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+
15
66
Open Page Rank 8+
125
1,000
Open Page Rank 7+
274
3,322
Open Page Rank 6+
391
6,029
Open Page Rank 5+
537
10,079
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
2,038
87,178
United Kingdom
878
29,173
Germany
889
24,259
India
2,209
22,314
Canada
700
23,316
France
814
19,373
Netherlands
591
16,190
Australia
510
15,569
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | W3.CSS | ZURB Foundation |
|---|---|---|
| LCP | 1.6 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, Aug 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 |
|---|---|
| upnm.edu.my | Jul 2026 |
| iaseio.gr | Dec 2025 |