25 Best Email Encryption Companies

Encryption plays a critical role not only in protecting sensitive information from unauthorized access but also in supporting compliance with evolving global privacy and data protection regulations. For multinational organizations, encryption can help navigate the complexities of overlapping laws such as GDPR, CCPA, and HIPAA.

Given these needs, email encryption providers have become an essential part of enterprise security architecture. These vendors offer solutions that uphold core principles of information security, confidentiality, integrity, and access control within the email channel. However, the email encryption sector is highly fragmented.

It includes a wide spectrum of providers, from agile startups focused on ease of use and freemium access models, to established vendors capable of supporting high-volume, compliance-driven deployments. Their offerings differ in several important areas: certificate lifecycle management, integration with cloud platforms, end-user experience, policy automation, and scalability across hybrid environments.

This article identifies 25 leading email encryption providers, selected through a comprehensive evaluation of their technical capabilities, relevance to key industry sectors, customer satisfaction, and ongoing innovation. Rather than highlighting a single dominant solution, the list reflects a balance of long-standing market leaders and emerging challengers, allowing decision-makers to assess which solutions align best with their organizational priorities and operational requirements.

Methodology

To rank these companies, we used a weighted set of criteria. Technical capabilities account for 30 percent of the score, including support for standards like S/MIME, PGP, and TLS. Usability and user interface quality make up 20 percent, as poor user experience often undermines adoption. Deployment flexibility and integration with platforms such as Google Workspace or Microsoft 365 represent another 20 percent. We allocated 15 percent to compliance and governance features, especially regarding GDPR, HIPAA, and regional privacy laws. The final 15 percent is based on real-world use cases, customer testimonials, and public partnerships.

Information was drawn from vendor documentation, analyst reports, customer reviews, and security certifications. Public records, case studies, and product announcements published in 2024 and early 2025 were included. The comparison table highlights common buyer concerns such as pricing model, deployment options, policy-based control, and key management support.

The Need for Email Encryption

Email encryption requirements differ significantly depending on an organization’s industry, regulatory exposure, and operational scale. While Transport Layer Security (TLS) offers basic encryption in transit, it doesn’t provide end-to-end protection or ensure message confidentiality once the message reaches its destination. This limitation has led to increased adoption of more advanced models such as end-to-end encryption (E2EE), S/MIME certificates, and policy-based encryption, which allow organizations to maintain greater control over how sensitive information is accessed, stored, and shared.

Industries that deal with sensitive financial data, protected health information (PHI), intellectual property, or legal communications often require encryption solutions that can scale alongside user growth, support hybrid or multi-cloud infrastructures, and align with global compliance mandates. As digital collaboration expands beyond email into platforms like Microsoft Teams, Slack, and WhatsApp, many organizations are now looking for encryption solutions that can operate within or integrate across these channels as part of a broader security strategy.

Despite the rise of new communication tools, email continues to serve as a critical channel for formal correspondence, legal documentation, and record-keeping. Regulatory frameworks such as GDPR, CCPA, and others increasingly require that both stored and transmitted personal data be protected through encryption or equivalent safeguards, making encryption not just a security feature but a compliance requirement.

To meet these needs, organizations are turning to technologies that offer Bring Your Own Key (BYOK) capabilities, certificate lifecycle automation, and policy-driven encryption enforcement. Solutions that support automated certificate provisioning, user-role–based policies, and integration with enterprise Key Management Services (KMS) are especially valuable for ensuring both agility and governance at scale.

Additionally, as organizations transition from on-premise systems to cloud environments, secure email remains a foundational layer of protection. Email encryption providers are increasingly expected to support data residency options, auditable logs, and integrations with third-party certificate authorities like DigiCert or GlobalSign.

Top 25 Email Encryption Companies

#1 Echoworx

Echoworx offers a customizable encryption platform built for enterprise scale. With support for S/MIME, PGP, and TLS, it enables secure communication regardless of recipient capabilities. Its certificate lifecycle management automates processes and supports BYOK and MYOK for key control. Echoworx also provides secure portals, policy enforcement, and branding options.

Its partnership with DigiCert enables automated S/MIME issuance, crucial for reducing IT overhead in sectors with frequent onboarding like financial services. Deployment options include integrations for Microsoft 365, Outlook, and Google Workspace, with consistent mobile and desktop experiences. Echoworx also operates regional data centers to address GDPR and cross-border data concerns.

#2 Virtru

Virtru provides data-centric security with encryption and access controls integrated into Gmail and Outlook. Its client-side encryption ensures only authorized users can access content. Virtru’s Data Protection Gateway enables policy enforcement for outbound emails, helping organizations meet HIPAA and CJIS requirements.

Virtru offers integrations with cloud storage providers and enterprise messaging tools. Its approach to zero trust encryption, using Trusted Data Format (TDF), provides content protection even outside email systems.

