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 |
|---|---|---|---|
| fusionnet.in | #52,277 | Bootstrap, Font Awesome, Google Ads Conversion + 8 more | Find emails |
| vio.com | #52,293 | Algolia, Amazon (ACM), Amazon CloudFront + 7 more | Find emails |
| mozzartsport.com | #52,305 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| taskus.com | #52,307 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Ads Conversion + 10 more | Find emails |
| abiyefon.com | #52,314 | Cloudflare, Cloudflare edge/CDN, Fancybox + 9 more | Find emails |
| bookwhen.com | #52,315 | DigiCert, Font Awesome, Google Analytics + 8 more | Find emails |
| markup.io | #52,321 | Amazon (ACM), Amazon CloudFront, Amazon S3 + 17 more | Find emails |
| nebraskamed.com | #52,361 | Bluesky, ConsentMo, Drupal + 7 more | Find emails |
| astutebot.com | #52,383 | Amazon Route 53, Google Analytics, Google Fonts + 2 more | Find emails |
| aerotelegraph.com | #52,386 | Amazon CloudFront, Bluesky, Express + 6 more | Find emails |
| crfb.org | #52,399 | Drupal, Google Tag Manager, Let's Encrypt + 4 more | Find emails |
| pulzo.com | #52,404 | Amazon (ACM), Amazon CloudFront, Apache + 11 more | Find emails |
| tmb.cat | #52,417 | Amazon (ACM), Amazon Route 53, Cookiebot + 3 more | Find emails |
| mytransgenderdate.com | #52,422 | Amazon (ACM), Amazon Route 53, Fastmail + 5 more | Find emails |
| smartpushedm.com | #52,452 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 9 more | Find emails |
| firsturl.de | #52,468 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| dnsfilter.com | #52,486 | Chargebee, Cloudflare, Cloudflare Bot Management + 20 more | Find emails |
| scientific.net | #52,510 | ASP.NET, Azure DNS, Eye-Able + 8 more | Find emails |
| dcm-ekurashi.com | #52,540 | Apache, ClickTale (Contentsquare), DigiCert + 7 more | Find emails |
| iqsdirectory.com | #52,553 | Bootstrap, Font Awesome, Google Fonts + 6 more | Find emails |
| telecomarmenia.am | #52,560 | Google Tag Manager, Laravel, Nginx + 2 more | Find emails |
| bibliocad.com | #52,572 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 9 more | Find emails |
| arrowheadpride.com | #52,574 | Amazon Advertising, Amazon Route 53, DoubleClick (Google Ads) + 14 more | Find emails |
| shopmicas.com | #52,588 | Cloudflare edge/CDN, ConsentMo, Google Hosted Libraries + 8 more | Find emails |
| nsn.fm | #52,611 | Disqus, Express, Google Tag Manager + 4 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →