AI engine citations of top domains

Among more than a billion citations from Sept. 14 to Oct. 14, 2025

A bar chart shows the AI engine citation volume among top domains for ChatGPT, Google AI overviews, Perplexity and the top seven domains among all engines analyzed. YouTube accounts for 2.9% of citations in the full analysis and 5.9% of Google AI Overview's, Wikipedia is 5.9% of ChatGPT's, and Reddit is 6.3% of Perplexity's.

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