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 |
|---|---|---|---|
| petivity.com | #376,693 | Bazaarvoice, Cloudflare edge/CDN, Google Tag Manager + 12 more | Find emails |
| greenfi.com | #377,157 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 20 more | Find emails |
| qrcode-generator.de | #377,219 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| digitalinsurance.com | #377,432 | Azure API Management, CSC (Digital Brand Services), Cloudflare edge/CDN + 5 more | Find emails |
| mytmoclaim.com | #378,413 | ASP.NET, Apple Pay, Azure API Management + 11 more | Find emails |
| 4ormat.com | #378,536 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| usat.ly | #383,387 | Amazon (ACM), Foundation, Google Tag Manager + 5 more | Find emails |
| clipmarks.com | #383,636 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 13 more | Find emails |
| schengenseguros.eu | #383,717 | CrazyEgg, DigiCert, Google Tag Manager + 2 more | Find emails |
| trendcarpet.de | #384,093 | Bootstrap, ClickTale (Contentsquare), Cloudflare + 10 more | Find emails |
| workweek.com | #385,220 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| compareclub.com.au | #385,747 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| convertpro.net | #385,885 | AB Tasty, ActiveCampaign, AdRoll + 120 more | Find emails |
| ntw.com | #386,171 | ASP.NET, Akamai Edge DNS, Akamai edge/CDN + 11 more | Find emails |
| thereformation.fr | #386,443 | Amazon Route 53, Cloudflare edge/CDN, DoubleClick (Google Ads) + 8 more | Find emails |
| weekplan.net | #387,401 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 16 more | Find emails |
| goldcoastschools.com | #388,108 | Amazon Route 53, Apache, Bootstrap + 13 more | Find emails |
| carvel.com | #388,763 | Cloudflare Bot Management, Cloudflare edge/CDN, Contentful + 9 more | Find emails |
| pluga.co | #389,208 | Amazon CloudFront, Cloudflare, Cloudflare edge/CDN + 23 more | Find emails |
| corporatetraveler.us | #389,220 | Adobe Fonts (Typekit), Drupal, Fastly + 8 more | Find emails |
| cvent-planner.com | #389,512 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 16 more | Find emails |
| sandals.co.uk | #389,866 | Akamai Edge DNS, DigiCert, Google Tag Manager + 1 more | Find emails |
| datacenterresearch.org | #390,575 | Adobe Fonts (Typekit), All in One SEO, Cloudflare + 18 more | Find emails |
| rcgt.com | #393,779 | Azure API Management, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| browserhawk.com | #394,436 | ASP.NET, Google Analytics, Google Hosted Libraries + 5 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 →