Optimizely vs Pretty Damn Quick
Head-to-head usage across the sites we track.
Top sites by authority
Optimizely · Pretty Damn Quick · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
31
1
Open Page Rank 8+
400
1
Open Page Rank 7+
1,147
1
Open Page Rank 6+
1,808
11
Open Page Rank 5+
2,607
20
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Optimizely · Pretty Damn Quick · share of sites in each country using one or the other
United States
28,637
126
Canada
7,019
83
India
5,573
64
United Kingdom
5,243
76
Australia
4,573
60
France
4,064
35
Germany
3,936
39
Spain
3,659
30
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Optimizely | Pretty Damn Quick |
|---|---|---|
| LCP | 2 s | 1.9 s |
| INP | 100 ms | 125 ms |
| CLS | 0.05 | 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.