Data & research

What we measured about AI search.

Our own first-party research on where AI engines send their citations, published in full, caveats loud. Explore the data, read the statistics, or jump to your industry.

New: Reddit citation study
Reddit is the source AI cites most

We measured which sources ChatGPT and Google's AI cite for software buyers. Reddit was the #1 source on ChatGPT (30% of citations) and #2 on Google, ahead of every brand's own site.

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The Prefer Index
Who actually gets cited in AI search

A measured run of 47 buyer questions across ChatGPT, Perplexity, Gemini, and Claude with web search on. 1237 citations, sliced every way. Explore the interactive data.

Explore the Index
AI search statistics
The numbers on how AI answers cite sources

The headline stats from the study in one place: where citations go, how the engines differ, and how little they overlap. Quotable, sourced, and dated.

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Industry cheat sheets
Which sources get cited in your industry

The per-industry companion to the Index: for each industry, where the citations go, the publishers to get featured in, and the brands AI names most.

Open the cheat sheets

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