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
65
Open Page Rank 8+
4
980
Open Page Rank 7+
17
3,281
Open Page Rank 6+
37
5,942
Open Page Rank 5+
58
9,943
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
168
86,282
United Kingdom
72
29,226
Germany
73
23,949
Canada
59
23,311
India
125
21,706
France
65
19,589
Netherlands
49
16,523
Italy
60
15,964
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 | 700 ms | 900 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.