AppNexus vs Rubicon Project

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

Top sites by authority

AppNexus · Rubicon Project · 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

AppNexus · Rubicon Project · share of sites in each country using one or the other

United States 55,306

40,336

United Kingdom 25,318

21,806

Canada 24,555

22,134

India 18,466

14,870

Germany 18,026

14,552

Australia 16,016

14,932

France 17,057

12,787

Spain 15,020

11,532

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 AppNexus sites · All Rubicon Project sites