Adform vs AppNexus

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

Top sites by authority

Adform · 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

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

United States 3,447

53,163

United Kingdom 2,403

24,886

Canada 1,407

24,461

Germany 2,858

17,552

India 1,475

18,232

France 2,167

16,584

Spain 2,911

15,151

Australia 1,020

15,760

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, Sep 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 Adform sites · All AppNexus sites