SSL Grade Leaderboard: Top 100 Websites
Scanned from 20,000 top global websites · Updated 2026-11-08
| # | Domain | Grade | Score | 30d trend | Δ | TLS | Issuer | HSTS | Expires |
|---|---|---|---|---|---|---|---|---|---|
| 10551 | smartedu.cn | A | 93 | — | – | TLS1.2 | SHECA OV TLS RSA CA A1 | 45 d | |
| 10552 | smu.edu | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA OV E36 | 37 d | |
| 10553 | spaceweather.gov | A | 93 | — | – | TLS1.2 | Let's Encrypt | 28 d | |
| 10554 | stanford.edu | A | 93 | TLS1.2 | InCommon Intermediate CA - DVG2C | 188 d | |||
| 10555 | stepchange.org | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA DV R36 | 107 d | |
| 10556 | streetdirectory.com | A | 93 | — | — | TLS1.2 | Let's Encrypt | — | 15 d |
| 10557 | sudrf.ru | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 31 d |
| 10558 | surrey.ac.uk | A | 93 | — | – | TLS1.2 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 138 d | |
| 10559 | taiwan.net.tw | A | 93 | — | – | TLS1.2 | TWCA SSL Certification Authority | — | 40 d |
| 10560 | takaratomy.co.jp | A | 93 | — | – | TLS1.2 | SECOM Passport for Web OV RSA CA 2024 | — | 28 d |
| 10561 | taplink.cc | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 85 d |
| 10562 | taplink.ws | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 85 d |
| 10563 | tenantnetworks.com | A | 93 | — | – | TLS1.2 | GoDaddy TLS Intermediate CA DV - R1v1 | 135 d | |
| 10564 | teradata.com | A | 93 | — | – | TLS1.2 | Entrust OV TLS Issuing RSA CA 2 | — | 38 d |
| 10565 | toledoblade.com | A | 93 | — | – | TLS1.2 | GoDaddy TLS Intermediate CA DV - R1v1 | — | 48 d |
| 10566 | tool.lu | A | 93 | — | – | TLS1.2 | Certum DV TLS G2 R39 CA | 94 d | |
| 10567 | tuc.org.uk | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 40 d |
| 10568 | tupalo.com | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 36 d |
| 10569 | tvp.info | A | 93 | — | – | TLS1.2 | Certum DV TLS G2 R39 CA | — | 42 d |
| 10570 | tvp.pl | A | 93 | — | – | TLS1.2 | Certum DV TLS G2 R39 CA | — | 62 d |
| 10571 | uanl.mx | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA DV R36 | 61 d | |
| 10572 | uc.edu | A | 93 | — | – | TLS1.2 | InCommon Intermediate CA - OVG2C | 161 d | |
| 10573 | ucl.ac.uk | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA EV R36 | — | 175 d |
| 10574 | ucoz.com | A | 93 | — | – | TLS1.2 | GoGetSSL RSA DV SSL CA 2 | — | 130 d |
| 10575 | ucoz.org | A | 93 | — | – | TLS1.2 | GoGetSSL RSA DV CA | — | 139 d |
| 10576 | ucsd.edu | A | 93 | — | – | TLS1.2 | InCommon RSA Server CA 2 | 155 d | |
| 10577 | uem.br | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 65 d |
| 10578 | uhc.com | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA OV R36 | — | 147 d |
| 10579 | uic.edu | A | 93 | — | – | TLS1.2 | InCommon RSA OV SSL CA 3 | — | 53 d |
| 10580 | umontreal.ca | A | 93 | — | – | TLS1.2 | Entrust OV TLS Issuing RSA CA 2 | — | 113 d |
| 10581 | uncg.edu | A | 93 | — | – | TLS1.2 | InCommon RSA OV SSL CA 3 | 38 d | |
| 10582 | undip.ac.id | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA OV R36 | 127 d | |
| 10583 | unesco.org | A | 93 | – | TLS1.2 | Let's Encrypt | — | 54 d | |
| 10584 | uniba.sk | A | 93 | — | – | TLS1.2 | GEANT TLS RSA 1 | — | 91 d |
| 10585 | united24media.com | A | 93 | — | – | TLS1.2 | GoGetSSL RSA DV CA | 39 d | |
| 10586 | universite-paris-saclay.fr | A | 93 | — | – | TLS1.2 | GEANT TLS RSA 1 | — | 96 d |
| 10587 | unm.edu | A | 93 | — | – | TLS1.2 | InCommon Intermediate CA - OVG2C | — | 90 d |
| 10588 | unmsm.edu.pe | A | 93 | — | — | TLS1.2 | Let's Encrypt | 7 d | |
| 10589 | unpad.ac.id | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA DV R36 | — | 47 d |
| 10590 | uoguelph.ca | A | 93 | — | – | TLS1.2 | Let's Encrypt | — | 53 d |
| 10591 | uqac.ca | A | 93 | — | – | TLS1.2 | Entrust OV TLS Issuing RSA CA 2 | — | 146 d |
| 10592 | usf.edu | A | 93 | — | – | TLS1.2 | InCommon RSA OV SSL CA 3 | — | 40 d |
| 10593 | usps.com | A | 93 | — | – | TLS1.2 | Sectigo Public Server Authentication CA OV R36 | 138 d | |
| 10594 | uta.edu | A | 93 | — | – | TLS1.2 | InCommon RSA Server CA 2 | 38 d | |
| 10595 | utep.edu | A | 93 | — | – | TLS1.2 | InCommon Intermediate CA - OVG2C | 190 d | |
| 10596 | utmb.edu | A | 93 | — | – | TLS1.2 | InCommon RSA OV SSL CA 3 | 83 d | |
| 10597 | utsa.edu | A | 93 | — | – | TLS1.2 | InCommon Intermediate CA - OVG2C | — | 174 d |
| 10598 | utsouthwestern.edu | A | 93 | — | — | TLS1.2 | InCommon RSA OV SSL CA 3 | 15 d | |
| 10599 | victorinox.com | A | 93 | — | – | TLS1.2 | Let's Encrypt | 36 d | |
| 10600 | virginmoney.com | A | 93 | — | – | TLS1.2 | Entrust OV TLS Issuing RSA CA 2 | — | 118 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.