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 |
|---|---|---|---|
| levis.com.au | #305,046 | Bazaarvoice, Cloudflare edge/CDN, Constructor.io + 11 more | Find emails |
| 1stcentralinsurance.com | #305,565 | Adobe Experience Cloud (Launch), Azure Front Door, Bootstrap + 6 more | Find emails |
| virginradio.ca | #305,645 | Akamai edge/CDN, Akamai mPulse, Amazon Advertising + 18 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| usetallie.com | #305,853 | Amazon Route 53, Bootstrap, Google Ads Conversion + 12 more | Find emails |
| rmwilliams.com.au | #306,791 | Adobe Audience Manager, Adobe Fonts (Typekit), Adyen + 43 more | Find emails |
| engie.nl | #308,438 | ASP.NET, Amazon Route 53, Azure API Management + 6 more | Find emails |
| mining.sandvik | #308,514 | Azure API Management, Cloudflare edge/CDN, Google Tag Manager + 3 more | Find emails |
| qantasmoney.com | #309,221 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 6 more | Find emails |
| moodyradio.org | #309,868 | ASP.NET, Amazon (ACM), Amazon CloudFront + 4 more | Find emails |
| lovetheatre.com | #309,957 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 19 more | Find emails |
| verisae.com | #310,610 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 5 more | Find emails |
| psychicsource.com | #310,934 | ASP.NET, DigiCert, Google Tag Manager + 6 more | Find emails |
| zorgvisie.nl | #311,067 | Apache, DoubleClick (Google Ads), Font Awesome + 13 more | Find emails |
| kashflow.com | #311,266 | Adobe Audience Manager, Cloudflare, Cloudflare edge/CDN + 3 more | Find emails |
| swiftcoverbreakdown.com | #311,267 | AOS, Azure API Management, Bootstrap + 7 more | Find emails |
| pailottery.com | #312,006 | Cloudflare Bot Management, Cloudflare edge/CDN, Django + 3 more | Find emails |
| chadwicks.com | #312,074 | ASP.NET, Akamai Bot Manager, Akamai edge/CDN + 9 more | Find emails |
| unicef.ca | #313,194 | DoubleClick (Google Ads), Drupal, Fastly + 11 more | Find emails |
| europebet.com | #313,622 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 4 more | Find emails |
| deferit.com | #313,934 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| nicelabel.com | #315,554 | 6sense, AOS, Azure API Management + 15 more | Find emails |
| whatis.com | #315,895 | Chartbeat, Cloudflare edge/CDN, DoubleClick (Google Ads) + 6 more | Find emails |
| exploresetoyota.com | #318,072 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 6 more | Find emails |
| adc.com | #318,528 | Adobe Fonts (Typekit), Azure API Management, Cloudflare edge/CDN + 7 more | Find emails |
| sellmytimesharenow.com | #319,149 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 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 →