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 |
|---|---|---|---|
| salesforce-experience.com | #66,547 | Adobe Audience Manager, Akamai Bot Manager, Akamai edge/CDN + 13 more | Find emails |
| trinet.com | #66,623 | Cloudflare, Cloudflare Bot Management, Cloudflare Turnstile + 10 more | Find emails |
| novanthealth.org | #66,904 | Azure API Management, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| #274 (Tranco) |
| Find emails |
| 5 | gitlab.com | #393 (Tranco) | Find emails |
| sparefoot.com | #67,068 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 22 more | Find emails |
| efax.com | #67,332 | Adobe Fonts (Typekit), Bootstrap, Cloudflare Bot Management + 8 more | Find emails |
| thejockeyclub.co.uk | #67,352 | ASP.NET, Azure API Management, Cloudflare edge/CDN + 6 more | Find emails |
| heartandstroke.ca | #67,469 | ASP.NET, Azure API Management, Azure Front Door + 5 more | Find emails |
| financialforce.com | #67,887 | Amazon Route 53, AppNexus (Xandr), Azure API Management + 5 more | Find emails |
| cubesmart.com | #67,927 | Adobe Experience Cloud (Launch), Adobe Fonts (Typekit), Bootstrap + 16 more | Find emails |
| lesliespool.com | #67,931 | Adobe Fonts (Typekit), Affirm, Amplience + 15 more | Find emails |
| flash.pt | #68,069 | Chartbeat, DoubleClick (Google Ads), Gemius + 10 more | Find emails |
| zapier.app | #68,102 | Amazon (ACM), Amazon CloudFront, Cloudinary + 7 more | Find emails |
| callofdutymobile.com | #68,173 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Apache + 8 more | Find emails |
| northwest.bank | #68,309 | ASP.NET, Azure API Management, BrightEdge + 12 more | Find emails |
| regonline.com | #68,430 | 6sense, Adobe Experience Cloud (Launch), Amazon (ACM) + 15 more | Find emails |
| wef.org | #68,471 | ASP.NET, Bootstrap, Cloudflare Bot Management + 20 more | Find emails |
| nugs.net | #68,990 | ASP.NET, Amazon Route 53, Amplitude + 15 more | Find emails |
| visitabudhabi.ae | #69,139 | Azure API Management, Azure Front Door, Cloudflare + 8 more | Find emails |
| finanzen100.de | #69,324 | Astro, Font Awesome, Google AdSense + 10 more | Find emails |
| freeshipping.com | #69,340 | Cloudflare, Cloudflare edge/CDN, Cookiebot + 4 more | Find emails |
| cscglobal.com | #69,505 | Azure Front Door, Bootstrap, Google Tag Manager + 7 more | Find emails |
| zenefits.com | #70,196 | Arkose Labs, Cloudflare, Contentstack + 14 more | Find emails |
| viovet.co.uk | #70,224 | Cloudflare, Cloudflare edge/CDN, Cookiebot + 8 more | Find emails |
| indwes.edu | #70,582 | ASP.NET, AdRoll, Adobe Fonts (Typekit) + 15 more | Find emails |
| barcodesinc.com | #70,805 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 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 →