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 |
|---|---|---|---|
| virginia.edu | #2,773 | Adobe Fonts (Typekit), Amazon CloudFront, Cludo + 22 more | Find emails |
| comscore.com | #2,785 | ASP.NET, Amazon (ACM), Amazon CloudFront + 8 more | Find emails |
| flurry.com | #2,796 | AWS Lambda, AddToAny, Adobe Fonts (Typekit) + 14 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| ciscospark.com | #2,814 | Akamai Bot Manager, Akamai edge/CDN, Akamai mPulse + 7 more | Find emails |
| phys.org | #2,816 | Apache, Bluesky, DoubleClick (Google Ads) + 5 more | Find emails |
| trafficjunky.net | #2,821 | Amazon Route 53, Bootstrap, Google Analytics + 7 more | Find emails |
| today.com | #2,864 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Akamai mPulse + 9 more | Find emails |
| narod.ru | #2,869 | Google Analytics, Google Tag Manager, LiveInternet (Yadro) + 5 more | Find emails |
| loopia.se | #2,882 | Bootstrap, DigiCert, Font Awesome + 4 more | Find emails |
| mihanwebhost.com | #2,900 | Bootstrap, Font Awesome, Google Analytics + 5 more | Find emails |
| ihc.ru | #2,906 | DDoS-Guard, Google Analytics, Google Tag Manager + 10 more | Find emails |
| imageshack.us | #2,934 | Google Analytics, Google Fonts, Google Tag Manager + 4 more | Find emails |
| newsbreak.com | #2,953 | AWS Lambda, Amazon (ACM), Amazon CloudFront + 23 more | Find emails |
| metro.co.uk | #2,981 | Akamai Edge DNS, Google Fonts, Let's Encrypt + 5 more | Find emails |
| ubereats.com | #3,004 | Adobe Audience Manager, Amazon Advertising, Arkose Labs + 37 more | Find emails |
| dictionary.com | #3,024 | Amazon Advertising, Amazon Route 53, Blockthrough + 12 more | Find emails |
| ntppool.org | #3,028 | Amazon CloudFront, Atlassian Cloud, Fastly + 8 more | Find emails |
| likeevideo.ru | #3,033 | Alibaba Cloud DNS, Kong, Nginx + 2 more | Find emails |
| habr.com | #3,037 | Google Fonts, Qrator, Sectigo + 1 more | Find emails |
| brookings.edu | #3,047 | Azure DNS, Cloudflare edge/CDN, Google Fonts + 14 more | Find emails |
| loom.com | #3,083 | Amazon (ACM), Amazon CloudFront, Amazon Route 53 + 15 more | Find emails |
| egnyte.com | #3,114 | AddThis, Akamai edge/CDN, ConsentMo + 17 more | Find emails |
| onaudience.com | #3,156 | Civic Cookie Control, Google Analytics, Google Tag Manager + 6 more | Find emails |
| hoster.kz | #3,168 | AOS, Bitrix, DigiCert + 11 more | Find emails |
| brandbucket.com | #3,191 | Cloudflare, Cloudflare edge/CDN, Google Trust Services + 1 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 →