33Across vs AppNexus

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

Top sites by authority

33Across · AppNexus · 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

33Across · AppNexus · share of sites in each country using one or the other

United States 21,202

63,153

Canada 11,832

28,277

United Kingdom 11,160

28,394

India 9,579

21,189

Germany 8,899

20,086

France 8,215

20,122

Australia 7,901

18,205

Spain 7,569

17,003

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 33Across sites · All AppNexus sites