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 1,868,996

196,685

Japan 820,202

31,250

India 750,494

88,983

Germany 760,440

71,501

United Kingdom 627,325

74,584

France 602,656

65,402

Italy 522,636

65,347

Brazil 518,250

48,901

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 jQuery sites · All Underscore.js sites