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 |
|---|---|---|---|
| solpro.ru | #238,884 | Backbone.js, Google Analytics, Google Fonts + 8 more | Find emails |
| heavenlyhappyhour.com | #239,235 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 9 more | Find emails |
| shamra-academia.com | #239,246 | Backbone.js, Bootstrap, Cloudflare + 14 more | Find emails |
| #1,036 (Tranco) |
| Find emails |
| 5 | alphonso.tv | #1,063 (Tranco) | Find emails |
| quackwatch.com | #239,398 | Adobe Fonts (Typekit), Backbone.js, Bootstrap + 13 more | Find emails |
| centerforinquiry.org | #239,574 | Backbone.js, Bootstrap, Cloudflare + 15 more | Find emails |
| ronangelo.com | #240,243 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 7 more | Find emails |
| obec.go.th | #240,705 | Let's Encrypt, OpenResty, PHP + 2 more | Find emails |
| lumpley.games | #240,935 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| datarecognitioncorp.com | #241,040 | Amazon Route 53, Drupal, Google Analytics + 16 more | Find emails |
| gptonline.ai | #241,056 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| breadfast.com | #241,117 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 16 more | Find emails |
| rolepages.com | #241,264 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 12 more | Find emails |
| ardnet.co.uk | #241,278 | All in One SEO, Bootstrap, Font Awesome + 11 more | Find emails |
| searchengineguru.com.au | #241,438 | Backbone.js, Bootstrap, Font Awesome + 8 more | Find emails |
| byte.fm | #241,877 | Bluesky, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| luxinlady.org | #242,485 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 10 more | Find emails |
| viff.org | #242,776 | Amazon CloudFront, Backbone.js, Cloudflare + 12 more | Find emails |
| holiday.by | #243,096 | Admixer, Bootstrap, Google Tag Manager + 13 more | Find emails |
| interaction.org | #243,198 | Fastly, Google Analytics, Google Tag Manager + 9 more | Find emails |
| atlanticconcierge-gy.com | #243,368 | AOS, Bootstrap, Calendly + 14 more | Find emails |
| tmsmed.net | #243,572 | Apache, Google Analytics, Google Fonts + 6 more | Find emails |
| spookyhousestudios.com | #244,242 | Apache, Modernizr, PHP + 3 more | Find emails |
| cloudlab.us | #244,521 | Apache, Bootstrap, Google Analytics + 5 more | Find emails |
| eastcountymagazine.org | #244,537 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 14 more | Find emails |
| homedeco.nl | #244,665 | Awin, Cloudflare, Cloudflare Web Analytics + 9 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 →