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 |
|---|---|---|---|
| lavenderskyhealth.com | #633,804 | AngularJS, Cloudflare Bot Management, Cloudflare edge/CDN + 10 more | Find emails |
| tsl.news | #633,827 | AppNexus, BidSwitch, Criteo + 15 more | Find emails |
| castor-watches.com | #634,186 | Brevo, Cloudflare, Cloudflare edge/CDN + 5 more | Find emails |
| #1,036 (Tranco) |
| Find emails |
| 5 | alphonso.tv | #1,063 (Tranco) | Find emails |
| deltasi.sn | #634,245 | Apache, Bootstrap, Font Awesome + 9 more | Find emails |
| vetsapiens.com | #634,851 | Cloudflare, Cloudflare edge/CDN, Elementor + 9 more | Find emails |
| nh-star.ru | #635,479 | All in One SEO, Font Awesome, Google Fonts + 6 more | Find emails |
| bukmekerov.net | #635,604 | DDoS-Guard, Fancybox, Google Analytics + 6 more | Find emails |
| reps-r-us.co.uk | #635,636 | DoubleClick (Google Ads), Google Ads Conversion, Google Analytics + 8 more | Find emails |
| powerbookmedic.com | #635,652 | Apache, Bootstrap, Fancybox + 7 more | Find emails |
| gkdoll.com | #635,958 | Cloudflare Turnstile, Google Analytics, Google Tag Manager + 8 more | Find emails |
| unicomgroup.com | #636,175 | Apache, Let's Encrypt, WordPress + 1 more | Find emails |
| tulipfestivalamsterdam.com | #636,255 | DoubleClick (Google Ads), Font Awesome, Google AdSense + 10 more | Find emails |
| elrincondelcarpfishing.com | #636,304 | Cloudflare Turnstile, Font Awesome, Google Analytics + 11 more | Find emails |
| brandsgateway.com | #636,432 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 11 more | Find emails |
| secondcityhockey.com | #637,099 | Cloudflare Turnstile, DoubleClick (Google Ads), Font Awesome + 13 more | Find emails |
| learnstage.com | #637,255 | All in One SEO, Cloudflare, Font Awesome + 7 more | Find emails |
| trailturdetania.es | #637,274 | Branch, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| dpccars.com | #637,338 | Apache, Backbone.js, Font Awesome + 7 more | Find emails |
| zeeuwsarchief.nl | #637,414 | Bootstrap, Google Fonts, Let's Encrypt + 6 more | Find emails |
| pqs.pe | #637,416 | Google AdSense, Google Analytics, Google Fonts + 8 more | Find emails |
| bcfasteners.com | #637,922 | Amazon Route 53, Google Tag Manager, Help Scout Beacon + 8 more | Find emails |
| satset138wiw.com | #638,007 | Branch, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| kybi.sk | #638,029 | Font Awesome, Google Fonts, Leaflet + 5 more | Find emails |
| banco-solidario.com | #638,042 | Azure DNS, Bootstrap, ConsentMo + 14 more | Find emails |
| gife.org.br | #638,050 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 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 →