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 14,035

55,306

United Kingdom 7,346

25,318

Canada 7,374

24,555

India 6,407

18,466

Germany 6,234

18,026

France 5,721

17,057

Australia 4,946

16,016

Spain 5,448

15,020

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 33Across sites · All AppNexus sites