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+
16
65
Open Page Rank 8+
122
980
Open Page Rank 7+
267
3,281
Open Page Rank 6+
380
5,942
Open Page Rank 5+
517
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
W3.CSS · ZURB Foundation · share of sites in each country using one or the other
United States
2,024
86,282
United Kingdom
868
29,226
Germany
860
23,949
Canada
690
23,311
India
2,142
21,706
France
800
19,589
Netherlands
599
16,523
Italy
709
15,964
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, 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.
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 |