Worried about a data breach?
A single insecure email can trigger a massive data breach, leading to hefty compliance fines and serious reputational damage for your entire organization.
The pressure is on you to prevent these catastrophic security failures, but finding the right solution among endless vendor claims can feel overwhelming.
According to Barracuda, 23% of malicious emails contain attachments designed specifically for phishing and credential theft. This shows how easily standard inboxes become gateways for attackers.
Fortunately, the right encryption software can neutralize these specific threats before they cause any real damage and put your compliance status at risk.
In this guide, I’ve done the heavy lifting. I’ll walk you through the best email encryption software to protect your data and meet regulations.
You’ll discover tools that automate protection and integrate smoothly, without adding friction for your end users.
Let’s dive in.
Quick Summary:
| # | Software | Rating | Best For |
|---|---|---|---|
| 1 | RPost → | Compliance-focused organizations | |
| 2 | Mimecast → | Large enterprises & cybersecurity | |
| 3 | Proton → | Mid to enterprise businesses | |
| 4 | Virtru → | Regulated industries | |
| 5 | Tutanota → | Security-conscious organizations |
1. RPost
Is your email truly compliant and secure?
RMail provides dynamically adapting email encryption, which goes beyond basic TLS to offer robust end-to-end encryption and secure file sharing. This means your organization can confidently meet privacy regulations like GDPR and HIPAA.
This approach offers peace of mind, knowing your sensitive data is protected, and helps prevent data leaks from human error.
What if your emails could protect themselves?
RMail’s holistic, AI-infused security layers integrate into your inbox, automatically sensitizing users to security needs. This makes it easier for your team to make the right e-security decisions without disrupting their workflow.
Additionally, RMail includes targeted attack pre-emption features, providing real-time alerts about eavesdropped accounts, lookalike domains, and reply hijacking. This offers must-have additional layers for business email compromise defense, intercepting cybercriminal attempts before they succeed. Plus, you get a Registered Receipt™ email record, offering court-accepted, timestamped proof of secure delivery and content.
The result is reduced costs and app complexity.
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Key features:
- Email Privacy & Compliance: Dynamically adapts encryption to ensure end-to-end security, secure file sharing, and auditable proof for GDPR and HIPAA compliance.
- Human Error Prevention & DLP: Uses AI and automated rules to provide in-the-moment security insights, empowering users and preventing data loss with timely recommendations.
- Targeted Attack Pre-emption: Delivers real-time alerts for compromised accounts, tricky lookalike domains, and reply hijacking, protecting your business from mis-wires and fraud.
Learn more about RPost features, pricing, & alternatives →
Verdict: RMail is an excellent choice for organizations seeking the best email encryption software, particularly those needing to balance compliance with robust security. Its AI-infused features, including dynamic encryption and human error prevention, combined with a unique, court-accepted certified proof of delivery, make it a comprehensive solution for managing email security risks.
2. Mimecast
Are your email communications truly secure?
Mimecast offers advanced AI-powered email security to defend against sophisticated email and collaboration attacks.
This means you can block advanced BEC attacks missed by traditional email security, safeguarding your financial data, source code, and intellectual property.
It’s time to gain unparalleled protection.
Mimecast’s integrated human risk management platform prevents evolving threats targeting human error within your organization. They achieve this with advanced AI blended with proven defenses for industry-leading protection.
You can address all forms of insider threats and simplify data management with real-time insights, helping your team proactively support regulatory and corporate standards. This focus on human risk, coupled with email and collaboration threat protection, helps your business navigate the ever-expanding threat landscape by processing 7 billion signals daily to prevent breaches.
Keep ahead of evolving threats.
Key features:
- AI-Powered Advanced Email Security: Defends against sophisticated email and collaboration attacks, stopping advanced Business Email Compromise (BEC) attempts often missed by traditional security solutions.
- Integrated Human Risk Management: Protects critical data and accelerates response to insider threats, simplifying data management with real-time insights for proactive compliance support.
