List of the Top 22 Email Encryption Software for Microsoft Outlook in 2026

Proton Mail for Business offers a secure and professional email solution trusted by 50,000 organizations. Built with end-to-end encryption and protected by Swiss privacy laws, Proton Mail ensures your sensitive information is safe from unauthorized access and data leaks. Whether you're a small business or a large organization, you can ensure regulatory compliance, reinforce client trust, and keep your communications safe. Easily migrate your team from Google or Microsoft, use your own email domain for your communications, and manage your schedule with Proton Calendar — all in a user-friendly, privacy-focused platform.

NeoCertified protects confidential data through our secure email application, which operates seamlessly on our adaptable Cloud-based platform. It is accessible via any web browser and integrates with Microsoft Office 365/Outlook and Gmail, while also offering dedicated mobile applications for both iPhone and Android devices. Since our inception in 2002, we have been delivering secure mail solutions that comply with federal standards, enabling organizations to send and receive secure emails from any web browser or mobile platform. Our service is compatible with all email providers, ensuring that businesses enjoy the flexibility and robust security they require for their communications. Additionally, our commitment to constant innovation guarantees that we meet the evolving needs of our clients in an increasingly digital world.

Mailfence is a provider of encrypted email services that employs OpenPGP-based encryption along with digital signatures for enhanced security. It boasts an array of features that facilitate collaboration while ensuring both security and convenience are maintained. Users can securely store and edit documents through Mailfence Document, and sharing these documents with teammates is as simple as a single button press. Additionally, the Mailfence Calendar helps users manage tasks, meetings, events, and other vital information efficiently. The Contacts feature allows for the storage of contact information and the creation of mailing lists, which enhances overall productivity. Designed with full interoperability in mind, Mailfence can be synced seamlessly with various services. Furthermore, it offers fully customizable whitelabel versions of its interface, catering to diverse branding needs. In a commitment to online privacy, Mailfence contributes 15% of its PRO subscription revenue to organizations like IFF or EDRI. This dedication to supporting privacy advocacy is a testament to Mailfence's values.

PreVeil transforms the landscape of end-to-end encryption by providing exceptional security for organizations' emails and files, shielding them from various threats such as phishing, spoofing, and business email compromise. The platform prioritizes user-friendliness, making it accessible for employees while remaining simple for administrators to manage. By implementing PreVeil, companies can utilize a secure and easy-to-navigate encrypted email and cloud storage solution that protects vital communications and documents effectively. With its advanced end-to-end encryption, PreVeil guarantees that data is safeguarded at every stage of its lifecycle. Moreover, the platform includes a feature known as the “Trusted Community,” which promotes secure interactions among employees, contractors, vendors, and other external entities. This groundbreaking addition enables users to exchange sensitive materials with confidence, assured that they are shielded from prevalent cyber threats. Ultimately, PreVeil not only enhances security for organizations but also cultivates a cooperative atmosphere that encourages teamwork and collaboration among its users. By prioritizing both safety and usability, PreVeil addresses the evolving needs of modern businesses.

Spike consolidates your entire workspace into a single Inbox that encompasses email, chat, calendars, calls, team collaboration, and tasks, effectively streamlining your workflow by eliminating the need to toggle between multiple applications. By combining conventional email with instant messaging, Spike's conversational email feature reduces the chaos of lengthy email threads. With real-time communication and live collaboration capabilities, users can enjoy enhanced interactions that foster a more personable communication atmosphere. Available on iOS, Android, Mac, and Windows, Spike ensures that you can stay connected and organized no matter what device you are using. This integration of features is designed to improve productivity and simplify the way you manage your professional communications.

Senders maintain complete control by restricting what recipients can do with content, including the ability to print, share, or download, and they can revoke access whenever needed. Identillect remains responsive to regulatory changes through continuous research, allowing you to concentrate on your primary responsibilities. The platform is designed to be easily navigable for both senders and recipients, who do not need to register or subscribe to receive messages. Enhance your secure communications effortlessly through Outlook by utilizing Identillect’s advanced vCard technology. You have the flexibility to set your desired security level and implement company-wide policies that limit recipient permissions across your network, ensuring consistent protection. This add-in simplifies message security and responses while you're on the go, offering all the functionalities of Delivery Trust® – Web Only. Its user-friendly interface guarantees a smooth implementation process across your organization without the burden of a steep learning curve. Additionally, the add-in provides full access to all features of DELIVERY TRUST® – Web Only, thereby guaranteeing extensive security for every communication you send. By leveraging these capabilities, you can confidently safeguard sensitive information and maintain control over your communications at all times.

