Quantum Metric vs Site Kit

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

Top sites by authority

Quantum Metric · 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

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

United States 1,158

215,676

India 735

110,602

Japan 451

82,773

Brazil 492

80,295

France 575

74,632

United Kingdom 682

72,179

Spain 532

67,753

Italy 535

63,679

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, Jun 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 Quantum Metric sites · All Site Kit sites