USWDS vs ZURB Foundation
Head-to-head usage across the sites we track.
Top sites by authority
USWDS · ZURB Foundation · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
22
66
Open Page Rank 8+
144
1,000
Open Page Rank 7+
233
3,322
Open Page Rank 6+
280
6,029
Open Page Rank 5+
318
10,079
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
USWDS · ZURB Foundation · share of sites in each country using one or the other
United States
610
87,178
United Kingdom
197
29,173
Germany
152
24,259
Canada
228
23,316
India
269
22,314
France
131
19,373
Netherlands
119
16,190
Australia
155
15,569
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | USWDS | ZURB Foundation |
|---|---|---|
| LCP | 1.4 s | 1.8 s |
| INP | 50 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 600 ms | 900 ms |
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.