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 |
|---|---|---|---|
| vocabulary.com | #8,168 | Cloudflare, Cloudflare Bot Management, Cloudflare Web Analytics + 8 more | Find emails |
| cash.app | #8,184 | Amazon Route 53, Bugsnag, Cloudflare Bot Management + 16 more | Find emails |
| pdfcoffee.com | #8,239 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| clicktripz.com | #8,243 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 9 more | Find emails |
| hawaii.gov | #8,254 | Adyen, Akamai edge/CDN, Amazon CloudFront + 24 more | Find emails |
| aniworld.to | #8,261 | Cloudflare, DDoS-Guard, Font Awesome + 7 more | Find emails |
| intensedebate.com | #8,268 | Google Analytics, Gravatar, Let's Encrypt + 5 more | Find emails |
| bootstrapmade.com | #8,400 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 7 more | Find emails |
| javhd.today | #8,424 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| usg.edu | #8,440 | Amazon CloudFront, Apache, Atlassian Cloud + 11 more | Find emails |
| dedeman.ro | #8,449 | DigiCert, Fastly, Google Tag Manager + 2 more | Find emails |
| amateri.com | #8,458 | Cloudflare, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| onlinejobs.ph | #8,495 | Bootstrap, Clicky, Cloudflare + 16 more | Find emails |
| nhentai.xxx | #8,518 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 14 more | Find emails |
| wolvden.com | #8,541 | Bootstrap, Google Analytics, Google Fonts + 9 more | Find emails |
| xn--mgbkt9eckr.net | #8,557 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 7 more | Find emails |
| alo.bg | #8,558 | Apache, Google AdSense, Google Analytics + 2 more | Find emails |
| tumbex.com | #8,559 | ExoClick, Font Awesome, Google Analytics + 7 more | Find emails |
| momvids.com | #8,565 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 6 more | Find emails |
| getcourse.ru | #8,574 | Google Analytics, Google Tag Manager, Meta Pixel + 6 more | Find emails |
| olist.com | #8,578 | Amazon CloudFront, Amazon Route 53, Cloudflare Bot Management + 6 more | Find emails |
| loteriasyapuestas.es | #8,582 | Akamai Edge DNS, Apache, Font Awesome + 3 more | Find emails |
| poynter.org | #8,587 | Chartbeat, Cloudflare Bot Management, Cloudflare edge/CDN + 18 more | Find emails |
| diabetes.org | #8,594 | AddToAny, Cloudflare, Cloudflare edge/CDN + 8 more | Find emails |
| kaliscan.io | #8,658 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 13 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 →