JavaScript Library & Framework
6,289 of the 1,000,000 top sites in our Tranco top-1M census run Underscore.js (0.6%). A utility JavaScript library providing functional helper methods for working with arrays, objects, and functions. Detection is homepage-level HTML/header fingerprinting, so a site can run Underscore.js on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | uk.com | #532 (Tranco) | Find emails |
| 2 | washington.edu | #773 (Tranco) | Find emails |
| 3 | eu.com | #891 (Tranco) | Find emails |
| 4 | us.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| everleap.com | #44,629 | ASP.NET, AdRoll, Adobe Fonts (Typekit) + 12 more | Find emails |
| kmu.edu.tw | #44,727 | Bootstrap, Font Awesome, Google Analytics + 6 more | Find emails |
| edjoin.org | #44,795 | ASP.NET, Amazon Route 53, DigiCert + 10 more | Find emails |
| #1,036 (Tranco) |
| Find emails |
| 5 | alphonso.tv | #1,063 (Tranco) | Find emails |
| geekbuying.com |
| #45,237 |
| AddThis, Amazon (ACM), Amazon CloudFront + 14 more |
| Find emails |
| wattsupwiththat.com | #45,749 | Blogger, Bootstrap, Font Awesome + 12 more | Find emails |
| gov.si | #45,822 | Fancybox, Matomo, jQuery | Find emails |
| univ-toulouse.fr | #46,245 | Bootstrap, Drupal, Font Awesome + 3 more | Find emails |
| goldwin.co.jp | #46,407 | Amazon (ACM), Backbone.js, Google Hosted Libraries + 11 more | Find emails |
| unoosa.org | #46,910 | Apache, Bootstrap, Font Awesome + 7 more | Find emails |
| grantland.com | #47,413 | DoubleClick (Google Ads), Google AdSense, Google Publisher Tag + 9 more | Find emails |
| openaccessgovernment.org | #47,904 | Cloudflare, Cloudflare edge/CDN, Cookie-Script + 11 more | Find emails |
| ouigo.com | #47,982 | AB Tasty, Azure Front Door, Didomi + 8 more | Find emails |
| infinitiusa.com | #48,164 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 3 more | Find emails |
| atomicorp.com | #48,234 | DoubleClick (Google Ads), Drift, Font Awesome + 22 more | Find emails |
| wwdjapan.com | #48,698 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 18 more | Find emails |
| tichyseinblick.de | #48,721 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 12 more | Find emails |
| paddock-gp.com | #48,815 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 12 more | Find emails |
| klsescreener.com | #48,885 | Bootstrap, Chart.js, Cloudflare + 23 more | Find emails |
| synaptics.com | #48,967 | Amazon CloudFront, Amazon S3, Bootstrap + 17 more | Find emails |
| guaranteed-reviews.com | #49,358 | Bootstrap, Cloudflare, Cloudflare Turnstile + 13 more | Find emails |
| netsparkmobile.com | #49,865 | Bootstrap, Cloudflare, Cookiebot + 15 more | Find emails |
| uniminuto.edu | #50,072 | AOS, ASP.NET, Bootstrap + 15 more | Find emails |
| insauga.com | #50,200 | Amazon Advertising, Blockthrough, Cloudflare + 18 more | Find emails |
| assets.kpmg | #50,321 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Apache + 3 more | Find emails |
| psychiatrist.com | #50,802 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 12 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 →