emailsecurity.app vs Fastmail

Fastmail is used by more websites in our catalog: 407 use emailsecurity.app and 1,580 use Fastmail.

Fastmail sites have the higher median Ahrefs Domain Rating (emailsecurity.app: 36, Fastmail: 38).

Between 2026-06 and 2026-07, emailsecurity.app went from 0.05% to 0.05% of all tracked sites, while Fastmail went from 0.22% to 0.18%. emailsecurity.app is gaining ground faster in our index.

No. A site runs a single email host, so emailsecurity.app and Fastmail 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.