AB Tasty vs Optimizely
Head-to-head usage across the sites we track.
Top sites by authority
AB Tasty · Optimizely · how many of each technology's sites sit in the web's highest authority tiers
Open Page Rank 9+
7
31
Open Page Rank 8+
97
400
Open Page Rank 7+
299
1,147
Open Page Rank 6+
551
1,808
Open Page Rank 5+
863
2,607
Open Page Rank scores 0 to 10 from the open web link graph; 9+ covers only a few hundred domains worldwide.
By country
AB Tasty · Optimizely · share of sites in each country using one or the other
United States
2,041
28,637
Canada
1,557
7,019
United Kingdom
1,901
5,243
India
1,406
5,573
France
2,078
4,064
Germany
1,643
3,936
Australia
987
4,573
Spain
1,604
3,659
Audience countries from the Chrome UX Report, top markets of either technology.
Real user performance
| Metric | AB Tasty | Optimizely |
|---|---|---|
| LCP | 2 s | 2 s |
| INP | 125 ms | 100 ms |
| CLS | 0 | 0.05 |
| TTFB | 800 ms | 800 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.
Sites that switched
Domains that dropped one technology and adopted the other within about a year, data nobody else gives away free.
AB Tasty to Optimizely
| Domain | When |
|---|---|
| aesop.com | Sep 2025 |
Optimizely to AB Tasty
| Domain | When |
|---|---|
| shoecarnival.com | Mar 2026 |