Apache HTTP Server vs IIS

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

Top sites by authority

Apache HTTP Server · IIS · 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

Apache HTTP Server · IIS · share of sites in each country using one or the other

United States 388,136

117,730

Germany 356,560

31,200

Japan 268,830

17,328

France 241,071

25,056

India 196,107

58,829

Brazil 167,215

34,656

United Kingdom 154,333

42,820

Spain 165,938

28,110

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, Sep 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 Apache HTTP Server sites · All IIS sites