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 327,264

15,186

Japan 267,213

2,652

India 124,044

6,309

United Kingdom 114,905

7,345

Canada 83,462

6,278

France 83,126

3,371

Germany 74,359

3,560

Brazil 72,218

2,449

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