TidyToolsTech Stack Index · detected

Technology · A/B testing

Websites using Optimizely

As of 2026-10-02, Optimizely (A/B testing) is detected on 11 of the 748 popular websites we analysed (1.5%), including zoom.us, cnn.com, bbc.com, gitlab.com and klaviyo.com.

Websites using Optimizely (11)

Technologies often used together with Optimizely

TechnologySites
Google Tag Manager9
OneTrust7
Cloudflare6
Akamai3
Akamai Bot Manager3
Cloudflare Bot Management3
Google Sign-In3
Next.js3
React3
Swiper3

By site category

tech (5), other (4), news (2).

FAQ

How many popular websites use Optimizely?
As of 2026-10-02, Optimizely (A/B testing) is detected on 11 of the 748 popular websites we analysed (1.5%), including zoom.us, cnn.com, bbc.com, gitlab.com and klaviyo.com.
Which websites use Optimizely?
bbc.com, clevelandclinic.org, cnn.com, eepurl.com, gitlab.com, klaviyo.com, mailchimp.com, ninjarmm.com, sky.com and typeform.com, and 1 more (full list on this page).
How do I find out what technology a website uses?
Open the site's page in the Tech Stack Index, or run the Tech Stack Detector API on any domain: it reads the home page HTML and headers and lists the CMS, framework, CDN and analytics with evidence.

Other A/B testing technologies

All technologies