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 |
|---|---|---|---|---|---|---|---|---|---|
| 3351 | unair.ac.id | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | — | 112 d |
| 3352 | unav.edu | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 78 d |
| 3353 | unc.edu | A | 100 | — | – | TLS1.3 | Let's Encrypt | 46 d | |
| 3354 | uncw.edu | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA OV R36 | — | 117 d |
| 3355 | undocs.org | A | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | — | 104 d |
| 3356 | unesco.de | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 44 d |
| 3357 | unhchr.ch | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 45 d |
| 3358 | uni-bielefeld.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 195 d |
| 3359 | uni-due.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 108 d | |
| 3360 | uni-erlangen.de | A | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | — | 182 d |
| 3361 | uni-freiburg.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 164 d |
| 3362 | uni-giessen.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 92 d |
| 3363 | uni-goettingen.de | A | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | — | 47 d |
| 3364 | uni-graz.at | A | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | — | 88 d |
| 3365 | uni-hamburg.de | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 58 d |
| 3366 | uni-konstanz.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 93 d |
| 3367 | uni-leipzig.de | A | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | — | 94 d |
| 3368 | uni-oldenburg.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 190 d |
| 3369 | uni-potsdam.de | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 176 d |
| 3370 | uni-sofia.bg | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | — | 184 d |
| 3371 | uniba.it | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 97 d |
| 3372 | unibuc.ro | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 28 d |
| 3373 | unicaen.fr | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 161 d |
| 3374 | unicatt.it | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 161 d |
| 3375 | unifi.it | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 95 d |
| 3376 | unige.ch | A | 100 | — | – | TLS1.3 | DigiCert EV RSA CA G2 | — | 102 d |
| 3377 | unileon.es | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 92 d |
| 3378 | union.edu | A | 100 | — | – | TLS1.3 | Let's Encrypt | 79 d | |
| 3379 | unisa.edu.au | A | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | — | 175 d |
| 3380 | united.com | A | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | — | 32 d |
| 3381 | unitn.it | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 104 d |
| 3382 | unity.com | A | 100 | — | – | TLS1.3 | DigiCert Global G3 TLS ECC SHA384 2020 CA1 | — | 63 d |
| 3383 | univ-grenoble-alpes.fr | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 182 d |
| 3384 | univ-lorraine.fr | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 148 d |
| 3385 | univ-paris13.fr | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 34 d |
| 3386 | universalis.fr | A | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | — | 90 d |
| 3387 | universiteitleiden.nl | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 92 d |
| 3388 | universityofcalifornia.edu | A | 100 | — | – | TLS1.3 | Let's Encrypt | 45 d | |
| 3389 | universityworldnews.com | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 36 d |
| 3390 | univie.ac.at | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 195 d | |
| 3391 | unl.pt | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | — | 40 d |
| 3392 | unlv.edu | A | 100 | — | – | TLS1.3 | Let's Encrypt | 62 d | |
| 3393 | uns.ac.id | A | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | — | 61 d |
| 3394 | unstoppable.ai | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 49 d |
| 3395 | unu.edu | A | 100 | — | – | TLS1.3 | Let's Encrypt | 46 d | |
| 3396 | unv.org | A | 100 | — | – | TLS1.3 | GlobalSign Atlas R46 DV TLS CA 2026 Q4 | — | 87 d |
| 3397 | uoou.cz | A | 100 | — | – | TLS1.3 | Let's Encrypt | — | 60 d |
| 3398 | uoregon.edu | A | 100 | — | – | TLS1.3 | InCommon RSA Server CA 2 | — | 151 d |
| 3399 | upatras.gr | A | 100 | — | – | TLS1.3 | HARICA Institutional TLS RSA 2 | — | 67 d |
| 3400 | upc.edu | A | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 92 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.