Google Optimize vs Optimizely
Head-to-head usage across the sites we track.
Top sites by authority
Google Optimize · Optimizely · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
Google Optimize · Optimizely · share of sites in each country using one or the other
United States
19,616
25,713
India
11,660
5,059
Canada
9,812
6,439
United Kingdom
10,689
4,863
Germany
8,571
3,558
France
7,579
3,449
Australia
6,828
4,155
Spain
7,482
3,393
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | Google Optimize | Optimizely |
|---|---|---|
| LCP | 2 s | 1.9 s |
| INP | 100 ms | 100 ms |
| CLS | 0 | 0.05 |
| TTFB | 800 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.
Google Optimize to Optimizely
| Domain | When |
|---|---|
| hartsofstur.com | Sep 2026 |
| aliceandolivia.com | Sep 2026 |
| gloverhomesandland.com | Mar 2026 |
| mbofedh.com | Feb 2026 |
| frontrowinsurance.com | Jan 2026 |