Hornetsecurity Email EncryptionHornetsecurity
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Related Products
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About
Aster Mail is a free, open-source, end-to-end encrypted email service for people who want real privacy without the technical overhead. All encryption happens on your device before anything reaches our servers, so we have zero access to your messages or metadata.
Aster uses standard OpenPGP with portable RSA-4096 keys, so you're never locked in. Your keys work with GPG, Thunderbird, or any PGP client, and they're discoverable through WKD and public keyservers. Aster-to-Aster messages use a Signal-inspired X3DH and Double Ratchet protocol for forward secrecy.
Every plan includes encrypted email, custom domain support, free aliases, tracker protection, and full access across web and desktop. The entire codebase is published under AGPL v3 on GitHub, fully auditable, with a public warrant canary and documented vulnerability disclosure.
Free plan includes 10 GB encrypted storage, 5 aliases, and 1 custom domain. Paid plans start at $2.99/month. Servers located in Germany.
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About
Business emails often contain in-house, personal, or other sensitive content that could be intercepted and accessed without authorization if inadequately protected. Ensure all-around encrypted exchange of emails with Email Encryption from Hornetsecurity for reliable, secure email communication. Outgoing emails are automatically encrypted with one of the common encryption technologies (PGP, S/MIME, or TLS), depending on the set policy and availability of the corresponding certificates, without any further user intervention. If the sender’s public key is available, their emails are automatically decrypted and delivered to the recipient. Encryption of data has become a priority because of compliance requirements. In a business environment, the exchange of sensitive files and information takes place primarily via email communication. Encryption of the transmission path is essential to protect this data.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
Privacy-conscious users
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Audience
Organizations seeking a fully automated tool to secure their email encryption processes
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and VideosNo images available
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Pricing
No information available.
Free Version
Free Trial
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Pricing
No information available.
Free Version
Free Trial
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Reviews/
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Reviews/
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationAster Mail
Founded: 2025
United States
astermail.org
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Company InformationHornetsecurity
Germany
www.hornetsecurity.com/us/services/email-encryption/
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Integrations
Microsoft 365
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