Closure Library vs Swiper

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

Top sites by authority

Closure Library · Swiper · 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

Closure Library · Swiper · share of sites in each country using one or the other

United States 7,960

436,711

India 5,352

243,576

Brazil 3,394

230,631

Germany 2,407

191,904

Japan 3,337

181,403

United Kingdom 2,866

161,912

France 2,590

156,599

Italy 2,378

140,074

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 Closure Library sites · All Swiper sites