jQuery vs Underscore.js

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

Top sites by authority

jQuery · Underscore.js · 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

jQuery · Underscore.js · share of sites in each country using one or the other

United States 1,602,536

171,809

Japan 694,689

26,777

Germany 657,374

62,310

India 637,845

75,536

United Kingdom 540,397

65,350

France 506,084

54,908

Italy 464,759

58,817

Brazil 453,310

42,848

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 jQuery sites · All Underscore.js sites