SSL/TLS Certificates
33,361 of the 1,000,000 top sites in our Tranco top-1M census run Sectigo (3.3%). A certificate authority that issues SSL/TLS certificates used to secure websites with HTTPS. Detection is homepage-level HTML/header fingerprinting, so a site can run Sectigo on other pages without it showing here.
Other ssl/tls certificates
| # | Domain | Global traffic rank | Contacts |
|---|---|---|---|
| 1 | github.com | #29 (Tranco) | Find emails |
| 2 | roblox.com | #73 (Tranco) | Find emails |
| 3 | nginx.com | #95 (Tranco) | Find emails |
| 4 | f5.com |
| Site | Tranco rank | Also detected | Contacts |
|---|---|---|---|
| iubenda.com | #2,037 | Amazon Route 53, Bunny CDN, BunnyCDN + 2 more | Find emails |
| e-volution.ai | #2,057 | Amazon Route 53, Apache | Find emails |
| orcid.org | #2,082 | Cloudflare, Cloudflare Bot Management, Cloudflare edge/CDN + 2 more | Find emails |
| #150 (Tranco) |
| Find emails |
| 5 | avast.com | #202 (Tranco) | Find emails |
| globalpaymentsinc.com |
| #2,088 |
| Cloudflare Bot Management, Cloudflare Turnstile, Cloudflare edge/CDN |
| Find emails |
| timeanddate.com | #2,140 | Cloudflare Bot Management, Cloudflare edge/CDN, NS1 | Find emails |
| trellix.com | #2,161 | Adobe Experience Cloud (Launch), Akamai Bot Manager, Akamai edge/CDN + 26 more | Find emails |
| algolia.net | #2,181 | NS1, Nginx | Find emails |
| proofpoint.com | #2,185 | Amazon CloudFront, Amazon S3, DoubleClick (Google Ads) + 7 more | Find emails |
| threema.ch | #2,186 | Ionic Framework, Nginx, Alpine.js | Find emails |
| adsco.re | #2,195 | Microsoft 365 | Find emails |
| norton.com | #2,246 | Akamai edge/CDN, Microsoft 365, Adobe Experience Manager | Find emails |
| smh.com.au | #2,251 | Amazon Route 53, DoubleClick (Google Ads), Fastly + 5 more | Find emails |
| nodejs.org | #2,319 | Cloudflare, Cloudflare edge/CDN, Google Fonts + 4 more | Find emails |
| kde.org | #2,329 | Apache, Bluesky, Matomo | Find emails |
| last.fm | #2,388 | Amazon Advertising, Blockthrough, Bluesky + 12 more | Find emails |
| ey.com | #2,433 | Adobe Experience Cloud (Launch), Azure Front Door, Fastly + 4 more | Find emails |
| dondominio.com | #2,444 | Apache, PHP | Find emails |
| buzzoola.com | #2,466 | Google Fonts, Google Tag Manager, Nginx + 1 more | Find emails |
| ionos.de | #2,493 | Apache, Kameleoon, Next.js + 2 more | Find emails |
| scmp.com | #2,500 | Adobe Fonts, Adobe Fonts (Typekit), Amazon Advertising + 17 more | Find emails |
| su89-cdn.net | #2,509 | Amazon Route 53, Google Analytics, Google Fonts + 5 more | Find emails |
| webrootcloudav.com | #2,524 | Amazon Route 53, Google Tag Manager, Imperva + 4 more | Find emails |
| afraid.org | #2,527 | Nginx | Find emails |
| entrust.net | #2,550 | Akamai Edge DNS, Cloudflare Bot Management, Cloudflare Turnstile + 1 more | Find emails |
| urldefense.com | #2,565 | Amazon Route 53 | 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 →