bb-theme-child vs understrap

bb-theme-child is used by more websites in our catalog: 544 use bb-theme-child and 103 use understrap.

understrap sites have the higher median Ahrefs Domain Rating (bb-theme-child: 28, understrap: 31).

Between 2026-06 and 2026-07, bb-theme-child went from 0.06% to 0.06% of all tracked sites, while understrap went from 0.01% to 0.01%. bb-theme-child is gaining ground faster in our index.

No. A site runs a single WordPress theme, so bb-theme-child and understrap are mutually exclusive.

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.