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 |
|---|---|---|---|
| hulkapps.com | #23,557 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 10 more | Find emails |
| sciencemuseum.org.uk | #23,573 | ASP.NET, Bluesky, Cloudflare + 14 more | Find emails |
| internet.com | #23,583 | Apache, Axios, Bootstrap + 9 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| madison.com | #23,645 | 33Across, Advertising.com, Amazon Advertising + 45 more | Find emails |
| generationbi.com | #23,688 | Apache, Google Analytics, Google Identity Services + 6 more | Find emails |
| moy.su | #23,750 | Bootstrap, CleanTalk, Font Awesome + 8 more | Find emails |
| napster.com | #23,762 | AWS Lambda, Braze, Cloudflare + 12 more | Find emails |
| nm.org | #23,779 | ASP.NET, Azure DNS, Fancybox + 21 more | Find emails |
| geograph.org.uk | #23,780 | Cloudflare, Cloudflare Bot Management, Cloudflare Turnstile + 7 more | Find emails |
| islamicfinder.org | #23,840 | Amazon Route 53, Apache, CrazyEgg + 16 more | Find emails |
| vervehosting.com | #23,861 | Adobe Fonts (Typekit), Bootstrap, DigiCert + 6 more | Find emails |
| drmx.org | #23,862 | Apache, PHP | Find emails |
| wwf.org.uk | #23,863 | AB Tasty, AOS, Azure DNS + 16 more | Find emails |
| scalefusion.com | #23,877 | ActiveCampaign, Akamai Bot Manager, Akamai edge/CDN + 28 more | Find emails |
| waves.com | #23,917 | ASP.NET, Amazon Route 53, Azure API Management + 5 more | Find emails |
| leaseweb.net | #23,924 | Express, Font Awesome, Google Fonts + 2 more | Find emails |
| directadvert.ru | #23,929 | Cloudflare, Fancybox, Google Fonts + 5 more | Find emails |
| cynet.com | #23,934 | CHEQ, ClickCease, Cloudflare + 17 more | Find emails |
| seroundtable.com | #23,938 | Bluesky, Chart.js, Cloudflare + 14 more | Find emails |
| ipbase.com | #23,944 | Adobe Fonts, Adobe Fonts (Typekit), Cloudflare + 12 more | Find emails |
| treasurydirect.gov | #23,949 | Bootstrap, Cloudflare, US Government DAP + 1 more | Find emails |
| mediatoday.ru | #23,955 | Bitrix, Bootstrap, Let's Encrypt + 3 more | Find emails |
| widerplanet.com | #23,960 | Amazon (ACM), Amazon Route 53, Google Maps + 9 more | Find emails |
| monotype.com | #23,978 | Adobe Experience Cloud (Launch), Amazon (ACM), Cloudflare + 13 more | Find emails |
| roboform.com | #23,983 | Cloudflare Turnstile, Sectigo | 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 →