office365.us vs Proton Mail

Proton Mail is used by more websites in our catalog: 119 use office365.us and 1,505 use Proton Mail.

office365.us sites have the higher median Ahrefs Domain Rating (office365.us: 50, Proton Mail: 30).

Between 2026-06 and 2026-07, office365.us went from 0.02% to 0.01% of all tracked sites, while Proton Mail went from 0.21% to 0.17%. office365.us is gaining ground faster in our index.

No. A site runs a single email host, so office365.us 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.