Let's Encrypt vs PerfectSSL

Let's Encrypt is used by more websites in our catalog: 466,882 use Let's Encrypt and 141 use PerfectSSL.

PerfectSSL sites have the higher median Ahrefs Domain Rating (Let's Encrypt: 23, PerfectSSL: 32).

Between 2026-06 and 2026-07, Let's Encrypt went from 59% to 53% of all tracked sites, while PerfectSSL went from 0.02% to 0.02%. PerfectSSL is gaining ground faster in our index.

No. A site runs a single SSL certificate authority, so Let's Encrypt and PerfectSSL 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.