Radix UI vs USWDS
Head-to-head usage across the sites we track.
Top sites by authority
Radix UI · USWDS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
64
22
Open Page Rank 8+
813
146
Open Page Rank 7+
2,788
235
Open Page Rank 6+
5,011
281
Open Page Rank 5+
8,204
325
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Radix UI · USWDS · share of sites in each country using one or the other
United States
68,047
605
India
45,024
270
Brazil
35,199
162
United Kingdom
24,696
210
Germany
21,717
152
Canada
19,501
236
France
19,027
135
Indonesia
18,221
157
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Radix UI | USWDS |
|---|---|---|
| LCP | 2.4 s | 1.4 s |
| INP | 100 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.