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+
401
1
Open Page Rank 7+
1,141
1
Open Page Rank 6+
1,788
12
Open Page Rank 5+
2,572
25
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
25,512
125
Canada
6,167
92
India
4,899
71
United Kingdom
4,567
80
Australia
4,029
61
Germany
3,412
45
France
3,284
36
Spain
3,112
32
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Optimizely | Pretty Damn Quick |
|---|---|---|
| LCP | 2 s | 1.8 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, Aug 2026. Lower is better; green meets Google's "good" threshold. This describes the sites that use each technology, not the technology's own overhead.