Bootstrap vs UnoCSS

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

Top sites by authority

Bootstrap · UnoCSS · 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

Bootstrap · UnoCSS · share of sites in each country using one or the other

United States 783,149

1,685

India 375,468

1,205

Germany 285,193

992

United Kingdom 258,945

822

Brazil 247,896

1,186

France 233,698

783

Italy 215,264

605

Canada 174,973

673

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 Bootstrap sites · All UnoCSS sites