27.8% of the sources in Google's AI Overviews are user-generated platforms such as YouTube, Facebook and Reddit, against 0.2% of ChatGPT's sources. Across five AI engines, about one citation in eight is user-generated, and most of it is video and social media, not forums.
Source: Suff Digital analysis of 164,629 cited URLs · answers from ChatGPT, Gemini, Perplexity and Google's AI features, September 2026
Source: Suff Digital analysis of 164,629 cited URLs · answers from ChatGPT, Gemini, Perplexity and Google's AI features, September 2026
Source: Google AI Overviews Cite User-Generated Content 27.8% of the Time vs 0.2% for ChatGPT - Suff Digital