CAPTCHA & Bot Protection
91,344 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9.1%). Google's CAPTCHA/bot-scoring widget, the most widely deployed CAPTCHA by far. Detection is homepage-level HTML/header fingerprinting, so a site can run reCAPTCHA on other pages without it showing here.
Other captcha & bot protection
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | snapchat.com | #123 (Tranco) | Find emails |
| 2 | apache.org | #125 (Tranco) | Find emails |
| 3 | one.one | #160 (Tranco) | Find emails |
| 4 | w3.org |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| zelt.ae | #131,209 | Bootstrap, Disqus, Fancybox + 20 more | Find emails |
| bdadyslexia.org.uk | #131,217 | Craft CMS, Google Tag Manager, Let's Encrypt + 3 more | Find emails |
| baykartech.com | #131,219 | Bootstrap, Chart.js, Cloudflare + 16 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| dallascollege.edu |
| #131,239 |
| Amazon (ACM), Amazon CloudFront, Apache + 8 more |
| Find emails |
| wipfli.com | #131,254 | AOS, ASP.NET, AppNexus (Xandr) + 24 more | Find emails |
| tptoys.com | #131,275 | Adobe Fonts (Typekit), Awin, Axios + 25 more | Find emails |
| cipnet.com.br | #131,298 | Fancybox, Google Fonts, Let's Encrypt + 7 more | Find emails |
| nhrscience.com | #131,304 | Cloudflare edge/CDN, Google Analytics, Google Fonts + 7 more | Find emails |
| bitcoin.de | #131,315 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 6 more | Find emails |
| maltego.com | #131,318 | Azure Front Door, Cloudflare Bot Management, Cloudflare edge/CDN + 19 more | Find emails |
| easydnssec.com | #131,321 | AddToAny, Adobe Fonts (Typekit), Apache + 9 more | Find emails |
| portalwebhosting.com | #131,323 | ASP.NET, Apache, Bootstrap + 6 more | Find emails |
| melissa.com.br | #131,345 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 7 more | Find emails |
| duocircle.com | #131,364 | Amazon Route 53, Astro, Freshchat + 10 more | Find emails |
| activisionblizzard.com | #131,371 | Adobe Experience Cloud (Launch), Akamai Edge DNS, Amazon CloudFront + 12 more | Find emails |
| actugaming.net | #131,375 | Bluesky, Cloudflare, Cloudflare Turnstile + 7 more | Find emails |
| gpltimes.com | #131,376 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 3 more | Find emails |
| via.com.tw | #131,382 | Bootstrap, Cloudflare Bot Management, Cloudflare edge/CDN + 6 more | Find emails |
| bbts.net | #131,395 | Apache, Bootstrap, Slick Carousel + 4 more | Find emails |
| modulebazaar.com | #131,397 | DMCA.com Protection, Font Awesome, Google Analytics + 13 more | Find emails |
| cinelab.ru | #131,407 | Google Fonts, Nginx, PHP + 5 more | Find emails |
| intervieweb.it | #131,411 | Bootstrap, Bunny Fonts, Cloudflare + 22 more | Find emails |
| ckan.org | #131,425 | Amazon (ACM), Amazon CloudFront, Amazon S3 + 11 more | Find emails |
| reskyt.com | #131,429 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 12 more | Find emails |
| mystatemls.com | #131,442 | AOS, Ahrefs Analytics, Bootstrap + 17 more | Find emails |
Showing the first 10,000matches — add a filter to narrow.
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 →