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+
1
30
Open Page Rank 7+
3
99
Open Page Rank 6+
5
159
Open Page Rank 5+
6
256
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
United States
21
1,626
Germany
14
1,630
France
22
1,308
United Kingdom
14
1,151
Poland
10
1,112
Russia
10
1,067
Spain
12
905
Italy
13
872
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 | 500 ms | 500 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.