CoreUI vs ZURB Foundation
Head-to-head usage across the sites we track.
Top sites by authority
CoreUI · 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+
5
1,019
Open Page Rank 7+
15
3,398
Open Page Rank 6+
35
6,143
Open Page Rank 5+
54
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
CoreUI · ZURB Foundation · share of sites in each country using one or the other
United States
183
97,282
United Kingdom
74
33,264
Germany
93
27,418
Canada
72
26,635
India
148
24,995
France
82
23,439
Netherlands
62
18,526
Italy
69
17,777
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | CoreUI | ZURB Foundation |
|---|---|---|
| LCP | 1.8 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 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.