IIS vs OpenResty

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

Top sites by authority

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

United States 117,730

42,667

India 58,829

22,436

United Kingdom 42,820

13,580

Italy 40,808

10,042

Brazil 34,656

12,938

Germany 31,200

15,296

Canada 31,601

11,812

South Korea 14,894

25,476

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 OpenResty sites