Bootstrap vs CoreUI
Head-to-head usage across the sites we track.
Top sites by authority
Bootstrap · CoreUI · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
181
0
Open Page Rank 8+
3,822
5
Open Page Rank 7+
18,772
16
Open Page Rank 6+
39,549
39
Open Page Rank 5+
73,510
60
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bootstrap · CoreUI · share of sites in each country using one or the other
United States
783,149
156
India
375,468
138
Germany
285,193
74
United Kingdom
258,945
71
Brazil
247,896
78
France
233,698
64
Italy
215,264
56
Canada
174,973
59
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bootstrap | CoreUI |
|---|---|---|
| LCP | 1.8 s | 1.8 s |
| INP | 75 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 800 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.