You can send and receive encrypted emails that adhere to HIPAA and GLBA regulations, ensuring your communications remain secure. Known previously as Protected Trust Email Encryption, our service has now been rebranded to Send It Secure by Protected Trust. This change reflects our evolution and the expansion of our email encryption capabilities, as well as our broadening range of services. We decided it was the right time for a new identity to represent our commitment to delivering a reliable solution in the marketplace. This rebranding emphasizes our dedication to enhancing user experience through tailored improvements. As a recognized leader in securely transmitting sensitive information, we prioritize maintaining your trust and protecting your data at all costs. We are excited to introduce you to our upgraded email encryption solution, Send It Secure by Protected Trust, and are committed to effectively meeting your secure communication requirements with greater efficiency. Our goal is to ensure that your experience with our services is both seamless and secure.

Encyro provides a suite of secure solutions including encrypted email, electronic signatures, and secure file storage, all designed with an award-winning interface that simplifies the experience for both you and your clients, who won’t need to create portal accounts. With Encyro, you can share files and send encrypted messages directly to any email address, ensuring your data is safeguarded during both transmission and storage, thereby meeting essential compliance requirements like HIPAA, GDPR, FINRA, and SOX. Your clients can securely upload files via a custom-branded upload page without needing to log in or take any extra steps. When it comes to electronic signatures, Encyro provides a seamless experience for remote signing, allowing you to manage login options and signature types to guarantee that the correct individuals are signing documents. Encyro's features include custom branding, automated reminders, reusable e-sign templates, and secure access codes that adhere to NIST-800-63 standards, which can be sent via SMS or text for enhanced security. Furthermore, this platform not only prioritizes user convenience but also fortifies the integrity of your transactions, making it a valuable tool for any business.

Achieve effortless data privacy compliance with PBHS Secure Mail, a comprehensive encrypted messaging platform that meets HIPAA standards, tailored for healthcare providers including physicians, dentists, and medical facilities. The platform's user-friendly design eliminates the need for installation, configuration, or ongoing maintenance, enabling access from any device and location. Sharing essential documents, such as radiographs, CT scans, and messages is simplified, with all information well-organized for easy retrieval by your entire team. Initiating use is straightforward; just log in with your ADA Membership ID. Furthermore, the optional Outlook Plug-in enables the convenient sending and receiving of messages directly within Microsoft Outlook on your computer, ensuring that treatment letters and private communications from your management software remain encrypted. Radiographs dispatched from your digital x-ray systems to Outlook are also safeguarded. You can maintain your regular email interactions with colleagues and patients while upholding HIPAA compliance, which facilitates an effortless transition to secure communications. This innovative solution allows you to prioritize delivering exceptional care and ensures the highest levels of data security are upheld throughout your practice. By utilizing PBHS Secure Mail, healthcare professionals can enhance their communication efficiency while protecting sensitive information.

LuxSci is dedicated to ensuring the safety of personal information while effectively safeguarding global communications. The company focuses on delivering web and email communication services that adhere to HIPAA regulations. LuxSci develops highly secure and tailored enterprise-level environments and solutions, empowering businesses to meet their unique operational and security requirements effectively. Among the offerings are services like Secure Email, Web, and Forms, which are designed to enhance data protection and facilitate compliance. In addition, LuxSci continuously evolves its services to adapt to the changing landscape of digital security.

Sending and receiving emails that comply with HIPAA regulations has become incredibly straightforward and affordable. With MailHippo, you can easily and securely send sensitive information and attachments without needing to navigate complex setups or configurations; simply sign up and start using it right away. The platform utilizes end-to-end encryption to safeguard your emails and attachments during transmission and storage. Furthermore, MailHippo integrates smoothly with your current email address and is compatible with any email service provider. It is designed for optimal use on smartphones and tablets, enhancing its convenience for users on the go. Additionally, you receive a unique link that facilitates the secure collection of emails from anyone with ease. Don’t miss out on our exclusive Beta program, which allows you to try our secure encrypted email messaging service at no cost while enjoying the reassurance that comes with HIPAA compliance. Experience a new level of security in your communications today!

Presenting an innovative solution that allows you to tokenize your digital files straight from your email, offering a straightforward method to protect documents, videos, audio files, and more with a single click. This service enhances ownership and command over your digital assets like never before, all while integrating seamlessly into your existing email attachment process through end-to-end encryption. You can control who has permission to download, share, and view your attachments, thereby ensuring the security of your files. With real-time tracking capabilities, you can monitor who has accessed your files and whether they have downloaded, shared, or simply viewed them. The platform centralizes the management of your email attachments into one library, making it incredibly easy to keep track of vital documents. Clients are provided with a secure link for safe file exchanges, which further bolsters the security of your communications. Additionally, the option to block your device screen prevents unauthorized screenshots and copying of confidential information. Benefit from unlimited electronic signatures directly within your email, providing unparalleled convenience and protection for your documents. This comprehensive system significantly reduces the risks linked to data breaches, ransomware, and wire fraud, ensuring robust security from desktop to mobile and beyond. You will always maintain control over your files, with clarity on their origin and intellectual property rights, while enjoying peace of mind in all your digital transactions. Furthermore, the platform is designed to adapt to your evolving security needs, ensuring continuous protection as technology advances.

