BootstrapCDN vs unpkg

BootstrapCDN is used by more websites in our catalog: 39,625 use BootstrapCDN and 22,581 use unpkg.

unpkg sites have the higher median Ahrefs Domain Rating (BootstrapCDN: 29, unpkg: 33).

Between 2026-06 and 2026-07, BootstrapCDN went from 4.9% to 4.5% of all tracked sites, while unpkg went from 2.9% to 2.6%. unpkg is gaining ground faster in our index.

3,372 websites in our catalog use both BootstrapCDN and unpkg.

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.