IIS vs LiteSpeed

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

Top sites by authority

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

United States 117,730

81,175

India 58,829

108,379

Brazil 34,656

68,054

United Kingdom 42,820

50,531

Indonesia 15,637

71,564

Poland 13,316

72,768

Türkiye 31,246

49,519

Italy 40,808

32,849

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 IIS sites · All LiteSpeed sites