List of the Top 25 Free Email Security Software in 2025

EasyDMARC is a comprehensive DMARC solution hosted in the cloud, designed to enhance domain security and protect email systems, thereby safeguarding organizations from phishing attacks and other threats. Brand Security Our SaaS platform dedicated to email protection effectively prevents cybercriminals from impersonating businesses to send fraudulent emails, thus safeguarding customer accounts and personal data from theft. Enhanced Email Delivery With EasyDMARC, receiving mail servers are assured of the legitimacy and authenticity of emails, which helps to ensure that important messages reach the inbox rather than being marked as spam or blocked entirely. Insight into Cyber Threats EasyDMARC offers robust monitoring of your email authentication processes and enforces strong defenses against phishing attempts, thanks to its sophisticated reporting features that provide critical insights. Prevention of Business Email Compromise (BEC) Many individuals have encountered fraudulent emails that appear to originate from high-level executives within their company. EasyDMARC mitigates the risk of business email compromise, thereby maintaining your organization's reputation at the highest standard. Additionally, EasyDMARC includes a powerful deliverability tool called EasySender, which encompasses all facets of email delivery, offering features such as email list verification, mailbox warmup, and ensuring optimal inbox placement for all outgoing communications. This comprehensive approach ensures that your emails not only reach their intended recipients but do so with the highest level of trust and reliability.

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.

Odix, recognized as a frontrunner in the Enterprise CDR (Content Disarm and Reconstruction) sector, has introduced FileWall, a dedicated cybersecurity application specifically designed for Microsoft Office 365 mailboxes. This innovative tool, FileWall™, integrates seamlessly with Microsoft security offerings such as EOP and ATP, providing comprehensive defense against unfamiliar threats posed by email attachments. Furthermore, FileWall™ maintains the integrity of sender-related security features, setting it apart from other Microsoft security solutions that may compromise these capabilities. By ensuring robust protection without sacrificing existing security measures, FileWall™ represents a significant advancement in email security.

Cloudflare serves as the backbone of your infrastructure, applications, teams, and software ecosystem. It offers protection and guarantees the security and reliability of your external-facing assets, including websites, APIs, applications, and various web services. Additionally, Cloudflare secures your internal resources, encompassing applications within firewalls, teams, and devices, thereby ensuring comprehensive protection. This platform also facilitates the development of applications that can scale globally. The reliability, security, and performance of your websites, APIs, and other channels are crucial for engaging effectively with customers and suppliers in an increasingly digital world. As such, Cloudflare for Infrastructure presents an all-encompassing solution for anything connected to the Internet. Your internal teams can confidently depend on applications and devices behind the firewall to enhance their workflows. As remote work continues to surge, the pressure on many organizations' VPNs and hardware solutions is becoming more pronounced, necessitating robust and reliable solutions to manage these demands.

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.

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.

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.

Zivver serves as an advanced digital communications platform designed to facilitate the future of secure online interactions. Its user-friendly, intelligent, and secure features make it a preferred choice for over 5,000 organizations across the globe. By effectively mitigating the risk of data breaches caused by human mistakes, Zivver ensures adherence to regulatory standards. The platform integrates effortlessly with all leading email services, such as Outlook, Gmail, and Microsoft 365. It boasts exceptional zero-keys encryption along with innovative functionalities, including context-driven machine learning to create business rules automatically. With Zivver, users can safely send large files of up to 5TB using their regular email applications. Moreover, Zivver adheres to all essential data security protocols, including ISO 27001, NTA 7516, GDPR, and HIPAA, further cementing its reputation as a trustworthy solution in the realm of secure digital communication. This commitment to security and compliance makes Zivver an invaluable asset for organizations looking to enhance their digital communication strategies.

Kevlarr offers a robust and all-encompassing DMARC monitoring and management platform tailored for Managed Service Providers (MSPs). Designed specifically for their needs, our system empowers MSPs to streamline their processes effectively. The intuitive dashboard makes it easy to establish and uphold a stringent DMARC Policy, while our advanced AI-driven filters sift through irrelevant data, ensuring that only pertinent information related to spoof emails or attacks is presented. This targeted approach allows specialists to focus solely on the data that truly matters to them or their clients, ultimately saving valuable time. Additionally, our user-friendly wizard walks you through the DMARC management steps, making the process seamless and efficient. Drawing from years of expertise in DMARC management, we highlight the domains requiring immediate attention for each client, prioritizing the most critical issues first. With this comprehensive solution, you can be confident that no important detail will be overlooked, enhancing your overall security posture.

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.

