A
Post-quantum TLS readiness
threema.ch
Ready: quantum-resistant key exchange
Short answer
Yes. As of 2026-11-03, threema.ch 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 | Nine Internet Solutions AG |
| Tranco rank | #1071 |
| Country | 🇨🇭 Switzerland: #12/26 (54.5%) |
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=threema.ch)