Clarity vs ZURB Foundation
Head-to-head usage across the sites we track.
Top sites by authority
Clarity · ZURB Foundation · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
66
Open Page Rank 8+
10
1,019
Open Page Rank 7+
17
3,398
Open Page Rank 6+
24
6,143
Open Page Rank 5+
27
10,238
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Clarity · ZURB Foundation · share of sites in each country using one or the other
United States
73
97,282
United Kingdom
47
33,264
Germany
59
27,418
Canada
35
26,635
India
54
24,995
France
43
23,439
Netherlands
40
18,526
Italy
47
17,777
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Clarity | ZURB Foundation |
|---|---|---|
| LCP | 2.1 s | 1.8 s |
| INP | 100 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 500 ms | 800 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.