Alexa Certified Site Metrics vs Site Kit

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

Top sites by authority

Alexa Certified Site Metrics · Site Kit · 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

Alexa Certified Site Metrics · Site Kit · share of sites in each country using one or the other

United States 2,045

194,442

India 1,302

96,669

Japan 640

73,684

Brazil 641

73,670

United Kingdom 1,165

63,934

France 959

62,421

Spain 793

58,678

Italy 781

55,218

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 Alexa Certified Site Metrics sites · All Site Kit sites