Established in 2012 by a key contributor to the DMARC specification, dmarcian is committed to enhancing global email security by making DMARC readily available through exceptional tools, educational materials, and expert assistance. Employed by thousands and endorsed by support teams worldwide, our DMARC Management Platform provides critical insights and oversight regarding the usage of your email domains. This platform equips organizations of all sizes with actionable information and alerts that facilitate the implementation of DMARC and its complementary technologies, SPF and DKIM, as well as the capability to visualize email delivery metrics and maintain a secure domain infrastructure. Addressing email security weaknesses, bolstering domain and brand reputation, and fulfilling the increasing requirements for DMARC compliance are all achievable with our top-tier services. By harnessing our offerings, businesses can navigate the complexities of email security with confidence and reliability.

Xeams is a robust and secure all-in-one email server compatible with various operating systems, including Windows, Linux, Solaris, MacOSX, and other UNIX variants. The server supports essential protocols such as SMTP, POP3, and IMAP, ensuring comprehensive email functionality. One of its standout features is a highly effective spam filtering system that can remove as much as 99 percent of unwanted emails right from the start. Additionally, its user-centric design allows for a customizable email experience, making it accessible for users of all levels. With its impressive capabilities, Xeams stands out as an excellent choice for managing email communications efficiently.

Make a wise investment today to bolster your defenses against email security threats by acquiring a robust email security solution tailored for small businesses at affordable rates. Cybercriminals are increasingly targeting high-level executives like CEOs and CFOs across various sectors, alongside crucial departments such as HR and Accounting. While Office 365 offers some level of protection, its capabilities are insufficient to effectively combat impersonations, email fraud, and phishing attacks. Relying solely on custom transport rules to block domains and guard against employee impersonations can leave significant gaps in security. PhishProtection stands out as it is compatible with all email servers, devices, and SMTP services, ensuring comprehensive protection regardless of your location or the email client you use. Whether you access your emails through your phone, Outlook, or other platforms, this solution offers top-notch security for both Android and iOS devices, making it a critical investment for safeguarding your business communications. In today’s evolving cyber landscape, prioritizing email security is not just smart; it's essential for every small business.

On average, approximately 30% of emails do not reach their intended destinations, frequently ending up in spam folders instead. To recover this lost revenue, it is beneficial to implement a sophisticated email deliverability system. The SendForensics Deliverability Score provides an innovative, predictive evaluation of the likelihood that an email will successfully reach a specific inbox. Essentially, it assesses the 'quality' of an email based on its reception by various global filtering systems, ISPs, and the recipients themselves. This score represents a crucial metric that has previously been overlooked. By examining factors such as email content, sending infrastructure, reputation, engagement history, and external resources like Microsoft SNDS*, SendForensics EDS effectively pinpoints the key issues during each evaluation, allowing users to proactively address potential challenges. This thorough methodology not only enables businesses to refine their email strategies but also plays a pivotal role in enhancing their overall deliverability rates while fostering better communication with their audience. Ultimately, improved email performance can lead to increased customer engagement and satisfaction.

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.

Strengthen your email security by eliminating malware and phishing threats while also improving your email deliverability! Protect your brand from fraudulent activities and scams, all while gaining in-depth visibility into your email processes with DMARC Analyzer. DMARC, which stands for Domain-based Message Authentication, Reporting, and Conformance, is an email validation framework created through the collaboration of major tech companies such as PayPal, Google, Microsoft, and Yahoo!. By adopting DMARC, organizations can acquire essential insights and establish control over their email communications. This powerful tool effectively shields businesses from phishing and spoofing attacks. Since the introduction of the DMARC standard in 2012, DMARC Analyzer has been at the forefront of assisting clients in navigating this landscape. Their intuitive platform simplifies the analysis of DMARC and acts as a knowledgeable consultant, guiding you toward a reject policy efficiently. With a Software as a Service (SaaS) model, DMARC Analyzer enables organizations to easily manage the complexities associated with DMARC deployment. The solution guarantees comprehensive oversight and governance across all email channels, streamlining the process for users. Ultimately, DMARC Analyzer is committed to not only enhancing your email security but also improving the overall efficiency of your operations, ensuring that your organization can thrive in a secure digital environment.

WikiLocks operates similarly to your functionality, integrating seamlessly with your frequently used applications. You begin by choosing the data you want to secure, then designate access permissions for specific individuals and groups. Once this setup is complete, you can share the newly secured document. Remarkably, no matter how the document is accessed, whether it's copied or pasted, its protection remains intact throughout its entire lifecycle, ensuring consistent security measures are upheld. This level of protection provides peace of mind when sharing sensitive information.

M365 Manager Plus serves as an all-inclusive tool for managing Microsoft 365, allowing users to report, oversee, monitor, audit, and set alerts for essential activities. It streamlines the management of services like Exchange Online, OneDrive for Business, and Skype for Business from a single interface. This software provides a vast array of pre-configured reports tailored for Microsoft 365, facilitating intricate tasks such as bulk user and mailbox management, secure delegation, and mail handling. With 24/7 monitoring capabilities, it ensures users are promptly informed via email notifications regarding any service disruptions. Additionally, M365 Manager Plus enhances compliance management through its built-in compliance reports. Furthermore, it boasts advanced features for auditing, alerting, and reporting, which are crucial for maintaining the security of your Microsoft 365 environment, ultimately making it an indispensable resource for administrators.