#3 Zix (now part of OpenText)

Zix is a longtime leader in email security, particularly in healthcare and finance. Its encryption service provides automatic message scanning and policy-based encryption. Users benefit from transparent TLS, portal-based secure messages, and Outlook plugins.

ZixSecure Cloud includes threat protection and archiving, creating a broader compliance platform. However, its legacy-heavy infrastructure may require more administrative setup compared to newer cloud-native platforms.

#4 Cisco Secure Email Encryption Service

Cisco offers enterprise-grade encryption that integrates with its larger email security stack. It supports content filtering, anti-malware, and DLP. Cisco’s S/MIME and web portal capabilities offer flexible recipient experiences. While highly secure, its setup is more complex than plug-and-play services.

Cisco’s appeal lies in integration with broader network security. Its centralized admin interface supports complex policy routing and threat analytics.

Best for: Large enterprises seeking integrated network and email security.

#5 Microsoft Purview Message Encryption

This native encryption for Microsoft 365 enables secure messaging within Outlook and Exchange. It supports Information Rights Management (IRM) and integrates with Microsoft Defender for Office 365. Messages can be encrypted, labeled, and tracked.

However, the solution’s effectiveness is best within the Microsoft ecosystem. Compatibility with external domains often involves user friction unless the recipient is also in the Microsoft environment.

#6 Proofpoint Email Protection

Proofpoint combines email encryption with advanced threat protection. It uses dynamic filtering and sandboxing to block malicious attachments before enforcing encryption policies. Encrypted messages can be viewed through secure portals or downloaded with expiration policies.
It also offers DLP and phishing protection, which makes it suitable for companies facing high attack volumes.

#7 Mimecast Secure Messaging

Mimecast offers policy-based secure email delivery via secure web portals. It provides native integration with Mimecast’s larger email continuity and archiving suite. Messages are automatically encrypted based on content, keywords, or sender rules.

While it lacks user-initiated encryption options, it works well for compliance-driven outbound filtering.

#8 Paubox

Paubox encrypts email by default, eliminating the need for portals or user action. It provides seamless integration with Gmail and Outlook, making it highly usable for healthcare providers. It is HIPAA-compliant and features built-in email threat protection.

#9 Tutanota

Tutanota is an open-source secure email provider offering E2EE and encrypted calendar features. It appeals to privacy-conscious users and small teams. Tutanota hosts its infrastructure in Germany, emphasizing compliance with European laws.

Its webmail interface lacks the sophistication of enterprise platforms, but it serves small businesses well.

#10 Proton Mail

Based in Switzerland, Proton Mail provides encrypted email services focused on individual users and small businesses. It offers open-source apps, zero-access encryption, and anonymity tools. Proton for Business adds user groups, custom domains, and admin tools.
While not suited for large-scale enterprise use, Proton is excellent for startups and journalists.

#11 Symantec (Broadcom)

Now part of Broadcom, Symantec’s Email Security. Cloud provides integrated encryption along with threat protection and DLP. It supports automatic encryption based on rules and offers secure web-based message retrieval for external recipients.

The platform includes detailed message tracking, allowing IT admins to audit email flow and policy enforcement. Symantec’s solution is enterprise-ready but typically requires expert configuration and ongoing tuning for optimal results.

#12 Barracuda Email Protection

Barracuda offers an encryption feature within its broader email protection platform. Messages flagged by policy are encrypted and sent via a secure web interface. It also provides options for recipient authentication and expiration controls.

Barracuda emphasizes ease of use, allowing SMBs to enable secure email without heavy infrastructure changes. However, customization is more limited compared to enterprise-specific solutions.

#13 LuxSci

LuxSci delivers HIPAA-compliant secure email with strong support for healthcare and legal sectors. It supports TLS, S/MIME, PGP, and secure portals. The platform provides user-level controls and logs to meet compliance and auditing standards.

It integrates with Microsoft and Google platforms and offers a SecureForm product for encrypted web form submissions. LuxSci also supports secure texting, extending encryption to mobile communications.

#14 Vircom

Vircom’s modusCloud platform integrates encryption with email filtering and archiving. The encryption module allows businesses to enforce rules based on content and recipients. Users can send secure emails through a browser-based portal or Outlook add-in.

Vircom emphasizes MSP-friendly features, enabling resellers to manage client accounts centrally. While less recognized globally, it remains a strong option for North American MSPs and SMEs.

#15 AppRiver (Zix | OpenText)

AppRiver, acquired by Zix and now part of OpenText, offers secure email and compliance solutions tailored for SMBs. The solution includes filtering, encryption, and archiving in one package. Portal-based secure messaging allows encrypted communication with any recipient.

Its licensing model and reseller network make it appealing for small firms needing strong protection without heavy investment.

