Best Free Email Encryption Software of 2025

PowerDMARC is a robust email security solution that safeguards your brand reputation and email communications from threats like spoofing, phishing, and ransomware. By leveraging advanced technologies such as DMARC, SPF, DKIM, BIMI, MTA-STS, and TLS-RPT, PowerDMARC empowers you to protect your email infrastructure. With a user-friendly platform, PowerDMARC simplifies complex configurations, enabling you to easily manage and monitor your email security posture. AI-powered threat intelligence provides valuable insights to proactively identify and mitigate emerging threats. Trusted by over 2000 organizations globally, including Fortune 100 companies and governments, PowerDMARC is your trusted partner in securing your email infrastructure.

Mailfence is an encrypted email provider that uses OpenPGP-based encryption and digital signatures. Mailfence offers a variety of features that allow for collaboration without compromising security or convenience. Mailfence documents allows you to securely store and edit documents. You can also share documents with your team by pressing a button. Mailfence calendar will help you keep track of all your tasks, meetings, events, and other important information. Mailfence contacts will save your contacts and allow you to create mailing lists to maximize efficiency. Mailfence was designed to be fully interoperable. This means that you can sync Mailfence with any service. Mailfence offers fully customizable whitelabel versions for its Mailfence interface. Mailfence donates 15% from PRO subscriptions to IFF or EDRI to support the fight for Online privacy.

Spike integrates all your workspace into one Inbox. This includes email, chat and calendar, calls, team collaboration, tasks, calls, and even calls. You can now do your work in one feed so you don't have to switch between apps. Spike's conversational email merges traditional email with instant messaging, eliminating cluttered email threads. Live collaboration and real-time communication allow for better interactions and a more human communication environment. Spike is available for iOS, Android, Mac and Windows.

Tuta provides a privacy-focused email service that guarantees end-to-end encryption, securing all your data from unauthorized access. Featuring quantum-safe cryptography, Tuta protects your communications with the highest standards of security. Its intuitive apps for Android, iOS, and desktop ensure an easy and efficient experience for users, with no ads and complete privacy. Tuta also supports custom domains for professional use and remains committed to sustainability by using 100% renewable energy for its operations.

Effortlessly generate an unlimited number of email addresses, each linked to its own set of contacts, while maintaining the confidentiality of your actual email account. You can share these addresses with others, ensuring that your personal email remains protected from telecom companies, governmental entities, and cybercriminals who may want to monitor your communications. Each virtual mailbox comes with robust 4096-bit GPG and S/MIME encryption keys and certificates, guaranteeing that all emails stored within MsgSafe-io are secure and encrypted. You have the capability to customize the encryption settings for each individual contact you interact with. Safeguard your entire family or organization by overseeing all identities and email addresses associated with your existing domain. If you're lacking a domain, our domain registration services allow you to acquire one that seamlessly integrates with MsgSafe-io along with the necessary privacy safeguards. Concerned about the privacy of services like FaceTime, Skype, Duo, or Hangouts offered by major corporations such as Apple, Microsoft, and Google? Opt for our secure and private audio and video communication tools instead, where you can invite others to connect with you via a simple browser link. This way, you can enhance both your security and privacy during online interactions.

Atomic Mail is a privacy-focused email hosting service that prioritizes user security while delivering a seamless email experience. It offers a range of features including the ability to create multiple email aliases for enhanced privacy, ensuring a spam-free environment with no advertisements, and providing email password protection. Additionally, Atomic Mail incorporates end-to-end encryption, allowing only you and your designated recipient to access the contents of your messages. The service guarantees zero access encryption, meaning Atomic Mail itself cannot view your emails, thus upholding your privacy. Furthermore, account recovery is simplified through the use of a unique seed phrase, enabling you to regain access to your account without sacrificing security. This combination of features makes Atomic Mail a reliable choice for individuals who value both privacy and ease of use in their email communications.

Security Gateway's email threat detection technology was developed by MDaemon Technologies. This email industry pioneer has been protecting email servers against viruses, spam, phishing and other threats for more than 20 years. Our expertise is trusted by companies to keep their email communications safe. We protect all email platforms, including Microsoft Exchange, Office 365, and other. Our team of email security specialists will take the hassle out of managing your company’s email security. Security Gateway employs the most up-to-date email threat detection technology and policy enforcement tools in order to ensure good emails flow to and from your users. Security Gateway cloud service is easy to deploy, so you can focus on other important tasks. Check out this video to see some of the Security Gateway features.

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Send and receive encrypted emails that comply with HIPAA and GLBA requirements. Protected Trust Email Encryption has been rebranded as Send It Secure by Protected Trust. You might remember us as either Protected Trust Email Encryption or simply Protected Trust. With the expansion of our email encryption capabilities and an increase in our service offerings, we felt it was the perfect moment to introduce a new identity for our email encryption product. This rebranding aligns with our commitment to providing a trusted product in the market, and we are thrilled to enhance your experience with improvements tailored to your needs. Acknowledged as a leading solution for the secure transfer of sensitive information, we prioritize your trust and the safeguarding of your data. We're eager to share our refreshed email encryption solution, Send It Secure by Protected Trust, and look forward to supporting your secure communication needs more effectively than ever before.

