jellyfish.systems vs opalstack.com

jellyfish.systems is used by more websites in our catalog: 2,052 use jellyfish.systems and 112 use opalstack.com.

opalstack.com sites have the higher median Ahrefs Domain Rating (jellyfish.systems: 6, opalstack.com: 27).

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

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