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 |
|---|---|---|---|
| linktw.in | #109,668 | Bootstrap, Cloudflare, Cloudflare edge/CDN + 13 more | Find emails |
| classihub.in | #109,688 | Cloudflare, Cloudflare Turnstile, Cloudflare Web Analytics + 17 more | Find emails |
| adquint.com | #109,695 | Bootstrap, Express, Font Awesome + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| warpline.com | #109,754 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 6 more | Find emails |
| eastriding.gov.uk | #109,770 | Bootstrap, Font Awesome, Google Tag Manager + 11 more | Find emails |
| widencollective.com | #109,785 | Adyen, Amazon Route 53, Brightcove + 17 more | Find emails |
| sermilitar.store | #109,870 | Cloudflare edge/CDN, Let's Encrypt, Shopify + 3 more | Find emails |
| nanpuu.jp | #109,897 | Apache, Fancybox, Google Analytics + 8 more | Find emails |
| redmagic.com | #109,905 | Cloudflare edge/CDN, ConsentMo, Google Fonts + 13 more | Find emails |
| ammoseek.com | #109,913 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 11 more | Find emails |
| uteq.edu.ec | #109,931 | Font Awesome, Google Analytics, Google Maps + 10 more | Find emails |
| citenet.net | #109,946 | Apache, DigiCert, Font Awesome + 8 more | Find emails |
| silverlinesolutions.com | #109,975 | ASP.NET, Font Awesome, Let's Encrypt + 6 more | Find emails |
| smart-stb.net | #109,992 | CookieYes, Google Analytics, Google Tag Manager + 9 more | Find emails |
| ember-climate.org | #109,993 | Cloudflare, Cloudflare edge/CDN, Google Tag Manager + 7 more | Find emails |
| order.store | #110,003 | Adobe Audience Manager, Amazon Advertising, Arkose Labs + 28 more | Find emails |
| saltandstone.com | #110,006 | Cloudflare edge/CDN, Google Workspace, Let's Encrypt + 7 more | Find emails |
| butcherbox.com | #110,033 | Azure DNS, Cloudflare edge/CDN, Google Tag Manager + 6 more | Find emails |
| autointel.ai | #110,043 | AWS Lambda, Auth0, Cloudflare edge/CDN + 10 more | Find emails |
| ghs.com | #110,049 | Adobe Fonts (Typekit), Amazon Route 53, Apache + 9 more | Find emails |
| batcon.org | #110,062 | Bluesky, Bunny Fonts, Cloudflare + 13 more | Find emails |
| seniorsdiscountclub.com.au | #110,076 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 12 more | Find emails |
| ssm.fun | #110,079 | Cloudflare, ExoClick, Font Awesome + 6 more | Find emails |
| getcubo.com | #110,087 | Afterpay, Amazon Route 53, Cloudflare edge/CDN + 13 more | Find emails |
| usite.pro | #110,116 | Bootstrap, CleanTalk, Font Awesome + 8 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 →