FluxBB vs vBulletin
Head-to-head usage across the sites we track.
Top sites by authority
FluxBB · vBulletin · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 8+
2
7
Open Page Rank 7+
4
37
Open Page Rank 6+
6
70
Open Page Rank 5+
8
131
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
FluxBB · vBulletin · share of sites in each country using one or the other
United States
23
1,547
Germany
17
1,011
United Kingdom
14
933
Canada
15
782
France
27
658
Russia
11
613
Netherlands
13
609
Italy
14
571
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | FluxBB | vBulletin |
|---|---|---|
| LCP | 1.2 s | 1.4 s |
| INP | 50 ms | 75 ms |
| CLS | 0 | 0 |
| TTFB | 400 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.