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+
180
22
Open Page Rank 8+
3,860
147
Open Page Rank 7+
18,993
231
Open Page Rank 6+
40,203
277
Open Page Rank 5+
74,817
317
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
886,770
668
India
429,293
295
Germany
322,762
182
United Kingdom
295,976
217
France
279,130
171
Brazil
273,285
174
Italy
251,088
146
Spain
202,979
144
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, 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.