React vs Zone.js

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

Top sites by authority

React · Zone.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

React · Zone.js · share of sites in each country using one or the other

United States 595,277

55,973

India 243,719

28,921

United Kingdom 194,085

21,516

Germany 162,915

22,016

Brazil 164,323

18,357

Canada 148,255

17,523

France 143,971

18,386

Spain 106,955

16,468

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 React sites · All Zone.js sites