Aster Mail

What it does

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: free, end-to-end encrypted email with post-quantum security. Mail you write is encrypted on your device, and we never hold your keys.

Take back your inbox. End-to-end encrypted email, hosted in Germany, with 10 GB free forever and no ads, scanning, or AI ever. Free forever, no credit card required. Paid plans from $2.99/mo with a 30-day money-back guarantee. Move years of mail from Gmail, Outlook, Yahoo, or any IMAP account in a single click, and we will pull everything across in the background while you keep working, with nothing left behind and nothing lost in the move. With QuickSwitch, it takes two clicks to import all your emails from any provider, so you don't lose any time switching. Claim your address No personal information required and completely free, just claim your address and you're good to go. Migrate…from astermail.org

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