Foundation vs UIkit

Foundation is used by more websites in our catalog: 8,731 use Foundation and 5,433 use UIkit.

Foundation sites have the higher median Ahrefs Domain Rating (Foundation: 32, UIkit: 26).

Between 2026-06 and 2026-07, Foundation went from 1.1% to 0.99% of all tracked sites, while UIkit went from 0.56% to 0.62%. UIkit is gaining ground faster in our index.

123 websites in our catalog use both Foundation and UIkit.

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.