List of the Top 18 Free Email Encryption Software in 2025

PowerDMARC is a powerful email security solution designed to protect your brand's reputation and email communications from various threats such as spoofing, phishing, and ransomware attacks. Utilizing cutting-edge technologies like DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT, PowerDMARC ensures the safety of your email infrastructure. The platform is designed with user-friendliness in mind, making it easy to manage and monitor your email security measures without dealing with complex configurations. Furthermore, its AI-driven threat intelligence offers critical insights that help in the proactive identification and mitigation of potential threats. With the trust of over 2000 organizations worldwide, including many Fortune 100 companies and government entities, PowerDMARC stands out as a reliable partner in securing your email systems. By choosing PowerDMARC, you invest in a secure future for your email communications and brand integrity.

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.

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.

Proton Mail was established in Switzerland, where all of our servers are situated, ensuring that user data is safeguarded by stringent Swiss privacy regulations. Every email sent is automatically secured through end-to-end encryption, meaning we, too, are unable to read or decrypt your messages. As a result, your encrypted emails are protected from being shared with any external parties. To set up your secure email account, there is no requirement to disclose personal information, and we do not maintain IP logs that could potentially identify your anonymous account. The importance of your privacy is our top priority. We believe that email privacy should be a right accessible to everyone, which is why our code is open-source and basic accounts for Proton Mail are offered free of charge. We encourage users to support our initiative by donating or choosing to upgrade to a premium account. Proton Mail is designed to work seamlessly across all devices without the necessity of additional software installation. For those running a business, Proton Mail Business offers the ability to maintain your professional email address, allowing you to send and receive encrypted communications both internally and externally. Our commitment to privacy and security remains unwavering as we strive to empower users with safe communication options.

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.

Secure email communication is a fundamental right for everyone, and Tutanota emerges as the leading choice, crafted with user-friendliness and privacy as its core principles. By creating a free account, you can take charge of your inbox once more. With state-of-the-art features such as end-to-end encryption and two-factor authentication, the level of email security is unmatched. Its integrated encryption guarantees that your mailbox remains exclusively yours, safeguarding your data from unauthorized access and interpretation. Being open source not only fosters transparency but also allows security experts to review the protective code, thereby bolstering confidence in its safety. Our Android app operates independently of Google services, establishing Tutanota as the top open source email solution. Available on both iOS and Android platforms, your secure communications are perpetually accessible. Our fast web client and extensive applications ensure a smooth process for sending encrypted emails. We are committed to your email privacy by offering an ad-free service, relentlessly striving to enhance encryption so you can focus on what is most important. With a clean and simplistic interface complemented by customizable features, Tutanota is resolutely focused on fulfilling your email needs effectively, ensuring a secure and user-centered experience. This commitment to privacy and usability sets Tutanota apart in the crowded email landscape.

Effortlessly create an endless array of email addresses, each associated with its own list of contacts, all while ensuring the privacy of your actual email account. These addresses can be shared freely, keeping your personal email shielded from telecom companies, governmental agencies, and cybercriminals who might seek to surveil your communications. Each virtual mailbox is equipped with advanced 4096-bit GPG and S/MIME encryption keys and certificates, ensuring that every email stored within MsgSafe-io remains secure and encrypted. You also have the option to tailor the encryption settings for every single contact you engage with. Protect your entire family or organization by managing all identities and email addresses linked to your current domain. If you don't yet own a domain, our domain registration services can help you secure one that integrates effortlessly with MsgSafe-io, complete with essential privacy protections. If you have concerns about the privacy of communication services like FaceTime, Skype, Duo, or Hangouts from major companies like Apple, Microsoft, and Google, consider using our secure and private audio and video communication platforms instead. With these tools, you can invite others to join you through a simple browser link, enhancing both your online security and privacy. This approach not only fortifies your communications but also offers peace of mind in a digital age where privacy is increasingly at risk.

Atomic Mail prioritizes user privacy as an email service provider, offering features such as the ability to create multiple aliases, strong security protocols, and an easy account recovery system. By generating various email aliases, users can better protect their personal information. With zero spam and no advertisements, the service enhances user experience significantly. It also includes email password protection and employs end-to-end encryption, ensuring that only the sender and recipient have access to the content of their messages. Notably, with Zero Access Encryption, Atomic Mail does not have the ability to read your emails. Additionally, users can recover their accounts using a unique seed phrase, allowing them to regain access without sacrificing security measures. This comprehensive approach to privacy and security makes Atomic Mail a reliable choice for individuals who value their online communications.

MDaemon Technologies has created the email threat detection technology utilized by Security Gateway. For over two decades, this trailblazer in the email industry has been safeguarding email servers from various dangers like viruses, spam, and phishing. Organizations rely on their expertise to maintain the security of their email exchanges. Their protection extends to all email platforms, such as Microsoft Exchange and Office 365, among others. With a dedicated team of email security experts, Security Gateway simplifies the management of your organization’s email security needs. Utilizing the latest advancements in email threat detection technology and policy enforcement tools, Security Gateway ensures that legitimate emails are efficiently delivered to and from your users. Additionally, the cloud service offered by Security Gateway is straightforward to implement, allowing you to concentrate on other vital responsibilities. To learn more about the functionalities of Security Gateway, be sure to check out this informative video.

Introducing Canary, your new AI assistant for email management that not only sends your messages but also identifies important ones, filters out spam, and offers a variety of additional features. With Canary, you can enhance your email experience and keep your inbox organized like never before!

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.

