Doofinder vs FAST ESP
Head-to-head usage across the sites we track.
Top sites by authority
Doofinder · FAST ESP · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
3
0
Open Page Rank 8+
13
1
Open Page Rank 7+
21
2
Open Page Rank 6+
41
3
Open Page Rank 5+
120
3
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Doofinder · FAST ESP · share of sites in each country using one or the other
Germany
4,292
39
France
4,055
13
Spain
3,242
12
United States
3,108
10
Italy
2,801
9
Belgium
2,144
7
United Kingdom
2,090
9
Austria
1,671
4
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Doofinder | FAST ESP |
|---|---|---|
| LCP | 1.9 s | 1.4 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0 |
| TTFB | 900 ms | 400 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.