Best Encryption Software for Microsoft Outlook

Find and compare the best Encryption software for Microsoft Outlook in 2025

Use the comparison tool below to compare the top Encryption software for Microsoft Outlook on the market. You can filter results by user reviews, pricing, features, platform, region, support options, integrations, and more.

  • 1
    Proton Mail Reviews
    Top Pick

    Proton Mail

    Proton AG

    $6.99/user/month
    108,629 Ratings
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    Secure your company’s communications with Proton Mail — the business email solution trusted by over 50,000 organizations. With end-to-end encryption built in, your internal and external communications stay confidential by default. Proton Mail helps your business meet GDPR, HIPAA, and other compliance standards, while giving you full control over your data under strong Swiss privacy laws. Empower your team with encrypted email and calendar, support for your custom email domains, professional branding, and simple migration from providers like Google Workspace or Microsoft 365 — no IT team required.
  • 2
    Trustifi Reviews
    Top Pick
    Trustifi provides industry-leading email security solutions that help small, medium, and large enterprises manage threat detection, regulatory compliance and data encryption. Easily deployable on Outlook, Gmail, and any other email server via relay **Advanced Threat Protection** -Malware/ransomware virus detection and BEC attack prevention and alarms **Data Loss Prevention** --100% compliant HIPAA/HITECH and PII, GDPR. FSA, LGPD, CCPA and more **Encryption** -NSA-grade. Only select Enterprise customers have access the company branding and product white-labeling. One-on-one training for teams. There are many encryption requirements, so there is no one-size-fits all solution for email security. Many times, customized solutions are available on request and often free of charge.
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    Tresorit Reviews
    Top Pick

    Tresorit

    Tresorit

    $10.42/month
    9 Ratings
    End-to-end encrypted file sharing & sync Tresorit is the secure cloud storage and sync place to store, sync, and share files from anywhere, anytime. Tresorit uses end-to-end encryption to protect your files from hackers and internal data breaches. All data is stored in accordance with the GDPR in Europe in Microsoft Azure Datacenters. You can manage who can edit, add, or view the data you share. Securely access the updated files from your browser, desktop or mobile device. Files can also be shared securely outside of your company. Securely share files instead of unsecured attachments to email. End-to-end encryption ensures that nothing leaves your device unencrypted. This means that only you and the recipient can access the files. To ensure collaboration with external parties, use the Content Shield features to protect your Business. Read more here: https://tresorit.com/tresorit-content-shield
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    ZevaCrypt Reviews

    ZevaCrypt

    ZevaCrypt

    $9.90 per month
    Enhance the return on investment for current PIV infrastructure in cross-agency encryption by utilizing ZevaCrypt™, a comprehensive and user-friendly end-to-end encryption solution. Email communication, particularly over secure channels, has consistently posed significant security challenges, especially for those tasked with enforcing the use of high assurance credentials like PIV and CAC. Given that email serves as the primary communication method for both sensitive and non-sensitive information, the importance of secure exchanges cannot be overstated. While encrypting emails within a single organization is relatively straightforward, achieving encryption across different organizations remains complex and often requires manual intervention. Existing PKI encryption systems fall short of providing the necessary level of security, as they typically do not validate certificate policies in accordance with their intended design. It is essential to understand that robust encryption must integrate strong identity verification with advanced cryptographic techniques. In this context, PKI encryption emerges as the sole method capable of fulfilling this essential convergence of objectives, ensuring that sensitive communications remain secure across various agencies.
  • 5
    WinZip SafeShare Reviews

