IONOS vs Proton Mail

IONOS is used by more websites in our catalog: 7,789 use IONOS and 1,505 use Proton Mail.

Proton Mail sites have the higher median Ahrefs Domain Rating (IONOS: 20, Proton Mail: 30).

Between 2026-06 and 2026-07, IONOS went from 0.97% to 0.88% 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 IONOS 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.