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 |
|---|---|---|---|
| canon.cz | #732,863 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| agecymru.wales | #732,989 | Azure API Management, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| jeunessejecoute.ca | #734,321 | AOS, AddThis, CleanTalk + 14 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| collectivemedical.com | #734,503 | Chart.js, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| canon.fi | #734,927 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| asos.de | #735,880 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 7 more | Find emails |
| trade.co.uk | #735,927 | Amazon CloudFront, Bazaarvoice, Microsoft 365 + 6 more | Find emails |
| headwaycapital.com | #736,946 | Adobe Experience Cloud (Launch), Bootstrap, Datadog + 8 more | Find emails |
| mybanker.dk | #737,006 | Bugsnag, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| fundyfuneralhome.com | #738,507 | Amazon Route 53, Cloudflare Bot Management, Cloudflare Turnstile + 9 more | Find emails |
| mycarfax.com | #738,554 | Amazon (ACM), Amazon CloudFront, Blue Triangle + 6 more | Find emails |
| infinityauto.com | #741,064 | Akamai edge/CDN, Akamai mPulse, Amazon Route 53 + 7 more | Find emails |
| rightmart.de | #743,272 | Consentmanager.net, Google Cloud DNS, Let's Encrypt + 5 more | Find emails |
| smithandsmith.co.nz | #743,830 | CSC (Digital Brand Services), Elfsight, Fastly + 11 more | Find emails |
| psglearning.com | #744,282 | Cloudflare, Cloudflare edge/CDN, Ensighten + 11 more | Find emails |
| glasgowprestwick.com | #744,448 | Amazon CloudFront, Cloudflare Bot Management, Cloudflare edge/CDN + 15 more | Find emails |
| sparkcentral.com | #745,020 | Amazon Route 53, Contentful, Google Tag Manager + 7 more | Find emails |
| seiumb.com | #747,135 | Amazon Route 53, Bootstrap, DigiCert + 8 more | Find emails |
| raisin.lv | #747,385 | Amazon (ACM), Amazon CloudFront, Netlify + 4 more | Find emails |
| attrubyhcp.com | #761,343 | AOS, Cloudflare Bot Management, Cloudflare edge/CDN + 9 more | Find emails |
| aucklandtransport.govt.nz | #761,371 | DigiCert, Google Fonts, Google Tag Manager + 1 more | Find emails |
| canon.ua | #767,779 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| cashper.at | #768,354 | ASP.NET, Bootstrap, Google Fonts + 8 more | Find emails |
| cashperplus.es | #768,355 | ASP.NET, Bootstrap, Google Fonts + 8 more | Find emails |
| electrolux.com.tw | #778,361 | ASP.NET, Akamai Edge DNS, Akamai edge/CDN + 4 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 →