Microsoft 365 vs Rackspace Email

Microsoft 365 is used by more websites in our catalog: 159,483 use Microsoft 365 and 7,491 use Rackspace Email.

Microsoft 365 sites have the higher median Ahrefs Domain Rating (Microsoft 365: 34, Rackspace Email: 21).

Between 2026-06 and 2026-07, Microsoft 365 went from 21% to 18% of all tracked sites, while Rackspace Email went from 0.88% to 0.85%. Rackspace Email is gaining ground faster in our index.

No. A site runs a single email host, so Microsoft 365 and Rackspace Email 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.