IIS vs Tengine

Head-to-head usage across the sites we track.

Top sites by authority

IIS · Tengine · how many of each technology's sites sit in the web's highest authority tiers

Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.

By country

IIS · Tengine · share of sites in each country using one or the other

United States 114,450

3,619

India 56,424

1,661

United Kingdom 41,553

1,260

Italy 38,779

947

Brazil 33,870

2,003

Canada 30,741

1,129

Germany 30,381

1,322

Türkiye 30,712

754

Audience countries from the Chrome UX Report, top markets of either technology.

Real user performance

Median site's p75 values from the Chrome UX Report, Oct 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.

Sites that switched

Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.

All IIS sites · All Tengine sites