Aura vs Bootstrap
Head-to-head usage across the sites we track.
Top sites by authority
Aura · Bootstrap · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
38
181
Open Page Rank 8+
359
3,817
Open Page Rank 7+
805
18,570
Open Page Rank 6+
1,134
39,005
Open Page Rank 5+
1,439
72,373
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Aura · Bootstrap · share of sites in each country using one or the other
United States
2,771
758,929
India
1,950
368,409
Germany
1,518
277,428
United Kingdom
1,869
255,833
Brazil
1,225
241,343
France
1,450
234,434
Italy
1,340
222,549
Spain
1,421
183,194
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Aura | Bootstrap |
|---|---|---|
| LCP | 2.1 s | 1.8 s |
| INP | 100 ms | 75 ms |
| CLS | 0.05 | 0 |
| TTFB | 700 ms | 800 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.