CAPTCHA & Bot Protection
90,376 of the 1,000,000 top sites in our Tranco top-1M census run reCAPTCHA (9%). 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 |
|---|---|---|---|
| phidgets.com | #112,502 | Bootstrap, Google Analytics, Google Fonts + 11 more | Find emails |
| campendium.com | #112,504 | Amazon (ACM), Amazon CloudFront, AppsFlyer + 14 more | Find emails |
| hak5.org | #112,514 | Cloudflare, Cloudflare edge/CDN, ConsentMo + 7 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| mysku.club | #112,568 | Let's Encrypt, Nginx, VK + 2 more | Find emails |
| appointy.com | #112,569 | AMP for WP, ASP.NET, AddToAny + 21 more | Find emails |
| ltespace.com | #112,592 | Bootstrap, Cloudflare, JivoChat + 5 more | Find emails |
| celoscan.io | #112,593 | ASP.NET, Bootstrap, Cloudflare + 10 more | Find emails |
| christianaid.org.uk | #112,628 | Amazon CloudFront, Bootstrap, Drupal + 11 more | Find emails |
| esrtech.com | #112,642 | Cloudflare edge/CDN, Google Tag Manager, Klaviyo + 6 more | Find emails |
| balifiber.id | #112,643 | AOS, AddThis, Cloudflare + 11 more | Find emails |
| joplinglobe.com | #112,689 | Font Awesome, Google Fonts, Google Tag Manager + 6 more | Find emails |
| ecoatm.com | #112,694 | Amazon Route 53, Cloudflare edge/CDN, Datadog + 12 more | Find emails |
| inten.pl | #112,695 | Google Analytics, Google Tag Manager, Meta Pixel + 4 more | Find emails |
| sleep.org | #112,696 | Cloudflare edge/CDN, DebugBear, Google Ads Conversion + 12 more | Find emails |
| betflare.net.gr | #112,734 | Cloudflare, Cloudflare Web Analytics, Cloudflare edge/CDN + 5 more | Find emails |
| riscocloud.com | #112,737 | Cloudflare edge/CDN, Fancybox, Font Awesome + 8 more | Find emails |
| blockstream.com | #112,751 | Adobe Fonts (Typekit), Ashby, Axios + 20 more | Find emails |
| career-tasu.jp | #112,758 | Adobe Experience Cloud (Launch), Amazon CloudFront, Apache + 5 more | Find emails |
| apra.gov.au | #112,759 | ConsentMo, Drupal, Fastly + 3 more | Find emails |
| bluemercury.com | #112,761 | Adobe Experience Cloud (Launch), Adobe Target, Bazaarvoice + 9 more | Find emails |
| ryderwear.com | #112,797 | Amazon Advertising, Amazon Route 53, Cloudflare edge/CDN + 12 more | Find emails |
| fastmetrics.com | #112,808 | Apache, Bootstrap, Brandfolder + 5 more | Find emails |
| restaurantdepot.com | #112,812 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 8 more | Find emails |
| papersource.com | #112,828 | Adobe Fonts (Typekit), Cloudflare, Cloudflare edge/CDN + 9 more | Find emails |
| triple-a.io | #112,847 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 10 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-2026-08-24-full), snapshot August 24, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →