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 121,069

3,612

India 60,068

1,736

United Kingdom 43,214

1,257

Italy 39,691

931

Brazil 35,276

2,127

Germany 31,791

1,340

Canada 31,780

1,161

Türkiye 31,323

746

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, Aug 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