Who can access your emails? With traditional emails, you, the recipient, and all email service providers may have visibility into the contents, along with potential others. In contrast, end-to-end encryption restricts access solely to the sender and the intended recipients, ensuring greater privacy. The iOS app known as Letterbox enhances the end-to-end encryption experience, supporting a wide range of email services and employing the widely recognized OpenPGP encryption protocol. Although Letterbox operates like many other email applications, it specifically emphasizes the security status of both incoming and outgoing communications, empowering users to identify which emails are secure and which are not. Being a free and open-source email client for iOS, Letterbox aligns with an ongoing research project at Freie Universität Berlin. While it is still in development, users will soon have the chance to try the app on their devices via Apple's TestFlight platform, making secure communication increasingly available to the public. This development not only aims to improve user understanding of email security but also strives to maintain a seamless and intuitive user interface. As technology evolves, the importance of secure communication will only continue to grow.

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.

Security professionals have developed an all-in-one platform featuring end-to-end encryption, known as Crypto Suite™, which serves as your sole application for cryptocurrency management. This app stands out as the most secure option available, allowing you to keep all your sensitive and important information in one convenient location, encompassing communications, digital currencies, and private documents. With blockchain integration and robust end-to-end encryption, users maintain total control over their assets. Managing your cryptocurrency is straightforward, making FortKnoxster your ultimate secure solution. Sharing digital currencies and inviting friends to the platform is a seamless process. The wallet provided by FortKnoxster operates on a completely non-custodial basis, meaning only you can access your funds. Neither the platform nor any third parties have access to your assets, as you alone possess the private encryption keys to your money. All of your tokens and coins can be securely stored in a single mobile wallet, with support for numerous blockchains and thousands of different assets. Whether it’s BTC, ETH, FKX, ERC20 or BEP20 tokens, NFT collectibles, or various other digital assets, you can purchase them on your own terms and conditions. By utilizing this comprehensive platform, you can enhance your cryptocurrency experience while ensuring top-notch security and privacy.

Protect the privacy of your electronic communications by employing gpg4o®, a cutting-edge solution developed by Giegerich & Partner that utilizes OpenPGP—renowned for being one of the most reliable and popular encryption standards worldwide. Tailored for both personal and business users, gpg4o® guarantees that your emails stay confidential through its strong encryption features. It integrates smoothly with Microsoft® Outlook® versions 2010, 2013, 2016, and 2019, allowing you to enhance your email security with ease. The installation is simple, and its intuitive interface makes it effortless to safeguard your email communications. Furthermore, gpg4o® is regularly updated, ensuring that you have access to the latest enhancements to strengthen security and improve the overall user experience. With the prevalence of email breaches in today's digital landscape, taking proactive steps to secure your communications is crucial for protecting sensitive information. By utilizing such advanced tools, you can confidently engage in email conversations while minimizing the risk of unauthorized access.

iionLife, created by iionHealth, is a free patient portal specifically designed for professionals in the field of behavioral health. This robust platform is fully compliant with HIPAA regulations, enabling practitioners to extend their care beyond conventional office interactions. It includes features like the PHQ-9 standardized assessment tool, facilitating thorough monitoring of patient outcomes, journaling, activity tracking, and secure messaging options. Furthermore, it offers additional resources such as Community of Care, Care Plan, Reference Library, and Accounting, making it an invaluable asset for both healthcare providers and patients alike. By improving communication channels, the platform encourages a more interactive and engaged experience for patients, ultimately enhancing their overall care. Additionally, its versatile features can significantly contribute to the efficiency of behavioral health practices.

When it comes to efficiently and securely sending confidential files or emails to customers, partners, or employees outside the safe boundaries of your organization, adhering to best practices is vital. The CNIL strongly advises companies to "utilize data encryption during transfers" and "ensure that employees are educated about the risks involved." In today’s landscape of data protection, implementing encryption is not merely advisable but essential. Tools such as BlueFiles provide specialized encryption to safeguard data, making it inaccessible to anyone other than the intended recipient. BlueFiles enhances the reliability of digital data transfers by incorporating integrity checks, ensuring complete confidentiality, allowing remote file control, and offering tracking capabilities. By utilizing these advanced tools, organizations can boost efficiency, streamline operations, and cut costs, all while maintaining secure communications over the Internet and safeguarding sensitive information. Additionally, compliance with GDPR regulations necessitates that organizations actively encrypt personal data flows to prevent facing severe penalties. Therefore, adopting these measures not only fortifies data protection but also ensures alignment with regulatory requirements, fostering a more secure digital environment. Ultimately, this proactive approach to data security can significantly enhance an organization's reputation and trustworthiness.

We place a strong emphasis on maintaining user anonymity by not storing personal data, which guarantees that your identity stays private. Our advanced encryption and state-of-the-art technologies safeguard the privacy of your communications effectively. Iceland is known for having some of the most rigorous privacy laws, which support both anonymous usage and the swift deletion of data. The unique 4-Wall Protection system offered by CTemplar ensures that your information is thoroughly secured. To further enhance security, you have the option to set a specific phrase in your account that aids in recognizing and avoiding phishing attempts. Furthermore, we provide anonymous payment solutions via Monero; however, please note that our payment processor for XMR is currently under development, so you will need to contact support for assistance with these transactions. For added convenience, automated payments can also be processed using Bitcoin and credit cards. Our servers are located in Iceland, harnessing the benefits of plentiful renewable energy resources, as we operate exclusively on green energy derived from geothermal and hydropower sources. This dedication to sustainability not only improves our service but also positively impacts the environment, fostering a greener future. Additionally, our commitment to energy efficiency aligns with global efforts to combat climate change, making us a responsible choice for environmentally-conscious users.