Mailock secure email offers companies a reliable method for sharing sensitive information with clients while protecting their data from potential breaches. It employs advanced encryption technology combined with multi-factor identity verification, ensuring that confidential emails are effectively safeguarded against cyber threats, thereby keeping customer data secure. Users can effortlessly create secure emails from their desktop or browser, utilizing specific rules and keywords that activate encryption protocols. Furthermore, they have the ability to set up authentication barriers that verify the identities of recipients, guaranteeing that only those who are authorized can access the sensitive information. Each message is accompanied by comprehensive audit trails, allowing users to track recipient engagement through instant read receipts. Recipients are also given the option to encrypt their replies at no additional charge. This service not only promotes secure communication but also empowers clients to interact with your business in a safe manner. Additionally, it streamlines the delivery of confidential documents to clients in bulk through automated secure email processes, enhancing operational efficiency. Ultimately, Mailock fortifies the integrity and confidentiality of business communications, cultivating trust and security in all client interactions while ensuring compliance with data protection regulations.

Hushmail enhances the security of your emails, web forms, and electronic signatures to ensure client confidentiality. Known for its security and HIPAA compliance, it has garnered trust among healthcare professionals globally. The setup process is straightforward, allowing you to send your first encrypted email instantly and create a secure online intake form in just a few minutes. Hushmail functions like standard email accounts while incorporating advanced security features to safeguard your information. You can send and receive encrypted messages through both web and iPhone applications. Additionally, your account can be accessed via Outlook, Apple Mail, or Android devices, making it convenient to manage your communications. Transitioning your forms to an online platform takes mere minutes with Hush™ Secure Forms, which serves as a secure substitute for traditional paper forms and offers instant online signing capabilities for your most critical documents. Switching from traditional pen and paper to e-signatures has never been simpler or more efficient. This streamlined process enhances productivity and ensures that client data remains protected at all times.

RMail®, an e-security solution offered by RPost®, emerged as a prominent global leader in the year 2000. Specializing in user-friendly email encryption, RMail provides services that ensure privacy, compliance, legal delivery proof, secure file sharing, email rights management, protection against email impostors, and overall email encryption. The transmission security services provided by RMail are particularly beneficial for professionals and organizations tasked with sending sensitive or consumer-regulated data. These offerings extend beyond the capabilities of standard email and encompass: (a) a simplified and more automated email encryption process for enhanced privacy compliance; (b) a reliable proof record detailing the sender, recipient, and content of each email; (c) confidence regarding the delivery and open status of critical emails that are time-sensitive; (d) a timestamped confirmation of content delivery; and (e) the ability to securely share large files, making RMail an indispensable tool for modern communication needs.

Echoworx stands out as a fully-managed SaaS email encryption solution by providing eight distinct methods for sending secure emails, accommodating nine different authentication methods, and offering support in up to 28 languages, which allows for safe communication across various devices and locations. Among its key attributes are multiple secure mail delivery options, including Web Portal, S/MIME, PGP, Secure PDF, Certificate Encryption, Secure Attachments (such as PDF, Office, and ZIP), as well as TLS with fallback. Additionally, it features a wide array of authentication methods like Full OAuth Access, Self-Registration, SMS, Shared Secret Passphrase, SSO, System-Generated Verification Codes, Passwordless options, and Multi-Factor Authentication (MFA) for enhanced security. Users can also benefit from a complimentary full proof of concept trial (POC) and 24/7 access to expert support, ensuring that assistance is always available when needed. The platform allows for seamless end-to-end deployment and includes options for recalling and tracking secure emails. With extensive branding capabilities and self-service account management, Echoworx is committed to providing a comprehensive and user-friendly email encryption experience. Ultimately, this combination of features empowers organizations to enhance their communication security effortlessly.

A quarter of the leading 100 German firms with the highest revenues opt for Zertificon's solutions. Our Z1 SecureMail Gateway simplifies Enterprise Email Encryption, ensuring secure communication with anyone, anytime. The entire organization can seamlessly encrypt, decrypt, manage, and verify email signatures in the background. Maintenance for the Z1 SecureMail Gateway is minimal, and the user-friendly, browser-based admin interface requires no specialized skills to operate. Automatic key management and centralized enforcement of security policies further enhance its efficiency. Quick and easy integration into either cloud or on-premises email systems means that your business operations remain uninterrupted. There is no need for employee training, and the experience for recipients is smooth and hassle-free. The Z1 SecureMail Gateway allows for centralized customization of encryption, minimizing the risk of human error. With this solution, you can swiftly achieve compliance and ensure the highest security standards. Additionally, you retain ownership of your encryption keys and benefit from German-engineered data sovereignty, free from backdoors, which enhances your organization’s trustworthiness and security posture. This comprehensive approach not only safeguards communications but also empowers your organization to focus on its core activities without security concerns.

