Google Ads Conversion Tracking vs Site Kit

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

Top sites by authority

Google Ads Conversion Tracking · 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

Google Ads Conversion Tracking · Site Kit · share of sites in each country using one or the other

United States 27,101

194,442

India 13,433

96,669

Japan 26,852

73,684

Brazil 14,087

73,670

United Kingdom 11,826

63,934

France 8,359

62,421

Spain 7,764

58,678

Italy 7,472

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 Google Ads Conversion Tracking sites · All Site Kit sites