Flat UI vs Tailwind CSS
Head-to-head usage across the sites we track.
Top sites by authority
Flat UI · Tailwind CSS · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
1
138
Open Page Rank 8+
15
2,335
Open Page Rank 7+
27
9,237
Open Page Rank 6+
37
17,618
Open Page Rank 5+
53
30,307
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Flat UI · Tailwind CSS · share of sites in each country using one or the other
United States
310
203,434
India
209
131,454
Brazil
115
113,648
Germany
145
86,831
United Kingdom
215
86,486
France
124
72,176
Canada
132
63,877
Indonesia
115
61,161
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Flat UI | Tailwind CSS |
|---|---|---|
| LCP | 2.1 s | 2.1 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 700 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.
Flat UI to Tailwind CSS
| Domain | When |
|---|---|
| jewelrycaddream.com | Aug 2026 |
| tehma.ua | Jun 2026 |
| ristbd.com | Dec 2025 |