A/B Testing & Personalization
1,843 of the 1,000,000 top sites in our Tranco top-1M census run Optimizely (0.2%). An experimentation platform for running A/B tests and personalizing website content. Detection is homepage-level HTML/header fingerprinting, so a site can run Optimizely on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | bit.ly | #102 (Tranco) | Find emails |
| 2 | bbc.com | #210 (Tranco) | Find emails |
| 3 | hp.com | #270 (Tranco) | Find emails |
| 4 | salesforce.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| napapijri.co.uk | #341,610 | Akamai Edge DNS, Cloudflare edge/CDN, Let's Encrypt + 1 more | Find emails |
| lightning.com | #342,087 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 13 more | Find emails |
| canon-me.com | #342,382 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| mckesson.org | #342,628 | Azure API Management, Cloudflare edge/CDN, GSAP + 8 more | Find emails |
| knauf.de | #344,324 | Adobe Experience Cloud (Launch), Cloudflare, Cloudflare Bot Management + 7 more | Find emails |
| bitpipe.com | #344,393 | Chartbeat, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| adaptbyalign.com | #344,470 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
| signals.com | #344,561 | ASP.NET, Akamai Bot Manager, Akamai edge/CDN + 9 more | Find emails |
| invisiblechildren.com | #344,867 | Adobe Fonts (Typekit), Bootstrap, Cloudflare + 14 more | Find emails |
| culturalcare.com | #345,401 | Adyen, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| lyleandscott.com | #345,911 | Bugsnag, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| wordperfect.com | #347,062 | Amazon Route 53, Apache, Bootstrap + 4 more | Find emails |
| cloudforce.com | #348,101 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 12 more | Find emails |
| vivaenergy.com.au | #348,199 | ASP.NET, Cloudflare, Cloudflare Bot Management + 7 more | Find emails |
| sproutstudio.com | #348,808 | Amazon (ACM), FirstPromoter, Font Awesome + 14 more | Find emails |
| servicechannel.eu | #349,125 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| forex.se | #349,139 | Azure API Management, Azure DNS, Cloudflare edge/CDN + 2 more | Find emails |
| vattenfall.fi | #350,318 | Azure API Management, Azure Front Door, Consentmanager.net + 2 more | Find emails |
| patientengagementhit.com | #350,526 | Chartbeat, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| delphix.com | #350,541 | Amazon Route 53, Cloudflare edge/CDN, DigiCert + 8 more | Find emails |
| grind.co.uk | #351,245 | Adobe Fonts (Typekit), Cloudflare edge/CDN, Let's Encrypt + 3 more | Find emails |
| moltonbrown.co.uk | #351,565 | Amplience, Cloudflare edge/CDN, Dynatrace + 9 more | Find emails |
| stage.es | #351,768 | Adobe Fonts, Adobe Fonts (Typekit), Azure Front Door + 6 more | Find emails |
| kaufdichgluecklich-shop.de | #352,743 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| invisalign.ca | #352,773 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 7 more | Find emails |
From the Crawlora Website Tech Stack Dataset, a homepage-level fingerprint of a 1,000,000-domain Tranco top-1M census (run top1m-2026-08-25-full-v2), snapshot August 29, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →