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.
Other a/b testing & personalization
| # | 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 |
|---|---|---|---|
| riksnet.se | #979,383 | Adyen, Amazon CloudFront, Amazon S3 + 17 more | Find emails |
| welt-sparer.at | #981,316 | Amazon (ACM), Amazon CloudFront, Netlify + 4 more | Find emails |
| wittichfuneralhome.com | #981,362 | Apache, Bootstrap, Font Awesome + 9 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| myrecafe.com | #981,779 | Amazon Route 53, Amplitude, Axios + 16 more | Find emails |
| tastingaustralia.com.au | #982,044 | ASP.NET, Adobe Experience Cloud (Launch), Azure API Management + 13 more | Find emails |
| her.is | #984,435 | Akamai Edge DNS, Amazon (ACM), Foundation + 6 more | Find emails |
| canon.pt | #986,382 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 13 more | Find emails |
| cybersixgill.com | #988,998 | Amazon Route 53, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| distilnetworks.com | #989,311 | 6sense, Amazon Route 53, Bizible + 9 more | Find emails |
| newrezservicing.com | #989,807 | ASP.NET, Bootstrap, DigiCert + 10 more | Find emails |
| aflq.com.au | #990,326 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 15 more | Find emails |
| barletti.com | #990,696 | Let's Encrypt, Next.js, Vercel + 1 more | Find emails |
| wpportfolio.net | #991,902 | AB Tasty, ActiveCampaign, AdRoll + 120 more | Find emails |
| medicaresupplement.com | #992,579 | ASP.NET, Amazon (ACM), Amazon Route 53 + 6 more | Find emails |
| salesforceairesearch.com | #995,111 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 11 more | Find emails |
| springer-sbm.com | #995,919 | Fastly, Google Analytics, Google Fonts + 4 more | Find emails |
| ourdailybread.org | #996,431 | Amazon Route 53, Azure API Management, Cloudflare edge/CDN + 2 more | Find emails |
| axaschengeninsurance.com | #997,151 | CrazyEgg, DigiCert, Google Tag Manager + 2 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 →