Most encrypted email services leave your subject lines and metadata exposed and unencrypted. Aster Mail encrypts everything, including subject lines, with quantum-safe ML-KEM-768 encryption. Your keys are portable and work with GPG and Thunderbird, with no vendor lock-in. Aster is open source under AGPLv3, hosted in Germany with a generous free plan. Try it free at astermail.org
Aster Mail Reviews
The community submitted 2 reviews to tell us what they like about Aster Mail, what Aster Mail can do better, and more.
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