MainAd vs Microsoft Advertising

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

Top sites by authority

MainAd · Microsoft Advertising · 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

MainAd · Microsoft Advertising · share of sites in each country using one or the other

United States 253

182,166

Italy 195

110,918

Germany 210

98,394

United Kingdom 268

87,408

France 199

76,184

Netherlands 187

64,020

Spain 210

58,499

Canada 149

57,630

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, Oct 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 MainAd sites · All Microsoft Advertising sites