IIS vs Tengine

IIS is used by more websites in our catalog: 14,679 use IIS and 374 use Tengine.

Tengine sites have the higher median Ahrefs Domain Rating (IIS: 35, Tengine: 63).

Between 2026-06 and 2026-07, IIS went from 1.8% to 1.7% of all tracked sites, while Tengine went from 0.06% to 0.04%. Tengine is gaining ground faster in our index.

0 websites in our catalog use both IIS and Tengine.

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.