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 |
|---|---|---|---|
| amainhobbies.com | #40,140 | ASP.NET, Cloudflare, Cloudflare edge/CDN + 2 more | Find emails |
| getmetrical.com | #40,156 | Cloudflare, Cloudflare Turnstile, Cloudflare edge/CDN + 6 more | Find emails |
| domainparking.ru | #40,157 | Bootstrap, Fancybox, Font Awesome + 10 more | Find emails |
| #184 (Tranco) |
| Find emails |
| 5 | taboola.com | #187 (Tranco) | Find emails |
| multivu.com | #40,160 | Bootstrap, Cloudflare, Cloudflare Bot Management + 11 more | Find emails |
| dotter.me | #40,175 | AWS Lambda, Adobe Fonts (Typekit), Amazon Route 53 + 11 more | Find emails |
| theoi.com | #40,201 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 9 more | Find emails |
| tarhelypark.hu | #40,216 | Apache, Bootstrap, DigiCert + 13 more | Find emails |
| levels.fyi | #40,228 | Amazon (ACM), Amazon CloudFront, Cloudflare + 4 more | Find emails |
| texags.com | #40,235 | ASP.NET, Authorize.net, Azure DNS + 8 more | Find emails |
| bluemountain.com | #40,241 | Akamai edge/CDN, Akamai mPulse, Amazon Route 53 + 11 more | Find emails |
| tangiblee.com | #40,242 | AWS Lambda, Cloudflare edge/CDN, Google Analytics + 7 more | Find emails |
| richelieu.com | #40,257 | Font Awesome, Google Tag Manager, Let's Encrypt + 5 more | Find emails |
| snapfish.co.uk | #40,268 | Adobe Experience Cloud (Launch), Akamai edge/CDN, Akamai mPulse + 10 more | Find emails |
| zumvu.com | #40,275 | Bootstrap, Font Awesome, Google Analytics + 12 more | Find emails |
| lpo.fr | #40,278 | Bootstrap, Cloudflare edge/CDN, Fancybox + 9 more | Find emails |
| daveandbusters.com | #40,283 | AOS, Adobe Experience Cloud (Launch), Bootstrap + 13 more | Find emails |
| eventive.org | #40,296 | Atlassian Statuspage, Cloudflare, Cloudflare Bot Management + 14 more | Find emails |
| uzex.uz | #40,301 | ASP.NET, Bootstrap, DigiCert + 12 more | Find emails |
| eversource.com | #40,304 | ASP.NET, Adobe Experience Cloud (Launch), Akamai Edge DNS + 15 more | Find emails |
| delhaize.be | #40,316 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Apache + 12 more | Find emails |
| omg.org | #40,342 | Bootstrap, Cloudflare, Cloudflare Web Analytics + 18 more | Find emails |
| party.biz | #40,350 | Apache, Bootstrap, Font Awesome + 9 more | Find emails |
| theordinary.com | #40,356 | Bazaarvoice, Bootstrap, Cloudflare edge/CDN + 9 more | Find emails |
| dnainfo.com | #40,358 | DoubleClick (Google Ads), Google Analytics, Google Publisher Tag + 11 more | Find emails |
| dotroll.com | #40,362 | Better Uptime, Bootstrap, Cloudflare + 24 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 →