Apollo vs core-js

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

Top sites by authority

Apollo · core-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

Apollo · core-js · share of sites in each country using one or the other

United States 24,235

1,295,217

India 5,814

433,567

Brazil 3,777

406,300

United Kingdom 5,545

402,603

Germany 5,047

384,505

France 4,287

315,055

Italy 3,553

302,259

Canada 5,364

295,823

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 Apollo sites · All core-js sites