Data reports
What we found by measuring real websites. Each report has its method and a CSV that is free to use with credit (CC BY 4.0).
Who lets AI read their site?
Sitepeel checked 193 top brand sites in November 2026: 58% publish an llms.txt and 11% block a named AI crawler in robots.txt. Bot-by-bot table, free CSV.
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What top brand websites are built with
Sitepeel measured 191 top brand sites on November 4, 2026: 76% run React, 46% Next.js, 40% Tailwind CSS. Hosting and analytics too, free CSV.
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The fonts and colors of 168 top websites
The fonts and colors of 168 top websites, measured in October 2026: Inter on 26%, custom type on 54%, 44% in dark mode. Charts, method and a free CSV.
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What AI slop looks like on real websites
We ran the AI slop checker on 126 startup home pages from YC’s 2026 batches. The score spread, the 10 most common tells and the method, with a free CSV.
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