co.uk vs opalstack.com

co.uk is used by more websites in our catalog: 2,691 use co.uk and 112 use opalstack.com.

opalstack.com sites have the higher median Ahrefs Domain Rating (co.uk: 26, opalstack.com: 27).

Between 2026-06 and 2026-07, co.uk went from 0.37% to 0.31% of all tracked sites, while opalstack.com went from 0.02% to 0.01%. opalstack.com is gaining ground faster in our index.

No. A site runs a single email host, so co.uk and opalstack.com 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.