Analysis of 107 Million AI Answers: Where AI Search Engines Pull Citations

ArticleGintare RimolaityteResearch

An analysis of 107 million AI answers across ChatGPT, Perplexity, Gemini, and Google AI Overviews reveals the primary citation sources per industry. While user-generated content like Reddit and YouTube accounts for roughly half of all citations across the board, the remaining half differs sharply between B2B, consumer goods, and communications.

Key points

  1. Community and UGC platforms (Reddit, YouTube, forums) represent around 50% of top citations in all evaluated industries.
  2. In B2B software and IT services, independent editorial and reference platforms (G2, Clutch, Gartner) make up 47% of citations, while brand-owned sites account for only 2%.
  3. In consumer goods and e-commerce, brand and marketplace surfaces (such as Amazon) account for 46% of citations, with independent editorial dropping to 4%.
  4. In communications and media, independent editorial sources and Wikipedia make up 40%, whereas brand-owned pages account for just 10%.
  5. Engines diverge: Google AI Overviews relies heavily on YouTube and Reddit, ChatGPT leans towards editorial sources and Wikipedia, Perplexity balances community with review sites, and Gemini shifts based on product type.

Why it matters

Brands attempting to optimize for AI search visibility cannot rely on their own domains alone. Depending on the vertical, AI recommendations depend on third-party B2B directories, e-commerce product pages, or community discussions.

Analysis

The Trendos dataset indicates that generative engine optimization requires distinct industry playbooks. B2B firms gain little traction from self-published corporate content and must instead focus on earned directory reviews and trade press. Conversely, physical goods manufacturers must optimize marketplace listings and product review schemas. Because Reddit and YouTube constitute half of all citations regardless of sector, organic community presence is a core requirement across digital marketing.

Mentioned links

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Summary generated by AI (Gemini 3.8 Flash, 27 September 2026). It may contain errors – the original source is authoritative.

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