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 |
|---|---|---|---|
| mykasih.com.my | #87,094 | Amazon (ACM), Amazon CloudFront, Amazon S3 + 9 more | Find emails |
| ozna.online | #87,114 | Bitrix, Bootstrap, Fancybox + 13 more | Find emails |
| gotoquiz.com | #87,124 | Apache, Feedburner, Google AdSense + 6 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| capitaliq.com |
| #87,140 |
| ASP.NET, Akamai Edge DNS, Bootstrap + 5 more |
| Find emails |
| atatus.com | #87,170 | Bootstrap, Express, Ghost + 15 more | Find emails |
| coincheck.com | #87,175 | Adobe Fonts (Typekit), Amazon (ACM), Amazon CloudFront + 13 more | Find emails |
| gd4d.co | #87,192 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 12 more | Find emails |
| sdu.edu.tr | #87,193 | ASP.NET, Bootstrap, ConsentMo + 15 more | Find emails |
| dualeotruyenhx.com | #87,196 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 10 more | Find emails |
| gabitos.com | #87,198 | Apache, Google AdSense, Google Tag Manager + 3 more | Find emails |
| qase.io | #87,211 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 26 more | Find emails |
| misterhorse.com | #87,213 | Google Cloud DNS, Google Fonts, Google Tag Manager + 4 more | Find emails |
| smartz.cloud | #87,233 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 2 more | Find emails |
| sudathi.com | #87,247 | Cloudflare, Cloudflare edge/CDN, GoKwik + 7 more | Find emails |
| cosmonova.net.ua | #87,310 | Google Tag Manager, JivoChat, Let's Encrypt + 7 more | Find emails |
| astrotalk.store | #87,314 | Amazon Route 53, Cloudflare edge/CDN, Criteo + 19 more | Find emails |
| greensky.com | #87,339 | Amazon CloudFront, Amazon Route 53, Amazon S3 + 18 more | Find emails |
| nsup.com | #87,348 | Apache, Google Optimize, Let's Encrypt + 2 more | Find emails |
| creattiva.cl | #87,353 | Bootstrap, Google Ads Conversion, Google Analytics + 11 more | Find emails |
| merateonline.it | #87,355 | ASP.NET, AddToAny, Bootstrap + 14 more | Find emails |
| rewardgateway.net | #87,365 | DigiCert, Nginx, Zendesk + 1 more | Find emails |
| placewise.com | #87,377 | Amazon Route 53, Gravatar, Let's Encrypt + 3 more | Find emails |
| journalgazette.net | #87,389 | Amazon Route 53, Google Fonts, Google Tag Manager + 5 more | Find emails |
| avweb.com | #87,393 | Cloudflare, CookieYes, DoubleClick (Google Ads) + 9 more | Find emails |
| ownerclan.com | #87,396 | Cloudflare, Cloudflare Bot Management, 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →