List of the Top 18 Secure Email Gateway Software with a Free Trial in 2025

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.

N-able Mail Assure is a cloud-based solution for email security that delivers sophisticated protection against threats for both incoming and outgoing emails, utilizing collective threat intelligence, a comprehensive email archive, and round-the-clock email continuity services. The platform features multi-tenant web interfaces equipped with preset configurations, detailed reporting, and visual tools that enhance oversight and management of all email transactions. This innovative system employs proprietary technology that analyzes extensive email data to enhance its Intelligent Protection and Filtering engine. By incorporating real-time threat pattern detection and leveraging a diverse array of filtering technologies, N-able Mail Assure effectively safeguards users from spam, viruses, phishing attempts, impersonation, malware, and various other email-related dangers. Additionally, its seamless integration and user-friendly interface ensure that organizations can maintain robust email security with minimal effort.

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.

The Barracuda Email Security Gateway delivers comprehensive defense against various incoming threats such as malware, spam, phishing, and Denial of Service attacks, thereby preserving business operations from email-related disruptions. With its flexible and robust policies, it meticulously enforces diverse regulations related to incoming emails. In today's digital landscape, where email is crucial for commerce, any interruption to the email server can significantly impede business activities. Moreover, the Barracuda Email Security Gateway includes a Cloud Protection Layer at no additional charge, enabling email spooling for up to 96 hours and allowing for traffic redirection to alternative servers if required. To enhance the protection of sensitive data, it utilizes advanced encryption technologies that block unauthorized access from external sources. Additionally, the outbound filtering and quarantine functionalities ensure that all outgoing communications comply with the company's data loss prevention measures. This thorough strategy not only protects against external threats but also strengthens internal compliance protocols, making it an indispensable asset for any organization. By integrating such a multifaceted approach, companies can maintain their reputations and operational integrity in an increasingly perilous cyber environment.

Sending and receiving digitally signed encrypted emails has become simpler than ever before. The Secure E-Mail Gateway (SEPPmail), utilizing its innovative GINA method for spontaneous encryption, is capable of safeguarding email communications for both small and large enterprises at the highest security levels. This solution requires very little effort and is user-friendly for both the sender and the recipient. SEPPmail’s all-encompassing Secure Email solution establishes new benchmarks in email communication that adheres to GDPR compliance. Recognized as a premier email encryption and signature solution, SEPPmail encompasses all essential features to protect sensitive data transmitted via email, while also ensuring the sender's authenticity and maintaining the confidentiality and integrity of the message. Additionally, the modular architecture of this secure email gateway enables customization to cater to specific customer requirements and allows for effortless expansion. As such, businesses can confidently rely on SEPPmail to enhance their email security protocols.

Efficiently categorize deceptive emails while proactively detecting and isolating questionable URLs. Utilizing big data analytics enables precise classification of mass email communications. This comprehensive solution integrates seamlessly with both Google Workspace and Microsoft 365. Spambrella's Email Security and User Awareness Training technology is trusted by numerous leading security-focused organizations worldwide, spanning various industries and regions. By partnering with Spambrella, you can consolidate your email security strategies and user training initiatives on an international scale. Acting as your dedicated email security team, Spambrella ensures a smooth transition while possessing the technical know-how of other major providers like Symantec.cloud, Mimecast, and MxLogic. To safeguard your email users from potential threats, reach out today to arrange a demonstration with our cybersecurity specialists and enhance your email protection strategy.

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.

An additional layer of security has been established to block potential threats from infiltrating users within the network. This system is meticulously crafted to protect email communications, which are frequently the most vulnerable to cyberattacks. ESET proudly offers a true 64-bit product that accommodates clustering, ensuring that organizational speed remains efficient regardless of size. ESET Mail Security solutions incorporate a unique blend of anti-spam, anti-phishing, and host server protection, utilizing machine learning, comprehensive data analysis, and expert insights within an award-winning mail security framework. This advanced functionality significantly diminishes both unsolicited emails and targeted threats, allowing employees to focus on their tasks while maintaining uninterrupted business operations. Users are often confronted with phishing attempts that can carry additional malicious components, highlighting the necessity for a cohesive email security strategy. Depending on individual users to identify genuine emails can be an inefficient method, as they may quickly become overwhelmed by this responsibility. To ease this challenge, users are automatically alerted about spam emails that are quarantined, thereby improving their capability to manage their inboxes with greater efficiency. Furthermore, these notifications ensure that legitimate communications are not overlooked amidst the clutter of spam.

