bb-theme-child vs twentyfifteen

bb-theme-child is used by more websites in our catalog: 544 use bb-theme-child and 193 use twentyfifteen.

bb-theme-child sites have the higher median Ahrefs Domain Rating (bb-theme-child: 28, twentyfifteen: 19).

Between 2026-06 and 2026-07, bb-theme-child went from 0.06% to 0.06% of all tracked sites, while twentyfifteen went from 0.02% to 0.02%. bb-theme-child is gaining ground faster in our index.

No. A site runs a single WordPress theme, so bb-theme-child and twentyfifteen 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.