Proofpoint vs stackmail.com

Proofpoint is used by more websites in our catalog: 10,601 use Proofpoint and 2,434 use stackmail.com.

Proofpoint sites have the higher median Ahrefs Domain Rating (Proofpoint: 60, stackmail.com: 17).

Between 2026-06 and 2026-07, Proofpoint went from 1.6% to 1.2% of all tracked sites, while stackmail.com went from 0.35% to 0.28%. stackmail.com is gaining ground faster in our index.

No. A site runs a single email host, so Proofpoint 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.