Bootstrap vs USWDS
Head-to-head usage across the sites we track.
Top sites by authority
Bootstrap · USWDS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
181
22
Open Page Rank 8+
3,817
146
Open Page Rank 7+
18,570
235
Open Page Rank 6+
39,005
281
Open Page Rank 5+
72,373
325
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bootstrap · USWDS · share of sites in each country using one or the other
United States
758,929
605
India
368,409
270
Germany
277,428
152
United Kingdom
255,833
210
Brazil
241,343
162
France
234,434
135
Italy
222,549
128
Spain
183,194
133
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bootstrap | USWDS |
|---|---|---|
| LCP | 1.8 s | 1.4 s |
| INP | 75 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 600 ms |
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.