Headless UI vs W3.CSS

Headless UI is used by more websites in our catalog: 2,125 use Headless UI and 1,051 use W3.CSS.

Headless UI sites have the higher median Ahrefs Domain Rating (Headless UI: 42, W3.CSS: 23).

Between 2026-06 and 2026-07, Headless UI went from 0.30% to 0.24% of all tracked sites, while W3.CSS went from 0.13% to 0.12%. W3.CSS is gaining ground faster in our index.

1 websites in our catalog use both Headless UI and W3.CSS.

Adoption is counted from Site Stats Database's own crawl; Domain Rating comes from Ahrefs and traffic from DataForSEO. Figures reflect the sites we track and refresh at least monthly.