jellyfish.systems vs mailinblack.com

jellyfish.systems is used by more websites in our catalog: 2,052 use jellyfish.systems and 107 use mailinblack.com.

mailinblack.com sites have the higher median Ahrefs Domain Rating (jellyfish.systems: 6, mailinblack.com: 58).

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

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