SSL Grade Leaderboard: Top 100 Websites
Scanned from 20,000 top global websites · Updated 2026-11-05
| # | Domain | Grade | Score | 30d trend | Δ | TLS | Issuer | HSTS | Expires |
|---|---|---|---|---|---|---|---|---|---|
| 1801 | kbs.co.kr | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 176 d |
| 1802 | kcet.org | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 103 d |
| 1803 | kck.st | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 88 d |
| 1804 | kcrw.com | A | 100 | — | — | TLS1.3 | Let's Encrypt | — | 0 d |
| 1805 | kdvr.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | 74 d | |
| 1806 | keenthemes.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 62 d |
| 1807 | keizai.biz | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | — | 179 d |
| 1808 | kennesaw.edu | A | 100 | — | – | TLS1.3 | InCommon Intermediate CA - OVG2C | — | 131 d |
| 1809 | kentucky.com | A | 100 | — | – | TLS1.3 | Google Trust Services | — | 62 d |
| 1810 | keukenhof.nl | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 88 d |
| 1811 | keycloak.org | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 72 d |
| 1812 | keysight.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 85 d |
| 1813 | kfor.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | 72 d | |
| 1814 | kgmedia.id | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | — | 180 d |
| 1815 | khanacademy.org | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | — | 174 d |
| 1816 | khon2.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | 72 d | |
| 1817 | kicker.de | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 147 d |
| 1818 | kidney.org | A | 100 | — | – | TLS1.3 | Let's Encrypt | 79 d | |
| 1819 | kijiji.ca | A | 100 | — | – | TLS1.3 | Google Trust Services | — | 73 d |
| 1820 | kingdraw.cn | A | 100 | — | – | TLS1.3 | Encryption Everywhere DV TLS CA - G2 | — | 73 d |
| 1821 | kingdraw.com | A | 100 | — | – | TLS1.3 | RapidSSL TLS RSA CA G1 | — | 149 d |
| 1822 | kingston.ac.uk | A | 100 | — | – | TLS1.3 | Google Trust Services | 77 d | |
| 1823 | kinja.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 63 d |
| 1824 | kino-teatr.ru | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 68 d |
| 1825 | kinopoisk.ru | A | 100 | — | – | TLS1.3 | GlobalSign GCC R46 DV TLS CA 2025 | — | 147 d |
| 1826 | kiro7.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 99 d |
| 1827 | kissmetrics.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 54 d |
| 1828 | kitco.com | A | 100 | — | – | TLS1.3 | Google Trust Services | — | 83 d |
| 1829 | kk.org | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 70 d |
| 1830 | kling.ai | A | 100 | — | – | TLS1.3 | GlobalSign GCC R46 DV TLS CA 2025 | — | 148 d |
| 1831 | klingai.com | A | 100 | — | – | TLS1.3 | GlobalSign GCC R46 DV TLS CA 2025 | — | 114 d |
| 1832 | klm.com | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA OV R36 | — | 108 d |
| 1833 | klook.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | — | 121 d |
| 1834 | knaw.nl | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 36 d |
| 1835 | kob.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | 64 d | |
| 1836 | kohler.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 70 d |
| 1837 | koin.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | 72 d | |
| 1838 | komoot.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 103 d |
| 1839 | komoot.de | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 103 d |
| 1840 | kompas.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 83 d |
| 1841 | kompasiana.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | — | 108 d |
| 1842 | kongregate.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 114 d |
| 1843 | korea.kr | A | 100 | — | – | TLS1.3 | Thawte TLS RSA CA G1 | — | 94 d |
| 1844 | korg.com | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 83 d |
| 1845 | kotlinlang.org | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 107 d |
| 1846 | kotobank.jp | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | — | 158 d |
| 1847 | kpn.com | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | — | 130 d |
| 1848 | kqed.org | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | — | 65 d |
| 1849 | krakow.pl | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 34 d |
| 1850 | krebsonsecurity.com | A | 100 | — | – | TLS1.3 | Google Trust Services | — | 62 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.