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
136
Open Page Rank 8+
16
2,252
Open Page Rank 7+
29
8,867
Open Page Rank 6+
39
16,799
Open Page Rank 5+
57
28,747
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
341
202,429
India
233
128,845
United Kingdom
244
88,730
Germany
180
88,540
Brazil
131
83,542
France
154
77,327
Canada
159
66,622
Indonesia
133
63,126
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, 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.
Flat UI to Tailwind CSS
| Domain | When |
|---|---|
| ristbd.com | Dec 2025 |