Kestrel vs Phusion Passenger

Kestrel is used by more websites in our catalog: 952 use Kestrel and 943 use Phusion Passenger.

Phusion Passenger sites have the higher median Ahrefs Domain Rating (Kestrel: 23, Phusion Passenger: 32).

Between 2026-06 and 2026-07, Kestrel went from 0.10% to 0.11% of all tracked sites, while Phusion Passenger went from 0.12% to 0.11%. Kestrel is gaining ground faster in our index.

2 websites in our catalog use both Kestrel and Phusion Passenger.

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.