Hannover-based end-to-end encrypted email and calendar; quantum-resistant encryption roadmap.
A curated list of cybersecurity vendors headquartered in the European Union, in the Email security category. A sovereign alternative to foreign email security gateways.
6 vendors listed · 1 matching filters · last reviewed June 2026
Hannover-based end-to-end encrypted email and calendar; quantum-resistant encryption roadmap.
If you run or know an EU-headquartered Email security vendor that should be here, email hello@ciphercue.com with the name and HQ country.