- Data Compliance & Governance: Proactively supports regulatory and corporate standards, ensuring your email works and data is never lost with capabilities like email archiving.
Learn more about Mimecast features, pricing, & alternatives →
Verdict: For cybersecurity directors and IT decision makers needing robust solutions, Mimecast stands out as a strong contender for best email encryption software. Its AI-powered security, integrated human risk management, and data compliance features directly address concerns about regulatory standards, data breaches, and insider threats, proving highly effective for over 42,000 customers.
3. Proton
Are your business communications truly secure?
You’re likely seeking robust email encryption that easily integrates and maintains compliance. Proton Mail offers end-to-end and zero-access encryption, ensuring only you can access your data.
This means no one, not even Proton, can read your emails without your explicit permission. This directly addresses your need for stringent data protection and regulatory adherence.
Here’s how to ensure your data stays private.
Proton’s email encryption is automatic and seamless, making it incredibly intuitive for your entire team. Plus, the Easy Switch feature allows you to effortlessly import and encrypt existing data from platforms like Google or Outlook in just a couple of clicks, streamlining your migration.
Additionally, Proton’s services are open source and independently audited by security experts, providing critical transparency and earning trust through peer review. This commitment to security, combined with being based in Switzerland under strong privacy laws, provides a neutral and safe haven for your organization’s sensitive information.
Your privacy is mathematically ensured.
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Key features:
- End-to-end encryption: Guarantees only authorized individuals can access your data, meeting strict compliance requirements and protecting against unauthorized breaches.
- Seamless data migration: Easily import and encrypt existing emails from other services, ensuring a smooth transition without disrupting your team’s workflow.
- Swiss privacy laws: Your data is protected by some of the world’s strongest privacy regulations, providing a neutral and secure environment for your sensitive communications.
Learn more about Proton features, pricing, & alternatives →
Verdict: Proton is a strong contender for the best email encryption software, particularly for mid-sized to enterprise-level organizations. Its end-to-end and zero-access encryption, combined with Swiss privacy laws and open-source transparency, directly addresses critical compliance and security needs, as evidenced by its securing over 10,000 businesses globally.
4. Virtru
Struggling to secure sensitive data while ensuring compliance?
Virtru offers robust data security across Google Workspace and Microsoft 365, including Gmail, Outlook, Drive, OneDrive, and SharePoint. This means your team can protect email and file sharing within their existing workflows.
You’ll gain persistent control over information shared externally, preventing data loss by automating and enforcing granular access policies. This helps mitigate data breaches and compliance risks.
Here’s how Virtru can help.
Virtru’s Data Security Platform provides secure collaboration and file sharing, integrating with your everyday apps. You can maintain full control and data sovereignty over sensitive information shared with both internal and external teams.
This platform supports regulatory compliance with AES-256 bit encryption, meeting strict standards like HIPAA, GDPR, CMMC, and ITAR. You can also control private encryption keys with Virtru Private Keystore, ensuring your data remains entirely under your command. This allows flexible deployment options, whether self-managed or cloud-based.
Additionally, the Virtru Data Protection Gateway automatically protects sensitive SMTP data flows from any application. This comprehensive approach simplifies secure information sharing without disrupting your users’ current workflows, which is perfect for industries like healthcare or finance.
The result is truly secure data sharing.
Key features:
- Secure Collaboration and File Sharing: Protects sensitive data across Google Workspace and Microsoft 365, including email and file attachments.
- Private Key Management: Offers flexible options to control encryption keys, supporting self-managed, cloud, or client-side encryption deployments.
- Regulatory Compliance Support: Utilizes AES-256 bit encryption to meet stringent regulations like HIPAA, GDPR, and CMMC, ensuring data protection in transit and at rest.
Learn more about Virtru features, pricing, & alternatives →
Verdict: Virtru stands out as a strong contender for the best email encryption software, particularly for organizations grappling with strict compliance requirements. Its seamless integration with major platforms and granular access controls, as demonstrated by a 100% increase in delivery rate for a broker-dealer seeking SEC compliance, provides essential peace of mind.
