jellyfish.systems vs mailsecurity.io

jellyfish.systems is used by more websites in our catalog: 2,052 use jellyfish.systems and 131 use mailsecurity.io.

mailsecurity.io sites have the higher median Ahrefs Domain Rating (jellyfish.systems: 6, mailsecurity.io: 13).

Between 2026-06 and 2026-07, jellyfish.systems went from 0.26% to 0.23% of all tracked sites, while mailsecurity.io went from 0.02% to 0.01%. mailsecurity.io is gaining ground faster in our index.

No. A site runs a single email host, so jellyfish.systems and mailsecurity.io 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.