IIS vs Nginx

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

Top sites by authority

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

United States 121,069

610,792

Japan 17,552

463,655

Germany 31,791

291,350

Russia 9,460

295,364

India 60,068

229,363

United Kingdom 43,214

211,733

Italy 39,691

188,318

Spain 26,642

179,475

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 Nginx sites