The Secure Email Gateway provides a powerful solution for businesses by utilizing a sophisticated array of spam filters, antivirus mechanisms, and content analysis tools to prevent unwanted emails from breaching the company’s network. Since the security needs may differ across various departments, it allows for the implementation of customized security protocols that cater specifically to the roles of employees in areas such as finance or sales. Dome Anti-spam facilitates the creation of multiple profiles, each designed with unique security features and restrictions to meet diverse organizational needs. Moreover, its containment capabilities offer protection against new threats such as ransomware and zero-day vulnerabilities. The Valkyrie file verdict system evaluates unknown files, enabling users to safely open attachments with confidence that they are protected from potential harm. Comodo's advanced containment technology ensures that all suspected threats are quarantined before they can impact endpoints, thereby eliminating the risk of malware infections from any source. This all-encompassing strategy not only bolsters security measures but also empowers employees to execute their responsibilities without apprehension regarding digital dangers, fostering a more productive work environment. The continuous evolution of these technologies will further enhance organizational resilience against future cyber threats.

Firefox Relay offers a convenient way to generate email aliases that protect your real email address from public exposure, ensuring that all incoming correspondence is redirected to your actual inbox. This functionality allows you to filter out unwanted emails, so you only receive messages that matter to you. To utilize this feature, simply sign up using your Firefox account. By distributing Relay email aliases instead of your actual address, you can effectively safeguard your inbox and maintain your personal privacy. Whenever a website prompts you for your email while browsing, the Relay icon will appear for easy access. You can track the aliases you've created by logging into the Relay dashboard. Any messages sent to these aliases will be seamlessly forwarded to your real email. If an alias begins to receive spam or other unwanted communications, you can conveniently block all emails or remove the alias directly from the dashboard, granting you full control over your email privacy. Consequently, this service enhances your online security and offers peace of mind as you navigate the web. Ultimately, Firefox Relay empowers you to take charge of your digital interactions.

Vade is a leading global provider of predictive email security, protecting 1 billion mailboxes in 76 countries. We enable Managed Service Providers (MSPs) and Small to Medium-sized Businesses (SMBs) to secure their Microsoft 365 users against complex email threats, including phishing, spear phishing, and malware. Numerous organizations, such as Internet Service Providers (ISPs), MSPs, and SMBs, choose Vade's cutting-edge email security solutions to safeguard their customers and operations from these significant cybersecurity risks. Our AI-powered tools are specifically designed to detect threats that traditional defenses frequently overlook. They successfully counteract evolving phishing attacks that bypass standard security measures, alongside targeted spear phishing and business email compromise tactics. Moreover, our technology excels at neutralizing sophisticated polymorphic and zero-day malware attacks, ensuring thorough protection for all users. By utilizing our solutions, businesses can confidently address the intricacies of email security while maintaining peace of mind. Our commitment to innovation ensures that we stay ahead of emerging threats in the ever-evolving cybersecurity landscape.

INKY is a renowned cloud-based solution for email security that has been recognized with multiple awards. It effectively safeguards organizations from phishing threats while also filtering out spam and malware. By leveraging advanced domain-specific machine learning and computer vision techniques, INKY is capable of detecting and neutralizing zero-day phishing attempts, ensuring they do not infiltrate traditional email systems. For emails deemed suspicious, the software displays warning banners to alert users. Its integration with Office 365 can be accomplished in just a few minutes, making it a swift addition to any organization. The system provides Safe, Unusual, and Malicious alerts, helping users discern the appropriate actions to take with their messages. Furthermore, INKY features a comprehensive dashboard that allows for complete oversight and monitoring of blocked threats. The email security solution enhances user protection by embedding clear warnings within emails, providing tailored advice to help users stay informed. These Safe, Unusual, and Malicious alerts come complete with detailed information, prompting users to scrutinize their emails further or to exercise caution. Clients particularly appreciate the ease of reporting suspicious emails with a single click, reinforcing the software’s user-friendly design and effective security measures. Overall, INKY not only protects businesses but also empowers users with knowledge and tools to navigate their inboxes safely.

Email Shield is a cloud-based security enhancement designed to safeguard email accounts across various sectors, such as banking, fintech, and eCommerce. By verifying and monitoring trusted contacts, it empowers users to identify potentially harmful emails while securing financial transactions. This tool enables accounts payable agents (AP) to review emails, recipients, and attachments, granting them the ability to approve, escalate, reject, or accept payments and request modifications to account details. Additionally, the system alters personal information within active messages, including the subject line, content, and sender details. Consequently, this functionality serves as a robust defense against wire fraud, vendor fraud, and other financial scams, enhancing overall security measures for businesses.