mailsecurity.io vs Proton Mail

Proton Mail is used by more websites in our catalog: 131 use mailsecurity.io and 1,505 use Proton Mail.

Proton Mail sites have the higher median Ahrefs Domain Rating (mailsecurity.io: 13, Proton Mail: 30).

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

No. A site runs a single email host, so mailsecurity.io 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.