Cryptshare is a groundbreaking solution designed to safeguard your sensitive information during its most vulnerable moments. In today’s work environment, effective communication of data and messages is essential, yet significant challenges arise when information is in transit. These challenges include: 1. Ensuring data protection 2. Restrictions on file size Our solution effectively addresses these issues in a straightforward and user-friendly way. Additionally, it provides a range of other advantages, such as: * Comprehensive audit trails * Adherence to essential data protection regulations * Strong capacity for automating business communications Moreover, Cryptshare is cost-effective, easy to implement, and can be accessed from any device that has a web browser. It complies with international standards like ISO 27001 and GDPR, ensuring your information remains secure throughout every stage of the process. Ultimately, Cryptshare empowers organizations to communicate securely and efficiently, enhancing overall productivity.

While you may think you are being cautious by refraining from sending sensitive emails, isn't it worrisome that your email service provider might have a backdoor allowing them to access your communications? They hold the power to share your messages with third parties whenever they choose, as they establish the protocols and take advantage of any weaknesses in their system. Have you reflected on the information that a single online purchase receipt could expose about your life? Such details could unveil your shopping habits, financial standing, preferred payment methods, home address, and the technology you use, among other insights. This reality is rather alarming, isn't it? Sadly, many businesses and scammers are already taking advantage of this data. Every tiny detail about you is invaluable to outside entities, who will leverage it to gain insights into your habits, sway your buying choices, and in some extreme cases, even impersonate you online. If you are under the impression that your email service is entirely secure, it may be beneficial to perform a quick online search; you'll likely uncover that leading email providers have experienced significant security breaches. Are you still feeling secure about your privacy? Fortunately, a simple and effective privacy solution is available that can protect your emails regardless of where they are sent or received, ultimately providing you with the reassurance you need in today's digital landscape. This peace of mind can help to alleviate the anxiety that comes with sharing your personal information online.

Vircom's ModusCloud is an email security solution hosted in the cloud that delivers immediate protection against threats, including phishing and advanced multilayer antivirus, along with email archiving capabilities. It ensures that users are safeguarded from harmful and unsolicited emails. Administrators have the flexibility to tailor the service to align with user needs and organizational policies. By leveraging enterprise-level security technology and infrastructure utilized by some of the world's most secure organizations, ModusCloud provides clients with robust protection. This service is further enhanced by our in-depth expertise in catering to the unique requirements of smaller businesses. Our comprehensive hosted email security solution encompasses email threat defense, email continuity through the Emergency Inbox feature, and encryption that adheres to established policies, all of which are seamlessly managed through an intuitive user interface. Additionally, this approach enables organizations to maintain their operational integrity even during unforeseen email disruptions.

Aspida Mail was created with a focus on user-friendliness, allowing you to continue your daily business activities seamlessly. Its installation is simple and works with any device that has IMAP capabilities. Furthermore, Aspida Mail offers encrypted email services that meet HIPAA compliance standards. This blend of functionalities not only enhances security but also ensures effective communication, making it an excellent option for individuals and organizations in need of reliable email services.

OpenText Core Email Message Privacy offers a robust and secure solution for organizations aiming to send emails and attachments, accommodating files as large as 100 GB per message through a web browser or Outlook, thereby eliminating the reliance on insecure cloud-sharing alternatives. Utilizing AES-256 encryption for data at rest, this service guarantees that messages are uploaded to a highly secure portal; senders retain the power to set and manage permissions for actions such as viewing, replying, and forwarding, with the ability to retract access even after the message has been dispatched. Recipients are provided with a secure link that allows them to access the messages via web or mobile devices without needing to download any additional software. Moreover, it features integrated e-signature functionality, enabling recipients to add legally binding signatures to the secure message exchange. Every action taken—including delivery confirmation, opening, downloading, and signing— is tracked in real-time and logged for comprehensive auditing. This solution not only facilitates large file transfers but also simplifies infrastructure requirements due to its SaaS-based nature, which negates the need for extra servers and integrates smoothly with single sign-on (SSO) systems. Additionally, its intuitive interface is designed to make navigation straightforward for both senders and recipients, thereby boosting overall productivity within the organization. The combination of security, ease of use, and functionality makes this service an essential tool for modern email communications.