In 14 of 20 product and service categories, ChatGPT, Gemini, Google AI Mode and Perplexity each put at least two of the same three brands in their own top three. In four categories, all four engines have exactly the same top three.
Source: Suff Digital analysis of AI answers to 2,000 "best product" and "best service" questions in 20 categories · answers from ChatGPT, Gemini, Perplexity and Google's AI features, September 2026
Source: AI Engines Agree on at Least Two of the Top Three Brands in 70% of Product Categories - Suff Digital