Klaviyo vs SendFox

Klaviyo is used by more websites in our catalog: 13,451 use Klaviyo and 106 use SendFox.

Klaviyo sites have the higher median Ahrefs Domain Rating (Klaviyo: 32, SendFox: 28).

Between 2026-06 and 2026-07, Klaviyo went from 2.0% to 1.5% of all tracked sites, while SendFox went from 0.02% to 0.01%. SendFox is gaining ground faster in our index.

No. A site runs a single email / newsletter platform, so Klaviyo and SendFox 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.