Top Free Email Encryption Software - Page 3

How Many Email Encryption Software Products Does G2 Track?

Total Products under this Category: 93

Category Stats (Oct 2026)

  • Average Rating: 4.56/5 The average rating of products in this category, based on all submitted ratings
  • Top Trending Product: Barracuda Email Gateway Defense (+0.5%) - Among all products in this category, Barracuda Email Gateway Defense recorded the largest rating increase compared to last month

Last updated: October 01, 2026

How Does G2 Rank Email Encryption Software Products?

Why You Can Trust G2's Software Rankings:

  • 30 Analysts and Data Experts
  • 4,400+ Authentic Reviews
  • 93+ Products
  • Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.

G2 Grid® for Email Encryption Software

G2 Grid® for Email Encryption Software plotting products by satisfaction and market presence

Highlighted products: Proton Mail For Business, Paubox, Virtru Email Encryption, Proofpoint Core Email Protection, Check Point Email Security, Proofpoint Email Encryption, FTAPI, and Tresorit.

Underlying data: [Grid® JSON](https://www.g2.com/categories/email-encryption/grids.json?focus%5B%5D=proton-mail-for-business&focus%5B%5D=paubox&focus%5B%5D=virtru-email-encryption&focus%5B%5D=proofpoint-core-email-protection&focus%5B%5D=check-point-email-security&focus%5B%5D=proofpoint-email-encryption&focus%5B%5D=ftapi&focus%5B%5D=tresorit)

OpenText Core Email Encryption​

OpenText Core Email Encryption is a secure email encryption solution that helps organizations protect sensitive communications and attachments from unauthorized access, interception, and data leaks. Designed for businesses of all sizes, it enables users to send encrypted emails easily while helping organizations meet regulatory compliance and data privacy requirements. With seamless integration into Microsoft 365 and existing email environments, OpenText Core Email Encryption simplifies secure communication without disrupting user workflows or requiring complex administration. Key benefits include: • Protect sensitive emails and attachments with strong encryption • Help meet compliance requirements such as HIPAA, GDPR, PCI DSS, and other data privacy regulations • Simplify secure email delivery with an intuitive user experience • Reduce the risk of data breaches, phishing exposure, and accidental data loss • Seamless integration with Microsoft 365 and existing email platforms • Secure message access for internal and external recipients • Centralized policy management and encryption controls • Cloud-based deployment for simplified administration and scalability • Improve customer trust by securing confidential communications OpenText Core Email Encryption helps organizations secure business communications, strengthen compliance, and protect sensitive data across hybrid and cloud email environments.

Who Is the Company Behind OpenText Core Email Encryption​?

  • Seller: OpenText
  • Year Founded: 1991
  • HQ Location: Waterloo, ON
  • Twitter: @OpenText
    21,565 Twitter followers
  • LinkedIn® Page: www.linkedin.com
    22,835 employees on LinkedIn®
  • Ownership: NASDAQ:OTEX

Secure Exchanges

Secure Exchanges is a Canadian cybersecurity company founded to address the growing need for secure digital communications in Canada and internationally. The company develops and operates a cloud platform dedicated to protecting sensitive data exchanges. Its solutions serve businesses, professional firms, financial institutions, government agencies, and healthcare organizations that need to safeguard the confidentiality of their daily communications. The platform is available in English and French. The platform offers three core capabilities: end-to-end encrypted email, secure large file transfer supporting files up to 25 GB, and Adobe AATL-certified digital signatures. All communications are protected by AES 256 encryption and a zero-knowledge architecture, meaning neither Secure Exchanges nor any third party can access exchanged data or encryption keys. The solution integrates directly into Outlook and Gmail as a plugin, requires no IT team for deployment, and allows recipients to receive and reply securely without a license. Secure Exchanges addresses a critical challenge for organizations subject to confidentiality requirements: securing sensitive data exchanges without adding complexity to existing workflows. By integrating into the email tools already in use, the platform eliminates the friction typically associated with encrypted communications. Compliance with Quebec's Law 25 and the European GDPR, combined with SOC 2 Type II certification, enables organizations to meet their regulatory obligations for personal information protection and data security.

Who Is the Company Behind Secure Exchanges?

StartMail

StartMail is a privacy-focused email service that offers secure and private email communication. It provides users with encryption options, both for sending emails and for storing data. StartMail ensures that emails are not scanned for advertising purposes, as commonly done by free email services. It also offers features like disposable email addresses to enhance anonymity and protect users from spam. The service is built by the creators of Startpage, a privacy-oriented search engine, and it is aimed at individuals and businesses looking for more control over their email security and privacy.

Who Is the Company Behind StartMail?

AI can help you find the answers. G2 helps you trust them.

Connect G2 to Claude or ChatGPT for answers grounded in G2's trusted reviews, comparisons, and pricing from real user insights.

How it works
Connect G2 to ChatGPTConnect G2 to Claude

The Data Krypter

The easy way to keep your data secure well into the future when quantum computers become mainstream. -encrypts files, folders and blocks of text -when encrypting a file/folder, you can: - -give the file/folder a random name - -securely erase the original -makes your data useless to an attacker in case you are ever a victim of ransomware. But you need to prepare ahead of time by encrypting your sensitive files. Then the attacker cannot: - -use your data or - -threaten to make your files public -you can receive encrypted files from someone else and only one of you needs to have a paid version (or a non-expired trial version) of the Data Krypter. i.e. an accountant or lawyer pays for the software and all their clients can send encrypted files with a trial version (even if it has expired). -even if someone has access to your computer they can't decrypt your files because your: - -master password is encrypted - -private keys are encrypted - -secret keys are encrypted (stored only to help recover keys). -recovery any lost keys or master password with the Data Recovery module <== NEW -symmetric encryption (the same secret key to encrypt and decrypt) using PERNG -asymmetric encryption (public/private keys) using NTRU-2x2 -both types of encryption are quantum proof -send encrypted emails by encrypting the text then pasting it into an email -no back door

Who Is the Company Behind The Data Krypter?

Lauren Worth
LW
Researched and written by Lauren Worth
Updated October 3, 2024