5. Tutanota
Are you struggling to ensure email compliance and prevent breaches? You need a solution that balances robust security with user-friendly functionality. Tuta offers end-to-end encryption for your email, calendar, and contacts, leveraging post-quantum cryptography to safeguard your data. This means your sensitive information remains protected against current and future threats, easing concerns about data integrity and regulatory adherence.
Managing overwhelming options for secure communications?
Tuta directly addresses this by providing an intuitive design for a fast workflow, ensuring an organized user experience. This helps streamline your operations, while still maintaining high security standards. You can integrate it with your existing platforms seamlessly. The result is a secure and efficient communication hub.
Tuta automatically encrypts all your data end-to-end, making it a highly secure email provider. This is vital for organizations seeking to enforce zero-trust access policies and automate encryption key management. It supports secure client-side encryption for regulated industries, crucial for meeting stringent compliance requirements like GDPR and HIPAA. Additionally, Tuta’s built-in zero-knowledge calendar respects your privacy, with encryption guaranteeing your calendar data belongs solely to you. It integrates perfectly with your email for managing meetings, ensuring private push reminders without reliance on Google.
Protect your organization’s sensitive communications.
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Key features:
- End-to-end encryption: Tuta automatically encrypts all your data with quantum-safe cryptography, providing maximum data protection and ensuring compliance with strict privacy regulations.
- Intuitive design and mobile apps: Enjoy an intuitive design for fast workflows and stay connected with dedicated apps for Android, iOS, Windows, macOS, and Linux, supporting online and offline use.
- Zero-knowledge calendar: Securely manage personal and business events with a built-in calendar that features end-to-end encryption, ensuring your appointments and invitations remain private.
Learn more about Tutanota features, pricing, & alternatives →
Verdict: Tuta stands out as a strong contender for the best email encryption software, particularly for organizations prioritizing robust security, ease of use, and strict data privacy. Its end-to-end, quantum-safe encryption, combined with an intuitive interface and integrated calendar, directly addresses the core pain points of cybersecurity directors seeking comprehensive compliance and breach prevention solutions.
6. Proofpoint
Struggling with email compliance and data breaches?
Proofpoint offers robust email encryption, stopping human-centric threats across your digital workspace. This means safeguarding your sensitive information effectively.
Their comprehensive platform protects your people from email, collaboration, and cloud threats. It leverages AI-based detection to stop attacks.
This leads to a more secure communication environment.
Proofpoint directly solves your need for secure communication, offering advanced threat protection and data governance. Their solution features AI-driven detection to combat email and cloud threats, ensuring your sensitive data remains confidential. Additionally, Proofpoint helps manage risk and data retention with modern compliance and archiving solutions. You can also secure your Microsoft 365 environment with their offerings. Plus, they protect your brand reputation by identifying email lookalikes and accelerating DMARC implementation, providing a holistic security approach. This comprehensive protection fosters trust and growth for your organization.
Your data and people are truly protected.
Key features:
- Threat Protection: Proofpoint stops all human-centric threats, including phishing, BEC attacks, and email fraud across email and collaboration tools, safeguarding your workforce.
- Data Security & Governance: Their platform safeguards information and digital communications with a human-centric approach, preventing data loss from careless or malicious users.
- Security Awareness: Proofpoint provides continuous guidance to employees, making your users resilient against human-targeted attacks and helping them make correct security decisions.
Learn more about Proofpoint features, pricing, & alternatives →
Verdict: Proofpoint is a top contender for the best email encryption software, trusted by 85 of the Fortune 100. It effectively addresses your needs for compliance and breach prevention by focusing on human-centric security, offering advanced threat protection, data governance, and security awareness training to fortify your organization against evolving cyber threats.
7. Zix
Are you drowning in email compliance headaches?
Zix directly addresses this by offering enterprise-grade encryption and data privacy solutions. This means you can mitigate compliance risk and always be protected.
