W3.CSS vs ZURB Foundation
Head-to-head usage across the sites we track.
Top sites by authority
W3.CSS · ZURB Foundation · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
17
66
Open Page Rank 8+
131
1,019
Open Page Rank 7+
279
3,398
Open Page Rank 6+
399
6,143
Open Page Rank 5+
554
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
W3.CSS · ZURB Foundation · share of sites in each country using one or the other
United States
2,305
97,282
United Kingdom
1,006
33,264
Germany
991
27,418
India
2,546
24,995
Canada
799
26,635
France
976
23,439
Netherlands
698
18,526
Italy
803
17,777
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | W3.CSS | ZURB Foundation |
|---|---|---|
| LCP | 1.7 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 700 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
ZURB Foundation to W3.CSS
| Domain | When |
|---|---|
| iaseio.gr | Dec 2025 |