Facebook Pixel vs Fathom

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

Top sites by authority

Facebook Pixel · Fathom · 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

Facebook Pixel · Fathom · share of sites in each country using one or the other

United States 682,486

5,663

India 232,577

2,033

Brazil 232,798

1,025

United Kingdom 215,651

3,552

Canada 179,139

1,736

Germany 152,732

2,117

Australia 147,442

1,183

France 143,703

1,621

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 Facebook Pixel sites · All Fathom sites