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 |
|---|---|---|---|
| erzap.com | #83,415 | Apache, Google Ads Conversion, Google Analytics + 8 more | Find emails |
| oster.com.br | #83,417 | Adobe Fonts (Typekit), Amazon CloudFront, Bootstrap + 17 more | Find emails |
| aurora.edu | #83,418 | Adobe Fonts (Typekit), Apache, CrazyEgg + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| ucb.com |
| #83,425 |
| Amazon CloudFront, Azure DNS, ConsentMo + 13 more |
| Find emails |
| laminatdepot.de | #83,454 | Awin, Doofinder, Google Tag Manager + 7 more | Find emails |
| cyrillus.fr | #83,462 | Adobe Fonts (Typekit), CSC (Digital Brand Services), ClickTale (Contentsquare) + 10 more | Find emails |
| footballsuper.tips | #83,478 | Cloudflare, Cloudflare edge/CDN, Font Awesome + 8 more | Find emails |
| latlong.net | #83,480 | Adapex, Cloudflare, Cloudflare Web Analytics + 13 more | Find emails |
| telecontrol.com.br | #83,482 | Amazon Route 53, Apache, Bootstrap + 12 more | Find emails |
| jochen-schweizer.de | #83,496 | Amazon CloudFront, Amazon Pay, Cloudflare edge/CDN + 9 more | Find emails |
| designinfo.in | #83,505 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 11 more | Find emails |
| nextcarehealth.com | #83,529 | AOS, Akamai Edge DNS, Apache + 12 more | Find emails |
| drsimi.cl | #83,546 | Amazon CloudFront, Cloudflare, Cloudflare edge/CDN + 7 more | Find emails |
| olay.com | #83,550 | AB Tasty, Attentive, Azure DNS + 14 more | Find emails |
| schuttevaer.nl | #83,562 | All in One SEO, Cloudflare, Cloudflare Web Analytics + 20 more | Find emails |
| ristechy.com | #83,569 | Cloudflare, Cloudflare edge/CDN, DoubleClick (Google Ads) + 11 more | Find emails |
| slitherine.com | #83,592 | Font Awesome, Let's Encrypt, Nginx + 6 more | Find emails |
| somostodosum.com.br | #83,607 | AppNexus, Bootstrap, Cloudflare + 17 more | Find emails |
| seoant.com | #83,612 | Cloudflare, Cloudflare edge/CDN, Let's Encrypt + 4 more | Find emails |
| jusoya.com | #83,623 | Bootstrap, Font Awesome, Google Analytics + 6 more | Find emails |
| sudoku-online.org | #83,635 | FlagCDN, Flaticon, Google AdSense + 10 more | Find emails |
| neemans.com | #83,638 | Adobe Fonts (Typekit), Cloudflare edge/CDN, Convert + 10 more | Find emails |
| bioraft.com | #83,642 | AWS Lambda, Amazon Route 53, Cloudflare edge/CDN + 14 more | Find emails |
| crocs.com.br | #83,662 | Amazon CloudFront, Google Tag Manager, Let's Encrypt + 5 more | Find emails |
| smtp.bz | #83,667 | Bootstrap, Chatra, Express + 12 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 25, 2026. Directional, not exhaustive — fully custom or bundled stacks under-detect. Methodology →