FluxBB vs phpBB
Head-to-head usage across the sites we track.
Top sites by authority
FluxBB · phpBB · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
0
4
Open Page Rank 8+
2
30
Open Page Rank 7+
4
106
Open Page Rank 6+
6
182
Open Page Rank 5+
8
297
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
FluxBB · phpBB · share of sites in each country using one or the other
Germany
17
1,989
United States
23
1,940
France
27
1,581
United Kingdom
14
1,317
Poland
12
1,271
Russia
11
1,175
Spain
12
992
Italy
14
984
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | FluxBB | phpBB |
|---|---|---|
| LCP | 1.2 s | 1.1 s |
| INP | 50 ms | 50 ms |
| CLS | 0 | 0 |
| TTFB | 400 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.