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 |
|---|---|---|---|
| cotweet.com | #913,647 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 12 more | Find emails |
| compucram.com | #913,835 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 16 more | Find emails |
| raisin-bank.cz | #914,574 | Amazon (ACM), Amazon CloudFront, Netlify + 4 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| esigns.com | #916,000 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| cadentitero.com | #916,983 | Amazon (ACM), Amazon Route 53, Contentful + 5 more | Find emails |
| trendcarpet.es | #917,232 | Bootstrap, ClickTale (Contentsquare), Cloudflare + 9 more | Find emails |
| livedownloads.com | #920,201 | Amazon Route 53, Amplitude, Cloudflare edge/CDN + 7 more | Find emails |
| pewrsr.ch | #920,589 | Amazon (ACM), Amazon Route 53, Foundation + 5 more | Find emails |
| katespade.de | #921,770 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 10 more | Find emails |
| smava-stage.de | #922,228 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| sforce.co | #922,921 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 12 more | Find emails |
| incorporate.com | #923,718 | Azure Front Door, Bootstrap, Google Tag Manager + 5 more | Find emails |
| diligentintel.com | #931,356 | Azure DNS, Let's Encrypt, Marketo + 6 more | Find emails |
| serviz.com | #943,325 | Akamai edge/CDN, Akamai mPulse, Amazon Route 53 + 6 more | Find emails |
| pocruises.com.au | #947,974 | ASP.NET, Akamai Bot Manager, Akamai Edge DNS + 6 more | Find emails |
| waterfilterbiz.com | #950,879 | ASP.NET, Bootstrap | Find emails |
| zix.com | #951,875 | Google Tag Manager, Let's Encrypt, Next.js + 2 more | Find emails |
| vaultverify.com | #952,247 | Akamai Edge DNS, Bootstrap, Google Tag Manager + 4 more | Find emails |
| asos.fr | #953,267 | Akamai Bot Manager, Akamai Edge DNS, Akamai edge/CDN + 7 more | Find emails |
| raisin.dk | #953,554 | Amazon (ACM), Amazon CloudFront, Netlify + 4 more | Find emails |
| axa-insurance.co.uk | #953,681 | Azure API Management, Cloudflare edge/CDN, Dynatrace + 2 more | Find emails |
| wholesalefashionsquare.com | #953,687 | Cloudflare Bot Management, Cloudflare edge/CDN, Dynatrace + 6 more | Find emails |
| rsagroup.com | #953,862 | Amazon CloudFront, Amazon S3, CSC (Digital Brand Services) + 7 more | Find emails |
| bbcgardenersworldlive.com | #953,873 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 4 more | Find emails |
| nitrocollege.com | #953,874 | Amazon Route 53, Cloudflare Bot Management, Cloudflare edge/CDN + 6 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 →