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features
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Description

Aster Mail is a complimentary, open-source email service that offers end-to-end encryption for users seeking genuine privacy without cumbersome technical requirements. The encryption process occurs directly on your device, ensuring that our servers never have access to your messages or any associated metadata. Utilizing the widely accepted OpenPGP standard with RSA-4096 keys, Aster ensures that you are not bound to a single provider; your keys can be used seamlessly with GPG, Thunderbird, or any compatible PGP client, and they are easily discoverable via WKD and public key servers. For communications between Aster users, the service employs a Signal-inspired X3DH and Double Ratchet protocol, providing enhanced forward secrecy. Each subscription tier comes with encrypted email capabilities, support for custom domains, free aliases, protection against trackers, and unrestricted access across both web and desktop platforms. The complete codebase is available under the AGPL v3 license on GitHub, allowing for thorough audits, and it features a public warrant canary along with a clear vulnerability disclosure policy. The free tier provides 10 GB of encrypted storage, along with 5 aliases and 1 custom domain. Paid subscriptions begin at just $2.99 per month, and all servers are conveniently located in Germany, ensuring compliance with stringent data protection regulations. Users can feel secure knowing their communications are protected by top-notch encryption standards.

Description

OpenText Core Email Encryption offers an effortless, policy-based way for organizations to safeguard confidential information shared via email. It scans outgoing messages instantly, identifying sensitive content and applying the appropriate encryption or compliance action based on predefined rules. The platform supports secure collaboration through a dedicated Secure Compose portal, enabling external partners to initiate encrypted communication without needing additional software. Its intelligent Best Method of Delivery system ensures encrypted messages reach recipients through the most compatible and secure channel available. Administrators can monitor activity through intuitive dashboards that highlight triggers, delivery methods, and compliance trends. Out-of-the-box templates simplify deployment, while flexible customization allows teams to adapt policies to evolving regulatory requirements. Because the system operates in the OpenText Secure Cloud, organizations benefit from easy setup, ongoing management, and anytime, anywhere protection. Overall, the solution minimizes risk, increases transparency, and makes enterprise-grade email security accessible across all devices and roles.

API Access

Has API No 

API Access

Has API No 

Screenshots View All

No images available

Screenshots View All

Integrations

HostBill No 
OpenText Core Email Threat Protection No 

Integrations

HostBill Yes 
OpenText Core Email Threat Protection Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version Yes 

Pricing Details

No price information available.
Free Trial No 
Free Version No 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App Yes 
iPad App Yes 
Android App Yes 
Windows Yes 
Mac Yes 
Linux Yes 
Chromebook Yes 

Deployment

Web-Based Yes 
On-Premises No 
iPhone App No 
iPad App No 
Android App No 
Windows No 
Mac No 
Linux No 
Chromebook No 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Customer Support

Business Hours No 
Live Rep (24/7) No 
Online Support Yes 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Types of Training

Training Docs Yes 
Webinars No 
Live Training (Online) No 
In Person No 

Vendor Details

Company Name

Aster Mail

Founded

2025

Country

United States

Website

astermail.org

Vendor Details

Company Name

OpenText

Founded

1991

Country

Canada

Website

cybersecurity.opentext.com/products/email-security/email-encryption/

Product Features

Email Security

Anti Spam No 
Anti Virus No 
Email Attachment Protection No 
Encryption No 
Policy Management No 
Quarantine No 
Reporting/Analytics No 
Whitelisting / Blacklisting No 

Alternatives

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