Who has access to your emails? In the case of traditional emails, they can be viewed by you, the recipient, all email service providers, and potentially others. However, with end-to-end encryption, only the sender and intended recipients have the ability to read those messages. The iOS application Letterbox simplifies the use of end-to-end encryption, is compatible with a majority of email services, and utilizes the standard encryption protocol OpenPGP. While Letterbox functions similarly to other common email applications, it highlights the security status of both incoming and outgoing messages, allowing users to differentiate between confidential and insecure emails. As a free open-source email client on iOS, Letterbox is part of an ongoing research initiative at Freie Universität Berlin. Though still under development, users will soon be able to access the app on their devices through Apple's TestFlight platform, ensuring that secure communication is more accessible than ever. This advancement aims to enhance user awareness regarding email security while providing a user-friendly experience.

Encyro offers secure file storage, encrypted email and electronic signatures. Encyro's award-winning design makes it easy for you and your clients. Clients don't have to sign up for portal accounts. File sharing and encrypted messaging Encyro allows you to send directly to any email address. Encyro protects your data both during transmission as well as storage to ensure that you are in compliance with HIPAA and other compliance standards such as the GDPR, FINRA and SOX. Securely receive via your custom-branded upload page. Clients do not need to log in or go through additional steps. Electronic Signatures Encyro esignatures are designed for remote signing to protect your transaction. You can control the login options as well as the type of signature to ensure that only the right person is signing. Encyro offers custom branding, automated reminders, re-usable templates for e-sign, and re-usable Encyro e-sign templates. Access codes that comply with NIST-8006363 can be sent by SMS or text for additional security.

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.

When you need to swiftly share a confidential file or email with a customer, partner, or employee outside your organization and beyond the secure network, it is crucial to follow best practices. The CNIL strongly recommends that businesses and organizations implement data encryption during transfers and ensure personnel are educated about potential risks. Data encryption plays a vital role in contemporary data protection strategies. By utilizing specialized encryption solutions such as BlueFiles, companies can transform their data into a format that is unreadable to anyone except the intended recipient. BlueFiles offers a solid guarantee for all your digital data transfers, ensuring file integrity, complete confidentiality, remote file control, and tracking capabilities. This method not only saves time and enhances user experience but also reduces costs, allowing for secure communication over the Internet without the threat of sensitive data exposure. Additionally, under GDPR regulations, organizations must take proactive measures to encrypt personal data transfers to avoid severe penalties, emphasizing the importance of compliance in today’s digital landscape. By adopting these practices, businesses can foster trust and security in their communications.

Security experts have created a one-stop E2E encrypted platform. Crypto Suite™, is the only crypto app you need. This app is the most secure for all your crypto needs. All your private and valuable stuff in one place. Communications, cryptocurrencies, and private files. Blockchain integration and end-to-end encryption ensure that you are in complete control. It's easy to manage your crypto. FortKnoxster is your one-stop secure platform. It is easy to share crypto and to invite your friends. FortKnoxster's wallet is completely non-custodial. Only you have access to your funds. We do not have access to your funds, nor does anyone else. Only you have the private encryption keys to your money. All your tokens and coins can be stored in one secure mobile wallet. We support multiple blockchains, and thousands of assets. BTC, ETH and FKX, ERC20 or BEP20, NFT collectibles, and other assets can be purchased at your own terms.

Safeguard the confidentiality of your electronic communications by utilizing gpg4o®, an innovative solution crafted by Giegerich & Partner, which leverages OpenPGP—one of the most trusted and widely adopted encryption methods globally. Designed for both individual and corporate users, gpg4o® ensures that your emails remain private through robust encryption capabilities. This seamless integration with Microsoft® Outlook® 2010, 2013, 2016, and 2019 allows you to enhance your email security effortlessly. The installation process is straightforward, and the user-friendly interface makes it easy to maintain email privacy. Additionally, with ongoing product updates, gpg4o® continuously provides the latest features to bolster security and improve overall user experience, ensuring that your sensitive information is always protected. In a world where email breaches are common, taking proactive measures to secure your correspondence is more important than ever.

iionLife, developed by iionHealth, serves as a complimentary patient portal tailored for professionals in behavioral health. This effective, fully HIPAA-compliant platform allows practitioners to enhance the care they provide beyond traditional office settings. With features like standardized assessment instruments such as the PHQ-9, it supports comprehensive tracking of patient outcomes, journaling, monitoring of activities, and secure messaging capabilities. Additionally, it encompasses valuable tools such as Community of Care, Care Plan, Reference Library, and Accounting, making it a versatile resource for both providers and patients. The platform not only streamlines communication but also fosters a more engaged patient experience.

We prioritize user anonymity by not retaining personal information, ensuring that your identity remains concealed. Our robust encryption and cutting-edge technologies protect the privacy of your communications. Iceland boasts some of the most stringent privacy regulations, facilitating both anonymous use and the prompt deletion of data. CTemplar's unique 4-Wall Protection system provides comprehensive security for your information. You can set a designated phrase in your account to help identify and prevent phishing attempts. Additionally, we offer anonymous payment options through Monero, although our payment processor for XMR is still in development, necessitating support contact for such transactions. For convenience, automatic payments can also be carried out using Bitcoin and credit cards. Our servers are situated in Iceland, where we benefit from abundant renewable energy resources, operating entirely on green energy sourced from geothermal and hydropower. This commitment to sustainability enhances our service while contributing positively to the environment.