opalstack.com vs Rackspace Email

Rackspace Email is used by more websites in our catalog: 112 use opalstack.com and 7,491 use Rackspace Email.

opalstack.com sites have the higher median Ahrefs Domain Rating (opalstack.com: 27, Rackspace Email: 21).

Between 2026-06 and 2026-07, opalstack.com went from 0.02% to 0.01% of all tracked sites, while Rackspace Email went from 0.88% to 0.85%. opalstack.com is gaining ground faster in our index.

No. A site runs a single email host, so opalstack.com 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.