6 best email encryption software [2021 Guide]

Radu Tyrsina
by Radu Tyrsina
CEO & Founder
Radu Tyrsina has been a Windows fan ever since he got his first PC, a Pentium III (a monster at that time). For most of the kids of his age, the Internet was an... Read more
Affiliate Disclosure
  • Digital correspondence has never been more endangered since data loss and sensitive information leakage via email are more and more likely to impact users.
  • Get the best email encryption software to secure your messages.
  • When it comes to keeping your data safe, no effort is too big. Check out these Best Email Backup Tools.
  • Explore our Security & Privacy Hub as well.
encrypted email software

These days, the majority of today’s correspondence is carried out through email.

At the same time, this can also attract a potential threat to the users’ privacy and security. Data loss and sensitive information leakage via email are some of the most pressing concerns for most users and especially businesses.

Hence, confidentiality and confidence are vital factors for organizations and typical users alike. This is were email encryption enters the scene.

At this point, the importance of mail encryption is undeniable, and fortunately, the market is filled with open source privacy software that can provide it.

Here are 6 best email encryptionsoftware tools along with their set of features and advantages.

What is the best encrypted email service?


ProtonMail is a great service that can encrypt your emails. This email provider is located in Switzerland and therefore it has to comply with strict Swiss privacy laws.

The service offers end-to-end encryption, meaning that only you and your recipient can decrypt and read each other’s emails. Your email messages will remain encrypted from third-parties and even from the ProtonMail servers.

It’s worth mentioning that this service doesn’t require any personal information in order to register, and even your IP address won’t be logged, so your privacy will remain protected.

The service is completely free and simple to use, and thanks to the modern design, you won’t have any issues getting used to ProtonMail.

Overall, ProtonMail is a great email encryption service, and it’s available for free. The service is available on multiple platforms including Android, iOS, Web.

Unfortunately, there’s no desktop client available, but that’s not a major problem for most users.

We have to mention that the Free version has limitations in terms of storage, a number of email addresses, and messages that you can send per day.

So if you want to remove those limitations, you might want to consider getting a yearly subscription plan.

Let’s quickly look at its key features:

  • Open source and free (with certain limitations)
  • End-to-end encryption
  • No log policy
  • Easy to use and modern design
  • Availability on iOS, Android and Web


Secure your emails with end-to-end encryption and enjoy Swiss-grade privacy.

Sign up
Visit website

Hushmail for Personal Use

Hushmail for Personal Use allows users to secure their email in order to keep their personal conversations private.

Using this piece of software, you will be able to regain control of your private data and to enjoy the experience of having a clean inbox with no advertising.

You will be able to choose the emails that you want to send using this tool’s powerful encryption features, and this will result in private and confidential conversations.

Let’s quickly look at its key features:

  • Includes 10 GB of storage space and multiple layers of security
  • Uses OpenPGP encryption that is guaranteed to protect the content of your email and provide secure connections between you’re and the servers
  • Your emails will not be analyzed to display all sorts of ads
  • Mask your email address by using various aliases
  • Dedicated customer support
  • Two-step verification to prevent unauthorized access to your account


Secure your email account with Hushmail's built-in encryption.

Visit website

Read your emails on multiple platforms with these top cross-platform email clients.


This is a plugin for I2P that lets users send and receive emails in the safest possible way.

This is an entirely decentralized and distributed email system that doesn’t need a server because the emails are stored in a distributed hash table.

Your emails will be automatically encrypted and digitally signed, and this will guarantee that no one will ever read your emails but the intended recipients. Third parties are not allowed to snoop around.

Let’s quickly look at its key features:

  • Create email identities with a single click, and send your emails anonymously/ under an alias
  • The whole encryption process and the signing in are transparent
  • I2P-Bote is based on ElGamal, Elliptic Curve, and NTRU Encryption
  • Delivery confirmation so that you can find out when your email reached the recipient
  • The user interface is effortless to understand and use, and translated into more languages


Automatically encrypt and digitally sign emails to experience utmost privacy.

Check out the best email-scanning tools to detect and remove viruses and spam.


Bitmessage is a P2P communication protocol that is used in order to send encrypted messages to another user but also to lots of subscribers for instance.

This protocol is decentralized and trustless. In other words, you will not have to trust any entities such as root certificate authorities.

Let’s quickly look at its key features:

  • Bitmessage uses strong authentication, and this means that the sender of a message cannot be spoofed and the non-content data will be hidden.
  • Users can freely view the Python source code on Github, and there will also be available step-by-step instructions on how to run the source code on Windows and more.
  • Bitmessage’s transfer mechanism is similar to Bitcoin’s transaction and block system, and you can find out more about this on Bitmessage’s whitepaper.
  • The users will receive all messages, and they will be responsible for attempting to decode each message to see whether it’s bound for them.

Check out Bitmessage


RetroShare was created back in 2006, and its primary target was to provide secure communication and file sharing between friends.

Developers have been joining the platform ever since, and they improved the software significantly.

RetroShare creates encrypted connections to your friends and guarantees that nobody will spy on you. This is entirely decentralized, and this means that RetroShare does not involve using central servers.

The program is open-source and free, and you will never have to deal with any costs, ads, or Terms of Service.

Let’s quickly look at its key features:

  • It creates encrypted connections in order to build a network of computers.
  • Provides various distributed services including channels, forums, and more
  • The program is available on Windows systems
  • Send text and images and discuss in decentralized chat rooms for maximum security and anonymity
  • Stores messages to deliver them while you are offline

Check out RetroShare


And last, but definitely not least, Sendinc is another excellent way of sending secure emails that you should learn about.

It’s also fast, safe, and free and it packs a great deal of fantastic safety-related features and advantages.

Let’s quickly look at its key features:

  • Military-grade encryption for emails (within Microsoft Outlook through a dedicated Add-In)
  • Does not store the encryption keys, and only your recipients will be able to decrypt the messages
  • Your recipients will not need any additional programs to see your messages
  • You can achieve and maintain compliance with GLBA, HIPAA, SOX, and more
  • Integrate email encryption straight into your applications with its APIs.

Check out Sendinc

These are our top recommendations for encrypted email software, and we advise you to head over to their official websites and check out their complete sets of features before you make up your mind.

Keep in mind that protecting your sensitive data and your communication is vital these days, and this is enough reason to consider using such software.

Frequently Asked Questions

This article covers:Topics: