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 |
|---|---|---|---|
| imp.ch | #31,718 | Backbone.js, Bootstrap, Google Fonts + 4 more | Find emails |
| insurancebusinessmag.com | #31,930 | ASP.NET, Algolia, Azure API Management + 14 more | Find emails |
| gottman.com | #32,574 | Adobe Fonts (Typekit), Amazon Route 53, Cloudflare edge/CDN + 16 more | Find emails |
| #1,036 (Tranco) |
| Find emails |
| 5 | alphonso.tv | #1,063 (Tranco) | Find emails |
| campaign.gov.uk | #32,806 | Amazon CloudFront, Amazon Route 53, Fastly + 6 more | Find emails |
| fazenda.sp.gov.br | #32,856 | ASP.NET, Bootstrap, Font Awesome + 14 more | Find emails |
| osgeo.org | #33,194 | AddThis, Cloudflare, Google Hosted Libraries + 6 more | Find emails |
| militaryonesource.mil | #33,364 | AddToAny, Axios, Backbone.js + 12 more | Find emails |
| merrjep.al | #33,625 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 5 more | Find emails |
| mailo.com | #33,797 | Apache, Bluesky, Font Awesome + 5 more | Find emails |
| cancaonova.com | #33,822 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 10 more | Find emails |
| usb.org | #34,456 | Cloudflare, Cloudflare edge/CDN, Drupal + 8 more | Find emails |
| problogger.com | #34,503 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 14 more | Find emails |
| books2read.com | #34,517 | Backbone.js, Cloudflare, Cloudflare Web Analytics + 11 more | Find emails |
| chiesacattolica.it | #34,800 | Font Awesome, Google Fonts, Google Maps + 4 more | Find emails |
| acas.org.uk | #35,165 | ASP.NET, AddThis, Apache + 9 more | Find emails |
| lenscrafters.com | #35,271 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 15 more | Find emails |
| societe-des-avis-garantis.fr | #35,769 | Bootstrap, Cloudflare, Cloudflare Turnstile + 13 more | Find emails |
| uwgb.edu | #36,027 | ASP.NET, Google Tag Manager, Microsoft 365 + 5 more | Find emails |
| bengo4.com | #36,217 | Amazon Route 53, Criteo, Datadog + 13 more | Find emails |
| longdo.com | #36,648 | AddThis, Backbone.js, Cloudflare + 18 more | Find emails |
| cica.es | #37,132 | Apache, Backbone.js, Foundation + 10 more | Find emails |
| historic-uk.com | #37,152 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Fonts + 8 more | Find emails |
| ergo.de | #37,538 | Adobe Experience Cloud (Launch), Adobe Experience Manager Edge Delivery (Helix RUM), Amazon (ACM) + 6 more | Find emails |
| mlbtraderumors.com | #37,575 | Let's Encrypt, Microsoft 365, Nginx + 4 more | Find emails |
| armscontrol.org | #37,592 | Bootstrap, Cloudflare, Cloudflare Bot Management + 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 →