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
31
Open Page Rank 8+
235
401
Open Page Rank 7+
850
1,141
Open Page Rank 6+
1,759
1,788
Open Page Rank 5+
3,683
2,572
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
United States
20,910
25,512
Spain
40,362
3,112
Germany
38,227
3,412
France
36,059
3,284
Italy
29,561
2,888
United Kingdom
17,694
4,567
Netherlands
15,238
2,940
Canada
8,983
6,167
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Complianz | Optimizely |
|---|---|---|
| LCP | 2.3 s | 2 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, 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.
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 |