opalstack.com vs stackmail.com

stackmail.com is used by more websites in our catalog: 112 use opalstack.com and 2,434 use stackmail.com.

opalstack.com sites have the higher median Ahrefs Domain Rating (opalstack.com: 27, stackmail.com: 17).

Between 2026-06 and 2026-07, opalstack.com went from 0.02% to 0.01% of all tracked sites, while stackmail.com went from 0.35% to 0.28%. opalstack.com is gaining ground faster in our index.

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