AppNexus vs OpenX

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

Top sites by authority

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

United States 63,153

45,149

Canada 28,277

24,113

United Kingdom 28,394

23,140

India 21,189

16,209

Germany 20,086

15,217

France 20,122

13,999

Australia 18,205

15,781

Spain 17,003

12,337

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 AppNexus sites · All OpenX sites