SSL Grade Leaderboard: Top 100 Websites
Scanned from 20,000 top global websites · Updated 2026-11-07
| # | Domain | Grade | Score | 30d trend | Δ | TLS | Issuer | HSTS | Expires |
|---|---|---|---|---|---|---|---|---|---|
| 5251 | kennedy-center.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 69 d | |
| 5252 | kens5.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 40 d | |
| 5253 | ketv.com | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R46 DV TLS CA 2026 Q3 | 128 d | |
| 5254 | kfw.de | A+ | 100 | — | – | TLS1.3 | Telekom Security OV RSA CA 26A | 132 d | |
| 5255 | kgw.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 31 d | |
| 5256 | khm.at | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 124 d | |
| 5257 | khou.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 32 d | |
| 5258 | ki.se | A+ | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 196 d | |
| 5259 | king5.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 30 d | |
| 5260 | kiplinger.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 29 d | |
| 5261 | kit.edu | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 83 d | |
| 5262 | kiwa.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 66 d | |
| 5263 | kk.dk | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 44 d | |
| 5264 | klarna.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 140 d | |
| 5265 | klaviyo.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 101 d | |
| 5266 | kleinanzeigen.de | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 195 d | |
| 5267 | kleinezeitung.at | A+ | 100 | — | – | TLS1.3 | RapidSSL TLS RSA CA G1 | 64 d | |
| 5268 | kmbc.com | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R46 DV TLS CA 2026 Q3 | 128 d | |
| 5269 | kmk.org | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 65 d | |
| 5270 | knmi.nl | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 94 d | |
| 5271 | knowbe4.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 152 d | |
| 5272 | knoxnews.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 80 d | |
| 5273 | kobe-np.co.jp | A+ | 100 | — | – | TLS1.3 | GlobalSign RSA OV SSL CA 2018 | 137 d | |
| 5274 | koco.com | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R46 DV TLS CA 2026 Q3 | 128 d | |
| 5275 | kodansha.co.jp | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 63 d | |
| 5276 | kohls.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G3 TLS ECC SHA384 2020 CA1 | 155 d | |
| 5277 | kommersant.ru | A+ | 100 | — | – | TLS1.3 | GlobalSign RSA OV SSL CA 2018 | 142 d | |
| 5278 | komonews.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 77 d | |
| 5279 | konmari.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 78 d | |
| 5280 | konsumentverket.se | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 147 d | |
| 5281 | korea.ac.kr | A+ | 100 | — | – | TLS1.3 | GlobalSign GCC R3 DV TLS CA 2020 | 141 d | |
| 5282 | koreanair.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 190 d | |
| 5283 | kpbs.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 80 d | |
| 5284 | kpmg.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G3 TLS ECC SHA384 2020 CA1 | 181 d | |
| 5285 | kraftheinz.com | A+ | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA OV R36 | 32 d | |
| 5286 | krita.org | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 60 d | |
| 5287 | kro-ncrv.nl | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 80 d | |
| 5288 | ksdk.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 84 d | |
| 5289 | kshb.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 116 d | |
| 5290 | kth.se | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 112 d | |
| 5291 | ktm.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 141 d | |
| 5292 | ktnv.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 116 d | |
| 5293 | ktvb.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 33 d | |
| 5294 | ktvz.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 83 d | |
| 5295 | ku.ac.th | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 41 d | |
| 5296 | kucoin.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 61 d | |
| 5297 | kuehne-nagel.com | A+ | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | 60 d | |
| 5298 | kumu.io | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 77 d | |
| 5299 | kutv.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 77 d | |
| 5300 | kvk.nl | A+ | 100 | — | – | TLS1.3 | DigiCert G2 TLS EU RSA4096 SHA384 2022 CA1 | 147 d |
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FAQ
How often is the SSL leaderboard updated?
Watched domains are scanned daily; the top-20K leaderboard refreshes full snapshots every Sunday.
How is the SSL grade calculated?
Protocol versions, cipher strength, certificate validity, HSTS and OCSP stapling are weighted into a 0-100 score, mapped to grades from A+ to F.
What does an A+ SSL rating mean?
A near-perfect TLS setup: TLS 1.3 enabled, strong cipher suites, full forward secrecy (PFS) and correctly deployed HSTS.
Methodology
CertH grades each domain via pure TLS handshakes (no server access required): certificate validity, key strength, protocol versions, HSTS and OCSP stapling are scored with a deduction model (100 minus itemized penalties) into a 0-100 score mapped to six grades from A+ to F. Daily snapshots accumulate into an auditable health trend.
What is an SSL grade?
An SSL grade (A+ through F) evaluates a website's overall TLS configuration: protocol versions, cipher strength, certificate validity and trust chain, HSTS and OCSP stapling. A higher grade means stronger resistance to man-in-the-middle attacks and data breaches.
Why track certificate health over time?
Expired certificates, CA switches and configuration regressions can silently drag a grade down. CertH daily snapshots record those changes so you can spot risk before failures, with auditable history as evidence.