    WinZip SafeShare

    WinZip

    $34.95 one-time payment
    Experience a contemporary method of sharing that prioritizes confidence and security in an easy-to-use platform designed for simplicity. This robust tool empowers users to share, compress, and encrypt files seamlessly through a straightforward interface. Effortlessly distribute files to multiple destinations while benefiting from enhanced security measures, including military-grade encryption and time-sensitive sharing options. Take advantage of expanded cloud services featuring providers like OpenStack, SwiftStack, Alibaba, Wasabi, HP, Oracle, Azure, WebDAV, CenturyLink, IONOS, and OVH. Merge several PDF documents into a single file for convenient saving, zipping, or sharing purposes. Optimize your workflow by sharing directly through Slack IM, and effectively manage files shared via WinZip or ZipShare. Furthermore, users can open, view, re-share, or remove files at their discretion, while keeping track of Zip files shared through WinZip or ZipShare. Enhance your communication by emailing anyone directly from WinZip, incorporating contacts from various supported sources into a unified address book for easier access. This streamlined approach not only simplifies sharing but also enhances productivity across your collaborative efforts.
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    RMail Reviews

    RMail

    RPost

    $7/month/user
    RMail®, the e-security platform from RPost®, is a global leader in 2000. RMail is a specialist in elegantly simple email encryption for privacy, compliance, legal e–delivery proof secure file sharing, email rights management, email impostor protection and email encryption. RMail's transmission security services are often used by businesspeople and business systems that need to send sensitive or consumer-regulated information. These RMail services can be used for messages that require additional functionality beyond standard email. They include (a) an easier-to-use and more automated email encryption to ensure privacy compliance; (b) a verifiable proof record of who sent what email to whom; (c) assurance and peaceof mind in relation to delivery and open status email of important and time-deadline emails, (d) need to have a timestamped proof that content was delivered; (f) the need to securely share large files.
  • 7
    Cryptshare Reviews

    Cryptshare

    Cryptshare

    €5 per user per month
    Cryptshare is an innovation that protects your information when it is most at risk. Everybody needs to communicate data and messages in their daily work. We face many limitations once data is in transit. 1. Data protection 2. Limitations on file size These problems can be solved with our solution in an efficient and user-friendly manner. It also offers many other benefits, including: *Detailed audit trail *Compliance to central data protection regulations *Excellent potential to automate business communication It is also affordable, simple to implement, and accessible from any device with a web browser. Cryptshare is compliant with ISO 27001, GDPR. Cryptshare protects your information throughout the process.
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    Sealit Reviews

    Sealit

    Sealit Technologies

    In adopting a Zero Trust security framework, it's essential to operate under the assumption that both your accounts and devices are vulnerable to compromise. With Sealit, your confidential information contained in emails and files will remain secure, even in the event of a breach. You can easily encrypt sensitive emails with a single click directly from your existing inbox, and a similar action allows you to secure any file type on your desktop. We have designed our system to integrate smoothly into your workflow, enhancing the protection of your critical data without causing disruptions. Given that human error is responsible for over 90% of cyber attacks on organizations, implementing a robust risk mitigation strategy is crucial. Our innovative end-to-end encryption safeguards every aspect of your business, ensuring comprehensive security. Additionally, our application employs biometric authentication, offering a user-friendly protection experience. Unlike traditional passwords, biometrics are inherently secure as they cannot be lost, require no memorization, and are always accessible. This approach not only enhances security but also simplifies the user experience, making it a more effective solution for safeguarding your sensitive information.
  • 9
    SalaX Secure Collaboration Reviews
    SalaX Secure Collaboration serves as a comprehensive platform that simplifies the encryption of emails, messages, chat rooms, and audio/video communications, ensuring privacy, compliance, and proper record-keeping. This suite features SalaX Secure Messaging and SalaX Secure Mail, which create secure channels for transmitting confidential, restricted, or sensitive information. Designed with a focus on security, it provides complete audit trails and offers flexible deployment methods, empowering organizations to retain control over their data. Additionally, it includes encrypted video conferencing, secure file sharing, and safeguarded calls and messages, covering all essential communications. Organizations can meet data sovereignty demands through options like public cloud, private cloud, or on-premises installations, while sending messages without leaving any traces on public servers. Users also have the advantage of managing their own encryption keys securely. Unlike traditional email or chat services that permit attachments of up to 30MB, our solution allows for the transfer of files as large as 1GB, enhancing productivity and collaboration. This ensures that all critical communications are not only secure but also efficient.
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