mailsecurity.io vs Microsoft 365

Microsoft 365 is used by more websites in our catalog: 131 use mailsecurity.io and 159,483 use Microsoft 365.

Microsoft 365 sites have the higher median Ahrefs Domain Rating (mailsecurity.io: 13, Microsoft 365: 34).

Between 2026-06 and 2026-07, mailsecurity.io went from 0.02% to 0.01% of all tracked sites, while Microsoft 365 went from 21% to 18%. mailsecurity.io is gaining ground faster in our index.

No. A site runs a single email host, so mailsecurity.io and Microsoft 365 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.