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 |
|---|---|---|---|---|---|---|---|---|---|
| 6701 | unixtools.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 42 d | |
| 6702 | unocha.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 185 d | |
| 6703 | unodc.org | A+ | 100 | — | – | TLS1.3 | GlobalSign RSA OV SSL CA 2018 | 68 d | |
| 6704 | unomaha.edu | A+ | 100 | — | – | TLS1.3 | InCommon Intermediate CA - DVG2C | 180 d | |
| 6705 | unoosa.org | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 32 d | |
| 6706 | unr.edu | A+ | 100 | — | – | TLS1.3 | InCommon Intermediate CA - OVG2C | 147 d | |
| 6707 | unrealengine.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 137 d | |
| 6708 | unstoppabledomains.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 60 d | |
| 6709 | unsw.edu.au | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 86 d | |
| 6710 | unwomen.org | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 58 d | |
| 6711 | uokik.gov.pl | A+ | 100 | — | – | TLS1.3 | Certum DV TLS G2 R39 CA | 75 d | |
| 6712 | uol.de | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 171 d | |
| 6713 | uoou.gov.cz | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 60 d | |
| 6714 | uottawa.ca | A+ | 100 | — | – | TLS1.3 | DigiCert Global G3 TLS ECC SHA384 2020 CA1 | 92 d | |
| 6715 | up.pt | A+ | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 183 d | |
| 6716 | upf.edu | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 68 d | |
| 6717 | uplandsoftware.com | A+ | 100 | — | – | TLS1.3 | Starfield TLS Intermediate CA DV - R1v1 | 69 d | |
| 6718 | upm.es | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 175 d | |
| 6719 | upmc.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 110 d | |
| 6720 | ups.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 183 d | |
| 6721 | uptodate.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 118 d | |
| 6722 | ura.news | A+ | 100 | — | – | TLS1.3 | GlobalSign GCC R46 OV TLS CA 2025 | 103 d | |
| 6723 | urv.cat | A+ | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 188 d | |
| 6724 | usa.gov | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 59 d | |
| 6725 | usaa.com | A+ | 100 | — | – | TLS1.3 | DigiCert EV RSA CA G2 | 168 d | |
| 6726 | usatoday.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 53 d | |
| 6727 | uscis.gov | A+ | 100 | — | – | TLS1.3 | DigiCert Global G3 TLS ECC SHA384 2020 CA1 | 94 d | |
| 6728 | usga.org | A+ | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | 81 d | |
| 6729 | usherbrooke.ca | A+ | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA EV R36 | 117 d | |
| 6730 | usitc.gov | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 68 d | |
| 6731 | usna.edu | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 49 d | |
| 6732 | usnews.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 73 d | |
| 6733 | usp.org | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 190 d | |
| 6734 | uspreventiveservicestaskforce.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 122 d | |
| 6735 | ussoccer.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 91 d | |
| 6736 | usta.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 66 d | |
| 6737 | ustc.edu.cn | A+ | 100 | — | – | TLS1.3 | ZeroSSL RSA DV SSL CA 2 | 80 d | |
| 6738 | ustr.gov | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 97 d | |
| 6739 | uswitch.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 38 d | |
| 6740 | utah.com | A+ | 100 | — | – | TLS1.3 | Google Trust Services | 58 d | |
| 6741 | utm.my | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 72 d | |
| 6742 | utoronto.ca | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 74 d | |
| 6743 | utorrent.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 28 d | |
| 6744 | uts.edu.au | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 76 d | |
| 6745 | utu.fi | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 92 d | |
| 6746 | utwente.nl | A+ | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 140 d | |
| 6747 | uu.nl | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 139 d | |
| 6748 | uvic.ca | A+ | 100 | — | – | TLS1.3 | GlobalSign RSA OV SSL CA 2018 | 45 d | |
| 6749 | uwe.ac.uk | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 59 d | |
| 6750 | uwv.nl | A+ | 100 | — | – | TLS1.3 | DigiCert G2 TLS EU RSA4096 SHA384 2022 CA1 | 77 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.