Bootstrap vs Headless UI

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

Top sites by authority

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

United States 758,929

10,311

India 368,409

5,941

Germany 277,428

4,777

United Kingdom 255,833

5,125

Brazil 241,343

3,562

France 234,434

4,140

Italy 222,549

3,212

Spain 183,194

3,332

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 Bootstrap sites · All Headless UI sites