Who the engines named
CDK Global was named in 90 of 150 observed answers across ChatGPT, Claude, Perplexity, Google AI Overviews and Google AI Mode, more often than any of the other 21 vendors the Index checked in this category. CDK Global on the Index.
2 of the 22 checked vendors were named in none of the 150 observed answers:
1 of the 10 buyer questions returned no checked vendor in any observed answer. This counts checked vendors only; an engine may still have named a vendor outside the checked set.
Also named often: DealerCenter and Tekion. Every checked vendor's count and base is on the Index category page.
Answers were observed on 22 September 2026 (UTC) and released on 23 September 2026. These are observed answers on stated dates, not a ranking.