Audience

Privacy-conscious users

About Aster Mail

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.

Other Popular Alternatives & Related Software
CounterMail
CounterMail
CounterMail is a secure and easy to use online email service, designed to provide maximum security and privacy without any unnecessary complexity. You can access your email account at any time, from anywhere in the world. Your account will always be encrypted and anonymous. CounterMail's encryption works automatically and transparently, it requires no specialized computer skills or knowledge. If you are comfortable using services like Hotmail or Gmail, you will be comfortable using CounterMail's secure email! We are using a strong encryption protocol called OpenPGP, with 4096 bits encryption keys to protect your data. To the best of publicly available information, there is no known method which will allow a person or group to break OpenPGP:s encryption by cryptographic or computational means.
Learn more
Atomic Mail
Atomic Mail
(5 Ratings)
Atomic Mail is a secure and user-centric email hosting provider, dedicated to offering privacy-first email services. With features such as alias creation, robust security measures, and seamless account recovery, AtomicMail ensures your email experience is both private and hassle-free. Creation of Aliases (Hide-my-email): Maintain your privacy by creating multiple email aliases; Spam Free, No Ads; Email Password Protection; End-to-End Encryption: only you and your intended recipient can read the message; Zero Access Encryption: Atomic Mail cannot access your emails; Account Recovery with Seed Phrase: Recover access to your account with a unique seed phrase. Can regain control of your email account without compromising security.
Learn more
Proton Mail
Proton Mail
(11 Ratings)
Proton Mail is the simplest way to protect your communications with built-in end-to-end encryption. Prevent data breaches, stay compliant with regulations like GDPR and HIPAA, and earn client trust. Protected by Swiss privacy laws and trusted by over 50,000 businesses, Proton Mail keeps your business data confidential and under your control. With Proton Mail and Calendar, your team can securely manage their inbox and schedule, while your organization maintains a professional presence with support for custom email domains and personalized branding. And with the Easy Switch tool, migrating from Google or Microsoft is seamless, no IT expertise required.
Learn more
Microsoft 365
Microsoft 365
(102 Ratings)
Microsoft 365 is a cloud-based productivity platform that combines familiar tools like Word, Excel, PowerPoint, Outlook, and Teams into one integrated solution. With the addition of Microsoft 365 Copilot, AI capabilities are built directly into these applications to enhance productivity and streamline everyday tasks. Users can draft documents, analyze data, create presentations, and manage emails more efficiently with intelligent assistance. The platform allows seamless collaboration across teams by enabling real-time editing, file sharing, and communication. Microsoft 365 also includes cloud storage through OneDrive, ensuring users can access their files from anywhere. Copilot helps users generate content, summarize information, and provide insights based on their data. The system is designed to support both personal and professional workflows with flexibility across desktop, web, and mobile devices.
Learn more

Pricing

Free Version:
Free Version available.

Integrations

No integrations listed.

Ratings/Reviews

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Company Information

Aster Mail
Founded: 2025
United States
astermail.org

Videos and Screen Captures

Get Started
Other Useful Business Software
$300 Free Credits for Your Google Cloud Projects Icon
$300 Free Credits for Your Google Cloud Projects

Start building on Google Cloud with $300 in free credits. No commitment, no credit card required until you're ready to scale.

Launch your next project with $300 in free Google Cloud credits—no strings attached. Test, build, and deploy without risk. Use your credits across the entire Google Cloud platform to find what works best for your needs. After your credits are used, continue with always-free tier services. Only pay when you're ready to scale. Sign up in minutes and start exploring.
Start Free Trial

Product Details

Platforms Supported
Cloud
Windows
Mac
Linux
iPhone
iPad
Android
Chromebook
Training
Documentation
Videos
Support
Online

Aster Mail Frequently Asked Questions

Q: What kinds of users and organization types does Aster Mail work with?
Q: What languages does Aster Mail support in their product?
Q: What kind of support options does Aster Mail offer?
Q: Does Aster Mail have a mobile app?
Q: What type of training does Aster Mail provide?

Aster Mail Product Features

Page Already Claimed. Claim Again?