Google Hosted Libraries vs Microsoft Ajax Content Delivery Network

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

Top sites by authority

Google Hosted Libraries · Microsoft Ajax Content Delivery Network · 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

Google Hosted Libraries · Microsoft Ajax Content Delivery Network · share of sites in each country using one or the other

United States 287,105

13,343

Japan 228,419

2,264

India 107,539

5,539

United Kingdom 98,380

6,286

Canada 72,013

5,559

France 68,288

2,742

Germany 64,646

3,045

Brazil 64,908

2,206

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 Google Hosted Libraries sites · All Microsoft Ajax Content Delivery Network sites