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 1,645,337

174,846

Germany 672,972

63,127

Japan 705,260

26,796

India 652,564

77,587

United Kingdom 543,018

65,581

France 501,574

54,266

Brazil 468,680

43,920

Italy 448,261

56,155

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 jQuery sites · All Underscore.js sites