#16 StartMail

StartMail, based in the Netherlands, offers private email with built-in PGP encryption and a focus on user privacy. While it targets individuals, it has expanded to offer domain-based accounts for small teams. Its infrastructure complies with GDPR and avoids data mining.

While it lacks enterprise policy control and S/MIME support, its simplicity and European roots make it attractive for privacy-minded users.

#17 Mailfence

Mailfence offers end-to-end encryption using OpenPGP. Based in Belgium, it emphasizes transparency and user control. It includes secure document storage and digital signing features.
Mailfence suits small teams or professionals who want strong privacy without depending on U.S.-based infrastructure.

#18 Hushmail

Hushmail provides encrypted email services tailored for healthcare, legal, and small business users. It offers webmail and mobile apps, plus secure web forms. Hushmail complies with HIPAA and includes electronic signature support.
Its encryption happens automatically for Hushmail-to-Hushmail messages, while external recipients receive links to access messages via a secure portal.

#19 Proton Mail Enterprise

While mentioned earlier for small teams, Proton Mail now offers enterprise-grade services with domain support, multiple user accounts, and admin dashboards. The Proton Bridge allows encrypted communication within Outlook clients.

Its Swiss jurisdiction, open-source encryption, and resistance to surveillance make it popular among legal, NGO, and privacy sectors.

#20 Trend Micro Email Security

Trend Micro includes encryption within its wider email security platform. The system scans for DLP policy triggers and encrypts accordingly. It also supports S/MIME and webmail-based retrieval for external recipients.

This platform is best when integrated with other Trend Micro tools, creating a layered security stack with endpoint and network defense.

#21 Zoho Mail with SecurePass

Zoho Mail includes email encryption through its SecurePass feature, offering password-protected message delivery and expiration controls. Though not end-to-end, it provides entry-level privacy for business users.

It fits well within Zoho’s ecosystem of productivity tools and works for startups or freelancers using Zoho One.

#22 Trustifi

Trustifi delivers advanced email security with AI-based threat detection, one-click encryption, and real-time tracking. Its portal-free decryption improves usability, while features like recall and delivery confirmation enhance control.

The platform supports compliance standards such as GDPR and HIPAA. It integrates easily with Microsoft 365 and Gmail.

#23 PreVeil

PreVeil uses zero-trust architecture and end-to-end encryption. Its solution includes encrypted email, cloud storage, and secure collaboration tools. PreVeil encrypts emails with asymmetric cryptography and stores data only in encrypted form.

Used in defense, finance, and healthcare sectors, PreVeil is certified for CMMC and ITAR compliance.

#24 Mailock by Beyond Encryption

Mailock enables secure messaging within Outlook and offers identity verification for sensitive messages. It provides user-level controls like read receipts, revocation, and message tracking.

Its UK-based infrastructure and focus on the financial and insurance sectors make it a strong regional solution for businesses handling confidential client data.

#25 Encyro

Encyro offers automatic email encryption with support for 18 compliance regulations, including HIPAA, GLBA, and GDPR. It features message auditing, secure web forms, and e-signatures.

Messages are encrypted both in transit and at rest, and recipients don’t need to register to view them. It integrates with Outlook and works well for small medical, legal, and financial practices.

The Bottom Line

As enterprises navigate increasingly complex compliance landscapes, the right email encryption solution must deliver more than just basic security. It must combine cloud readiness, administrative flexibility, and scalable key management to meet the demands of modern infrastructure and regulatory oversight. Key features like customer-managed encryption keys (MYOK or BYOK) are becoming essential, particularly for organizations operating across jurisdictions where data sovereignty and local governance laws must be observed.

Recent trends also highlight the growing importance of regional responsiveness, as vendors expand to meet the compliance needs of specific markets, such as the EU’s GDPR, Germany’s BDSG, or sectoral regulations in finance and healthcare. Integration with certificate authorities, including support for S/MIME automation, has become another key differentiator, particularly for teams managing large user bases or automating onboarding processes.

Beyond functionality, user experience and adaptability remain decisive factors. Enterprises are increasingly drawn to platforms that offer branding flexibility, multilingual support, and integration with existing productivity tools like Microsoft 365 and Google Workspace. Additionally, there is a greater need for SIEM integration. Reporting – especially real-time reporting has become a must-have for proof for audits/compliance.

These features help organizations embed encryption into workflows without creating friction for end users, something that is especially important in large, distributed teams or client-facing roles.

Ultimately, choosing the right email encryption provider requires more than checking off technical specifications. IT and security leaders must consider deployment model fit, ease of administration, interoperability with collaboration tools, and the provider’s track record of adapting to industry shifts. We recommend engaging directly with shortlisted vendors to explore capabilities in depth through demos, trials, or pilot deployments before making a long-term commitment.