Websites Powered by Optimizely

64,980 websites tracked using Optimizely (A/B Testing) · www.optimizely.com

Optimizely is a tool for running A/B and multivariate experiments to compare page variants. Its official site is optimizely.com. PoweredBy tracks the websites that use Optimizely across the public web; the tracked counts, adoption trend, and site list on this page are updated from our ongoing crawl of the a/b testing ecosystem.

Usage trend

Core Web Vitals

Median site among 31,931 Optimizely sites with Chrome UX data, p75 values, Jun 2026.

Top countries

United States 28,637

Canada 7,019

India 5,573

United Kingdom 5,243

Australia 4,573

France 4,064

Germany 3,936

Spain 3,659

Sites using Optimizely by audience country, Chrome UX Report.

Top sites by authority

The share of the web's most authoritative domains, by Open Page Rank tier, seen running Optimizely in recent crawls. Only 372 domains worldwide score 9 or higher.

Websites using Optimizely

Open Page Rank is the domain's authority score (0 to 10, from the open web link graph); the list is ordered by it and covers sites seen in recent crawls. Visits and keywords are estimated US organic search figures.

Download top 10,000 as CSV (zip) →

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