Extra vs twentyfifteen

Extra is used by more websites in our catalog: 795 use Extra and 193 use twentyfifteen.

Extra sites have the higher median Ahrefs Domain Rating (Extra: 27, twentyfifteen: 19).

Between 2026-06 and 2026-07, Extra went from 0.11% to 0.09% of all tracked sites, while twentyfifteen went from 0.02% to 0.02%. twentyfifteen is gaining ground faster in our index.

No. A site runs a single WordPress theme, so Extra 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.