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 |
|---|---|---|---|---|---|---|---|---|---|
| 4401 | coschedule.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 69 d | |
| 4402 | cosmopolitan.com | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R46 DV TLS CA 2026 Q4 | 196 d | |
| 4403 | coub.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 64 d | |
| 4404 | couchsurfing.com | A+ | 100 | — | – | TLS1.3 | Google Trust Services | 43 d | |
| 4405 | countryliving.com | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R46 DV TLS CA 2026 Q4 | 196 d | |
| 4406 | coupang.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 74 d | |
| 4407 | courier-journal.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 86 d | |
| 4408 | couriermail.com.au | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 112 d | |
| 4409 | coursera.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 122 d | |
| 4410 | cox.com | A+ | 100 | — | – | TLS1.3 | DigiCert EV RSA CA G2 | 107 d | |
| 4411 | coze.cn | A+ | 100 | — | – | TLS1.3 | RapidSSL TLS RSA CA G1 | 71 d | |
| 4412 | cpan.org | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 49 d | |
| 4413 | crateandbarrel.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 55 d | |
| 4414 | crates.io | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R3 DV TLS CA 2025 Q4 | 102 d | |
| 4415 | creately.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 58 d | |
| 4416 | creativebloq.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 79 d | |
| 4417 | creativelive.com | A+ | 100 | — | – | TLS1.3 | Google Trust Services | 69 d | |
| 4418 | crestron.com | A+ | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA OV R36 | 28 d | |
| 4419 | croatia.hr | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 175 d | |
| 4420 | crocs.com | A+ | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | 172 d | |
| 4421 | crowdin.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 152 d | |
| 4422 | crowneplaza.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G3 TLS ECC SHA384 2020 CA1 | 145 d | |
| 4423 | cruisecritic.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 78 d | |
| 4424 | cryoutcreations.eu | A+ | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | 187 d | |
| 4425 | csic.es | A+ | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 154 d | |
| 4426 | csmonitor.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 127 d | |
| 4427 | csulb.edu | A+ | 100 | — | – | TLS1.3 | InCommon Intermediate CA - DVG2C | 107 d | |
| 4428 | csusb.edu | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 37 d | |
| 4429 | csusm.edu | A+ | 100 | — | – | TLS1.3 | InCommon RSA Server CA 2 | 98 d | |
| 4430 | ctmirror.org | A+ | 100 | — | – | TLS1.3 | Google Trust Services | 79 d | |
| 4431 | cuatro.com | A+ | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | 104 d | |
| 4432 | cuni.cz | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 114 d | |
| 4433 | curator.io | A+ | 100 | — | – | TLS1.3 | ZeroSSL ECC DV SSL CA 2 | 46 d | |
| 4434 | curbed.com | A+ | 100 | — | – | TLS1.3 | GlobalSign Atlas R3 DV TLS CA 2026 Q2 | 51 d | |
| 4435 | curl.se | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 56 d | |
| 4436 | cursor.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 80 d | |
| 4437 | cutt.ly | A+ | 100 | — | – | TLS1.3 | GeoTrust TLS RSA CA G1 | 158 d | |
| 4438 | cve.org | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M01 | 138 d | |
| 4439 | cvent.me | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 56 d | |
| 4440 | cvs.com | A+ | 100 | — | – | TLS1.3 | DigiCert Global G2 TLS RSA SHA256 2020 CA1 | 133 d | |
| 4441 | cwi.nl | A+ | 100 | — | – | TLS1.3 | GEANT TLS ECC 1 | 93 d | |
| 4442 | cyberduck.io | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 53 d | |
| 4443 | cyberfolks.pl | A+ | 100 | — | – | TLS1.3 | DigiCert EV RSA CA G2 | 74 d | |
| 4444 | cycling74.com | A+ | 100 | — | – | TLS1.3 | Sectigo Public Server Authentication CA DV R36 | 143 d | |
| 4445 | cyclingnews.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 77 d | |
| 4446 | cyclingweekly.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 86 d | |
| 4447 | cygwin.com | A+ | 100 | — | – | TLS1.3 | Let's Encrypt | 33 d | |
| 4448 | dagstuhl.de | A+ | 100 | — | – | TLS1.3 | GEANT TLS RSA 1 | 92 d | |
| 4449 | dailygazette.com | A+ | 100 | — | – | TLS1.3 | Google Trust Services | 49 d | |
| 4450 | dailyhive.com | A+ | 100 | — | – | TLS1.3 | Amazon RSA 2048 M04 | 155 d |
Track grade changes for your domains
Sign up free, watch your domains and get alerted the moment a grade drops.
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.