Polyfill vs Swiper

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

Top sites by authority

Polyfill · 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

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

United States 27,575

491,705

India 11,069

274,591

Brazil 9,305

234,477

Germany 9,145

213,155

Japan 8,150

207,032

United Kingdom 11,713

182,905

France 9,287

185,131

Italy 7,289

160,103

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 Polyfill sites · All Swiper sites