Sailthru vs Substack

Substack is used by more websites in our catalog: 205 use Sailthru and 1,089 use Substack.

Sailthru sites have the higher median Ahrefs Domain Rating (Sailthru: 67, Substack: 33).

Between 2026-06 and 2026-07, Sailthru went from 0.03% to 0.02% of all tracked sites, while Substack went from 0.16% to 0.12%. Sailthru is gaining ground faster in our index.

No. A site runs a single email / newsletter platform, so Sailthru and Substack 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.