Complianz vs Optimizely
Head-to-head usage across the sites we track.
Top sites by authority
Complianz · Optimizely · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
12
32
Open Page Rank 8+
231
398
Open Page Rank 7+
853
1,140
Open Page Rank 6+
1,761
1,815
Open Page Rank 5+
3,676
2,633
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Complianz · Optimizely · share of sites in each country using one or the other
Spain
43,847
3,393
United States
21,228
25,713
Germany
37,735
3,558
France
37,286
3,449
Italy
31,506
3,129
United Kingdom
17,874
4,863
Netherlands
15,416
3,121
Canada
9,090
6,439
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Complianz | Optimizely |
|---|---|---|
| LCP | 2.3 s | 1.9 s |
| INP | 75 ms | 100 ms |
| CLS | 0 | 0.05 |
| TTFB | 1300 ms | 800 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
Optimizely to Complianz
| Domain | When |
|---|---|
| servicestreet.com | Jul 2026 |
| prideautocare.com | May 2026 |
| kerryscarcare.com | May 2026 |
| s-pankki.fi | Feb 2026 |