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.
| # | 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 |
|---|---|---|---|
| sentree.io | #116,808 | Adobe Fonts, Adobe Fonts (Typekit), Amazon CloudFront + 19 more | Find emails |
| myconfinedspace.com | #116,867 | Apache, Font Awesome, Google AdSense + 9 more | Find emails |
| vouchercloud.com | #116,881 | Cloudflare Bot Management, Cloudflare edge/CDN, Google Analytics + 1 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| shpl.ru | #116,902 | Fancybox, Let's Encrypt, Nginx + 6 more | Find emails |
| aosom.com | #116,916 | Akamai edge/CDN, Akamai mPulse, Amazon Route 53 + 5 more | Find emails |
| oceanairuk.com | #116,934 | Cloudflare, Cloudflare edge/CDN, CookieFirst + 6 more | Find emails |
| apstylebook.com | #116,940 | Amazon (ACM), Amazon Route 53, Bluesky + 7 more | Find emails |
| dia.mil | #116,946 | AOS, ASP.NET, Bootstrap + 11 more | Find emails |
| steepster.com | #116,993 | AdRoll, Cloudflare, Cloudflare Web Analytics + 10 more | Find emails |
| babysquare.ca | #116,995 | BigCommerce, CrazyEgg, DigiCert + 9 more | Find emails |
| mistertennis.com | #117,018 | Bootstrap, Criteo, Google Tag Manager + 9 more | Find emails |
| lawyersclubindia.com | #117,022 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 11 more | Find emails |
| optimizepress.com | #117,035 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 3 more | Find emails |
| socialmediaweek.org | #117,043 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 11 more | Find emails |
| nationallife.com | #117,057 | Akamai Edge DNS, Akamai edge/CDN, Akamai mPulse + 16 more | Find emails |
| visitbrighton.com | #117,063 | ASP.NET, AudioEye, Google Analytics + 7 more | Find emails |
| firstcommand.com | #117,066 | ASP.NET, Microsoft IIS, Next.js + 5 more | Find emails |
| wego.jp | #117,069 | Cloudflare edge/CDN, Font Awesome, Google Ads Conversion + 11 more | Find emails |
| tonyschocolonely.com | #117,070 | Azure DNS, Cloudflare edge/CDN, Klaviyo + 6 more | Find emails |
| ces.net | #117,077 | Apache, Bootstrap, Google Analytics + 5 more | Find emails |
| umart.com.au | #117,078 | Amazon (ACM), Apache, Bootstrap + 5 more | Find emails |
| bolterandchainsword.com | #117,086 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 4 more | Find emails |
| synonyms.com | #117,094 | Amazon (ACM), Amazon Route 53, Apache + 6 more | Find emails |
| ffii.org | #117,095 | Apache, DigiCert, Gravatar + 5 more | Find emails |
| snappa.com | #117,102 | Adobe Fonts (Typekit), Cloudflare, Cloudflare Bot Management + 6 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 →