A
Post-quantum TLS readiness
ycombinator.com
Ready: quantum-resistant key exchange
Short answer
Yes. As of 2026-11-03, ycombinator.com negotiates the hybrid post-quantum key exchange X25519MLKEM768 over TLSv1.3 (Quantum Aether grade A).
| Grade | A |
|---|---|
| Key exchange | X25519MLKEM768 |
| Post-quantum | yes |
| TLS | TLSv1.3 |
| Hosting network | Amazon.com, Inc. |
| Tranco rank | #2157 |
From our weekly tracker of the top 10,000 sites, scanned on 2026-11-03 · /adoption
Show your readiness on your site
Markdown
[](https://ather-quatum.cloud/?domain=ycombinator.com)