comScore vs Site Kit

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

Top sites by authority

comScore · 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

comScore · Site Kit · share of sites in each country using one or the other

United States 37,804

194,442

India 12,514

96,669

United Kingdom 17,543

63,934

Brazil 7,389

73,670

Japan 4,943

73,684

France 9,073

62,421

Spain 8,349

58,678

Italy 7,527

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 comScore sites · All Site Kit sites