of sites AI cites?

No. The most-cited domains depend on the engine, the sample and the sector. A global top ten is a starting point, not a plan.

Illustration about “Is there one list of sites AI cites?”

The clearest common result is Reddit. In the Peec AI analysis, published on 31 March 2026, Reddit was the most-cited source across ChatGPT, Google AI Mode, Gemini, Perplexity and AI Overviews. Peec AI's own write-up counts only sources directly cited in answers. It lists Reddit, YouTube, LinkedIn, Wikipedia and Forbes at the head of its top ten.

Beyond that, the lists diverge. An analysis of 680 million citations found that only about 11% of domains are cited by both ChatGPT and Perplexity.

Which websites does ChatGPT cite?

According to the Peec AI study, ChatGPT's citations skew toward Wikipedia, Reddit and editorial sites such as Forbes.

The order is not stable. Reddit overtook Wikipedia as ChatGPT's most-cited domain by July 2026, at 16.7% against 8.9%, according to a roundup of seven studies. The same roundup notes that an earlier Similarweb analysis from January and February 2026 had put Wikipedia first.

Surfer's September 2026 ranking, built from its users' prompts, puts Reddit first on 8.82% of top-50 citations, followed by Clutch, G2, Semrush and Ahrefs. Surfer's authors note that the prompts come from its users, so marketing and SaaS domains are over-represented. Read it as a marketing and SaaS picture, not an industry-wide one.

Which websites does Perplexity cite?

Perplexity leans on community and professional sites. In the Peec AI study, it emphasised Reddit, LinkedIn and G2 for B2B queries.

In Surfer's Perplexity data for September 2026, Reddit took about 19% of top-50 citations and LinkedIn about 6.6%. Clutch, HubSpot's blog, Forbes and Zapier followed.

Other studies rank it differently. Ahrefs' Perplexity ranking for September 2026 gives Reddit 21.6% mention share and puts YouTube second at 20.8%. Surfer ranks YouTube ninth, at 2.21% of top-50 citations.

For commercial-intent queries, Profound's analysis reports review and comparison sites as Perplexity's most-cited domains: G2, Gartner, NerdWallet, PCMag, TripAdvisor and Yelp. That conflicts with the Reddit-first picture, so the answer depends on the type of query.

Why do the lists disagree?

Each list uses its own metric. Ahrefs reports mention share, while Surfer reports share of top-50 citations. The two numbers cannot be compared directly.

Samples differ too. Surfer's prompts come from its own users. Goodie's study covers 58.6 million citations from October 2025 to March 2026 and finds Wikipedia leading overall at 3.4% citation share, with YouTube and Reddit next.

The YouTube gap is the clearest example. Ahrefs and Surfer both measure Perplexity, yet they place YouTube second and ninth. The metric and sample behind each list change the answer.

Study	Engine	Metric	Leading domains
Peec AI	ChatGPT and Perplexity	Direct citations	Wikipedia, Reddit, Forbes (ChatGPT); Reddit, LinkedIn, G2 (Perplexity)
Surfer	ChatGPT	Share of top-50 citations	Reddit (8.82%), Clutch, G2, Semrush, Ahrefs
Surfer	Perplexity	Share of top-50 citations	Reddit (about 19%), LinkedIn (about 6.6%), Clutch, HubSpot's blog
Ahrefs	Perplexity	Mention share	Reddit (21.6%), YouTube (20.8%)
Profound	Perplexity	Commercial-intent queries	G2, Gartner, NerdWallet, PCMag, TripAdvisor, Yelp

Before you act on any list, ask which engine, which metric and which prompts it reflects.

What changes by industry?

Industry matters more than the global list. Goodie's industry cuts show that leading domains differ sharply by sector: TechRadar holds 8.9% citation share in B2B SaaS CRM, while NerdWallet leads retail banking.

For software and B2B categories, review sites come up repeatedly. In a separate B2B SaaS analysis across models' top-10 lists, Reddit and G2 led, with PCMag, Gartner and TechRadar prominent in ChatGPT. A study of 36,140 buying-intent queries across ChatGPT, Perplexity, Claude and Gemini lists G2, Capterra, TrustRadius and Clutch as the most-cited sites for SaaS categories.

If you run an agency, a client's category may be missing from these lists altogether. For ecommerce and local businesses, the studies above do not break out categories in detail, so measure your own product and local prompts on both engines rather than assuming a general pattern.

Can a smaller brand get cited?

Perplexity's citations are spread widely. One vendor's analysis finds that 67.42% of citations fall outside the top 20 domains, so long-tail sites do get cited. That data comes from a single vendor, so treat it as a direction.

A realistic goal for a smaller brand is to appear on relevant sites in its category, not to chase the global top ten. Community and review sites sit near the top of most rankings above.

For more on how the engine picks sources, read how Perplexity chooses its sources.

Next steps

Write five to ten prompts your buyers would really use, in their own words.
Run them on ChatGPT and Perplexity, and note which domains are cited each time.
Repeat the same prompts every few weeks, because the rankings move.
Check whether your brand appears on the review and community sites that show up for your category.
If you want this measured weekly across ChatGPT, Gemini, Perplexity, Claude, Grok and Google AI, Citable does it and starts at $24/month with articles included; its guide on how to check if ChatGPT recommends your brand explains the manual method.

Frequently asked questions

Do ChatGPT and Perplexity cite the same websites?

Only partly. An analysis of 680 million citations found that about 11% of domains are cited by both. Reddit appears near the top for both, but ChatGPT leans toward Wikipedia and editorial sites, and Perplexity toward LinkedIn and G2 for B2B queries.

How often do the most-cited websites in ChatGPT change?

The order moves within months. Reddit overtook Wikipedia as ChatGPT's most-cited domain by July 2026, per a roundup of seven studies, after an earlier Similarweb analysis had put Wikipedia first.

Can a smaller website still get cited by Perplexity?

Yes. One vendor's analysis found that 67.42% of Perplexity's citations fall outside the top 20 domains. Long-tail sites are cited, though no study guarantees a citation for any given site.

Why does the same site rank differently in different studies?

Each study uses its own metric and sample. Ahrefs puts YouTube second on Perplexity at 20.8% mention share, while Surfer ranks it ninth at 2.21% of top-50 citations.

Sources

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