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 |
|---|---|---|---|
| butterfly.co.jp | #343,064 | Google Fonts, Google Tag Manager, Let's Encrypt + 6 more | Find emails |
| uia-architectes.org | #343,141 | Apache, Bootstrap, Font Awesome + 15 more | Find emails |
| ikosuae.com | #343,200 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 6 more | Find emails |
| #1,036 (Tranco) |
| Find emails |
| 5 | alphonso.tv | #1,063 (Tranco) | Find emails |
| cvsu.edu.ph | #343,410 | Backbone.js, Cloudflare, Cloudflare edge/CDN + 5 more | Find emails |
| cmaanet.org | #343,610 | Cloudflare edge/CDN, Drupal, Google Fonts + 7 more | Find emails |
| mtomas.com | #344,014 | Apache, Font Awesome, Google Fonts + 3 more | Find emails |
| zhengjian.org | #344,131 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 6 more | Find emails |
| popup-builder.com | #344,205 | Bootstrap, Chart.js, Cloudflare + 11 more | Find emails |
| indigoneo.fr | #345,150 | Amazon (ACM), Amazon CloudFront, CSC (Digital Brand Services) + 12 more | Find emails |
| peterpane.de | #345,423 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 12 more | Find emails |
| hairuwear.com | #345,558 | Bootstrap, Fastly, Font Awesome + 12 more | Find emails |
| bedworld.net | #345,622 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| wartimes.ca | #345,926 | Apache, Fancybox, Font Awesome + 5 more | Find emails |
| av-studio.si | #346,111 | Adobe Fonts (Typekit), CookieYes, Font Awesome + 15 more | Find emails |
| imlss.com | #346,129 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| alaskacollection.com | #346,210 | ASP.NET, Adobe Fonts (Typekit), Azure API Management + 10 more | Find emails |
| makkahacademy.org | #346,441 | Cloudflare, Font Awesome, Google Fonts + 5 more | Find emails |
| asebearings.com | #346,611 | Bootstrap, Font Awesome, Google Fonts + 7 more | Find emails |
| vogue.ph | #346,695 | AddToAny, Adobe Fonts (Typekit), All in One SEO + 12 more | Find emails |
| tverlife.ru | #346,875 | All in One SEO, Google Fonts, Let's Encrypt + 4 more | Find emails |
| auctioneersoftware.com | #346,933 | Apache, ClickTale (Contentsquare), DoubleClick (Google Ads) + 14 more | Find emails |
| osfi-bsif.gc.ca | #346,988 | Adobe Experience Cloud (Launch), Drupal, Fastly + 5 more | Find emails |
| tradethatswing.com | #347,159 | AddToAny, CleanTalk, Cloudflare + 10 more | Find emails |
| soliternistromy.cz | #347,171 | All in One SEO, Font Awesome, Google Analytics + 7 more | Find emails |
| clasespasivas.net | #347,457 | Divi, Google AdSense, Google Analytics + 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 →