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 |
|---|---|---|---|
| lostmss.co.uk | #492,829 | Backbone.js, Baidu Analytics, Google Tag Manager + 4 more | Find emails |
| foronuclear.org | #492,902 | AddToAny, Bootstrap, Elementor + 12 more | Find emails |
| betpera.com | #493,361 | All in One SEO, Bootstrap, Font Awesome + 9 more | Find emails |
| #1,036 (Tranco) |
| Find emails |
| 5 | alphonso.tv | #1,063 (Tranco) | Find emails |
| warlegend.net | #493,746 | Apache, Cloudflare, Font Awesome + 9 more | Find emails |
| freshbros.com | #494,344 | Adobe Fonts (Typekit), Font Awesome, Google Analytics + 10 more | Find emails |
| sipsmith.com | #494,587 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 8 more | Find emails |
| angusreidusa.com | #494,693 | Amazon (ACM), Amazon Route 53, Apache + 14 more | Find emails |
| bluebookservices.com | #494,945 | Cloudflare Bot Management, Cloudflare edge/CDN, CookieHub + 18 more | Find emails |
| galapagosconservation.org.uk | #494,950 | Cloudflare, Cloudflare edge/CDN, Foundation + 13 more | Find emails |
| lavra.ua | #494,992 | Bootstrap, Font Awesome, Google Analytics + 12 more | Find emails |
| petsmall.pk | #495,185 | Bootstrap, Google Fonts, Google Trust Services + 7 more | Find emails |
| yellmagazine.com | #495,363 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| firenzecard.it | #495,529 | Apache, Bootstrap, Drupal + 4 more | Find emails |
| saintcorporation.com | #496,300 | Divi, Fastly, Google Fonts + 12 more | Find emails |
| nursece4less.com | #496,393 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 10 more | Find emails |
| sergioperfumerias.com | #496,504 | Bootstrap, Divi, Google Analytics + 13 more | Find emails |
| rjcollege.edu.in | #496,619 | Backbone.js, Bootstrap, Font Awesome + 13 more | Find emails |
| envt.fr | #496,766 | Bootstrap, Font Awesome, Let's Encrypt + 8 more | Find emails |
| ucavila.es | #496,954 | Bootstrap, Font Awesome, Google Ads Conversion + 9 more | Find emails |
| jansenmedicalpro.com | #497,044 | Bootstrap, Font Awesome, Google Fonts + 5 more | Find emails |
| smartplatform.fr | #497,073 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 8 more | Find emails |
| siteboomhosting.com | #497,128 | Font Awesome, Google Analytics, Google Fonts + 11 more | Find emails |
| kronosquartet.org | #497,393 | Cloudflare, Cloudflare edge/CDN, Fastly + 9 more | Find emails |
| sekido-rc.com | #497,631 | All in One SEO, Font Awesome, Google Ads Conversion + 12 more | Find emails |
| stelvision.com | #497,675 | Apache, Fancybox, Microsoft 365 + 8 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 →