co.uk vs Proton Mail

co.uk is used by more websites in our catalog: 2,691 use co.uk and 1,505 use Proton Mail.

Proton Mail sites have the higher median Ahrefs Domain Rating (co.uk: 26, Proton Mail: 30).

Between 2026-06 and 2026-07, co.uk went from 0.37% to 0.31% of all tracked sites, while Proton Mail went from 0.21% to 0.17%. Proton Mail is gaining ground faster in our index.

No. A site runs a single email host, so co.uk and Proton Mail 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.