Bold Brain vs Vitals
Head-to-head usage across the sites we track.
Top sites by authority
Bold Brain · Vitals · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
1
Open Page Rank 8+
0
3
Open Page Rank 7+
0
6
Open Page Rank 6+
0
9
Open Page Rank 5+
0
29
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Bold Brain · Vitals · share of sites in each country using one or the other
United States
9
3,566
United Kingdom
5
1,463
India
3
1,304
Canada
5
1,060
Germany
4
990
Australia
3
984
France
4
979
Spain
4
663
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Bold Brain | Vitals |
|---|---|---|
| LCP | 2.5 s | 1.6 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 800 ms | 500 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.