JavaScript Library & Framework
1,063 of the 1,000,000 top sites in our Tranco top-1M census run Polyfill.io (0.1%). A JavaScript polyfill service that served browser-compatibility shims to older or unsupported browsers from a CDN. Detection is homepage-level HTML/header fingerprinting, so a site can run Polyfill.io on other pages without it showing here.
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | theguardian.com | #192 (Tranco) | Find emails |
| 2 | guardian.co.uk | #2,366 (Tranco) | Find emails |
| 3 | thehindu.com | #2,899 (Tranco) | Find emails |
| 4 | bancointer.com.br |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| gtleagues.com | #632,067 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 5 more | Find emails |
| cryptofacilities.com | #633,644 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 6 more | Find emails |
| nudieglow.com | #634,956 | Cloudflare edge/CDN, CrazyEgg, Google Cloud DNS + 7 more | Find emails |
| #4,979 (Tranco) |
| Find emails |
| 5 | toptoon.com | #9,168 (Tranco) | Find emails |
| thecloudies.com | #638,423 | Cloudflare edge/CDN, Convert, Google Ads Conversion + 20 more | Find emails |
| aux33tours.com | #638,425 | Cloudflare, Cloudflare edge/CDN, Google Maps + 6 more | Find emails |
| uec.ch | #638,612 | Font Awesome, Google Analytics, Google Fonts + 6 more | Find emails |
| opuseps.com | #638,733 | Amazon (ACM), Amazon Route 53, Bootstrap + 9 more | Find emails |
| qualityfarmsupply.com | #639,266 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 17 more | Find emails |
| dubuypk.com | #640,790 | Cloudflare edge/CDN, Google Hosted Libraries, Let's Encrypt + 7 more | Find emails |
| koumuin-right.co.jp | #640,867 | Google Tag Manager, Let's Encrypt, Lodash + 7 more | Find emails |
| sior.com | #641,360 | ASP.NET, Adobe Fonts (Typekit), Cloudflare + 16 more | Find emails |
| hkland.com | #642,359 | Adobe Experience Cloud (Launch), Apache, DigiCert + 3 more | Find emails |
| meinmaison.de | #643,076 | Cloudflare edge/CDN, Google Ads Conversion, Google Analytics + 13 more | Find emails |
| researchdive.com | #643,263 | Bootstrap, Cloudflare, Font Awesome + 19 more | Find emails |
| jessfraz.com | #643,743 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 8 more | Find emails |
| lumere.com | #643,876 | ASP.NET, Amazon Route 53, Bootstrap + 21 more | Find emails |
| frontline.in | #644,883 | Amplitude, Bootstrap, Chartbeat + 12 more | Find emails |
| rs2-6chic.net | #645,190 | Bootstrap, Fancybox, Font Awesome + 7 more | Find emails |
| brasseriezedel.com | #646,983 | Google Fonts, Let's Encrypt, Microsoft 365 + 6 more | Find emails |
| jakilondon.com | #647,901 | Attentive, Bootstrap, Cloudflare edge/CDN + 15 more | Find emails |
| ritikart.com | #650,553 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| l-objet.com | #650,935 | Cloudflare edge/CDN, Font Awesome, Google Tag Manager + 12 more | Find emails |
| pharmacieeiffelcommerce.com | #651,773 | Apache, Bootstrap, Datadog + 12 more | Find emails |
| barb.co.uk | #655,049 | Bootstrap, Cloudflare, Font Awesome + 8 more | Find emails |
| techspace.ma | #660,299 | Ahrefs Analytics, Cloudflare, Cloudflare edge/CDN + 14 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 →