Their solution helps you keep sensitive information secure and compliant, especially for regulated industries like healthcare. This provides a strong foundation for business security.
Here’s how Zix simplifies security.
Zix delivers a comprehensive suite that ensures secure communication and data protection for your organization. This means your business communications are protected leveraging machine-learning techniques and live 24/7 threat analysts.
You can also automate and make eDiscovery easier for your team by archiving all communications. Plus, Zix protects your inbox and network from cyber threats. This integrated approach helps eliminate barriers and enables your team to get more done with robust, enterprise-grade security.
The result is peace-of-mind data protection.
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Key features:
- Automatic Email Encryption: Zix offers automatic and fully transparent email encryption alongside data loss prevention, simplifying secure communication for your team.
- Comprehensive Threat Protection: Protect your inbox and network from cyber threats with Zix’s email threat protection, leveraging machine-learning and 24/7 threat analysts.
- Data Archiving & Compliance: Easily archive all communications for eDiscovery and ensure compliance, supported by enterprise-grade encryption and data privacy.
Learn more about Zix features, pricing, & alternatives →
Verdict: If you’re seeking the best email encryption software to ensure HIPAA compliance, Zix is an excellent choice. With over 1,200 U.S. hospitals trusting Zix, it delivers robust enterprise-grade encryption and automated data loss prevention to mitigate your compliance risks and secure sensitive information.
8. Hushmail
How do you ensure client privacy with every email?
Hushmail offers secure email and e-signable forms, vital for industries handling sensitive data. This means you can confidently exchange confidential information.
This capability directly addresses your need for compliance with regulations like HIPAA, ensuring your organization maintains confidentiality and avoids costly breaches.
You’re ensuring peace of mind.
Hushmail solves the problem of secure communication by providing encrypted email, protecting your clients and demonstrating your commitment to their privacy. To encrypt an email, you simply click a toggle, and a green lock icon confirms it’s secure.
Additionally, your clients can send encrypted replies without downloading or installing anything; they receive a private link that directs them to a user-friendly page for secure exchanges. This approach minimizes friction for end-users while maintaining robust security protocols crucial for compliance and trust. Plus, the platform supports building e-signable forms with a drag-and-drop interface, ideal for collecting intake details and attachments securely, streamlining your administrative tasks, and keeping documentation organized.
Your sensitive communications remain confidential.
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Key features:
- Encrypted Email Communication: Send and receive secure emails with a simple toggle and visual green lock icon, ensuring confidentiality for sensitive client discussions.
- Secure Forms & E-Signatures: Build HIPAA-compliant, e-signable forms with drag-and-drop ease, streamlining client intake and secure document collection directly to your inbox.
- Client-Friendly Encrypted Replies: Your clients can reply securely to encrypted emails through a private web link, requiring no downloads or installations on their end.
Learn more about Hushmail features, pricing, & alternatives →
Verdict: For cybersecurity directors and IT decision-makers in regulated industries like healthcare or legal, Hushmail stands out as a best email encryption software solution. Its HIPAA-compliant email and e-signable forms, trusted by over 47,000 healthcare professionals, directly address critical compliance needs and streamline secure client communication.
Conclusion
Protecting your data is non-negotiable.
Choosing the right encryption tool is tough. You must balance complex compliance needs, technical features, and user friction without breaking your IT budget.
Barracuda reports that 20% of companies experience at least one account takeover every month. This makes robust email encryption essential for protecting your organization’s sensitive credentials from falling into the wrong hands.
Here is what I would recommend.
From my analysis, RMail by RPost stands out. It directly addresses compliance, prevents human error, and provides the provable security that enterprises demand.
I was especially impressed by its Registered Receipt™ feature, offering court-accepted proof of delivery. This makes it the best email encryption software for ensuring audit-proof compliance.
I highly recommend you book a free demo of RPost and see how its dynamic encryption can protect your team.
You’ll finally gain true peace of mind.