Explore a secure and intuitive platform tailored for the safe transfer, retrieval, and signing of sensitive documents, allowing for file sizes of up to 2.5G per email while safeguarding confidential information within and beyond your organization. Our innovative technology enables users to bolster the security of their email communications by implementing various control mechanisms, such as limiting the number of times a document can be accessed, establishing expiration dates, and utilizing SMS codes and passwords to ensure smooth delivery to recipients. In today's increasingly precarious digital environment, choosing a groundbreaking and reliable solution is vital for effective digital security. Whether you need to send or receive emails with large confidential attachments or require documents to be signed, our platform is fully equipped to facilitate the safe exchange of sensitive information, including passwords, credit card numbers, financial records, tax documents, incident reports, and any other confidential data intended for email sharing. With our advanced technology, you can confidently address the security needs and requirements of your organization, ensuring that your sensitive information remains protected throughout the entire process. Embrace the future of secure communication and enhance your organization's data protection strategies today.

Having the capability to modify and remove messages, along with the option for automatic deletion, clearing chat histories, and fully erasing all records is crucial. Users are empowered to disconnect devices remotely, employ a deceptive secret phrase, and activate features such as auto-lock and auto-logout during periods of inactivity. There are functionalities to conceal contacts and establish blacklists, as well as customized visibility options for individual contacts, enabling precise configuration of contact permissions. Furthermore, tasks can be delegated to both oneself and team members, with mechanisms in place to monitor progress and ensure accountability. Users also have the ability to securely store and manage their passwords, sharing them with selected contacts as needed. Enhancing collaboration is further supported by setting team objectives and tracking the resolution of various challenges, which cultivates a more effective work atmosphere. Overall, this extensive suite of features greatly enhances both communication and organizational capabilities within any group setting, leading to improved teamwork and efficiency.

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.

In the fast-changing environment of email security threats, growing businesses need a forward-thinking approach that not only tackles existing dangers but also anticipates future risks. Sophos Email harnesses the advanced technology from our well-regarded Intercept X, utilizing deep learning neural networks to effectively counteract zero-day malware and harmful applications. This solution is equipped with the most advanced anti-ransomware strategies available. By implementing behavioral analysis, Sophos Email can identify and mitigate ransomware and boot-record attacks that have yet to be encountered. Furthermore, its time-of-click URL protection assesses the reputations of email links both prior to delivery and at the time of access, successfully blocking elusive, delayed attacks that might slip past other email security measures. Capable of handling millions of emails each day, Sophos Email draws on the latest threat intelligence from the SophosLabs global network, ensuring your email gateway remains steadfast against a constantly evolving array of threats. Thus, businesses can work with increased assurance, backed by cutting-edge technology designed specifically for the challenges of today and tomorrow. In summary, the proactive measures provided by Sophos Email not only safeguard current operations but also empower organizations to embrace growth without compromising security.

Protecting communications through email encryption is essential, as the majority of emails are sent in unencrypted plain text, making their content vulnerable to anyone who has access to the data stream. This vulnerability poses significant risks for businesses, organizations, and institutions, potentially leading to violations of legal standards. To improve security and build trust in electronic communications, CipherMail functions as a central mail transfer agent (MTA) utilizing a “store and forward” system. It temporarily retains incoming messages from both internal and external sources until they are either encrypted or decrypted, allowing for smooth delivery to the recipient without altering the email client or interfering with any SMTP server. CipherMail supports various email encryption techniques, including S/MIME and PGP, and can even embed encryption within PDF files, with activation based on certain triggers like keywords in the email subject line. In addition, CipherMail features a Data Leak Prevention (DLP) module that offers an extra layer of security against unauthorized data leaks. This thorough approach to email security not only safeguards sensitive information but also bolsters the overall reliability of electronic communications across numerous platforms, ensuring that users can confidently share information without fear of interception. The combination of these advanced features positions CipherMail as a leader in the realm of email security solutions.

RevBits Email Security is an advanced solution designed to fill significant voids in the email security landscape. Utilizing innovative algorithms, including a cutting-edge page impersonation detection technique, it ensures an unparalleled level of email scrutiny. Each email is assigned a composite probabilistic score, providing valuable insights and fostering ongoing user education. Furthermore, this robust security tool enhances the overall email security framework by identifying and thwarting sophisticated malicious emails that may bypass existing protections. Ultimately, RevBits Email Security safeguards employee endpoints, which represent the final line of defense in email interactions. This proactive approach not only defends against threats but also empowers users with essential knowledge for better security practices.

Provides a strong defense against the intricate email threats that are common today, while also featuring extensive policy management along with thorough data security and compliance functionalities. Protecting your email infrastructure from various issues such as spam, malware, phishing schemes, business email compromise, account takeovers, and ransomware should be an essential priority. Trustwave's Secure Email Gateway (SEG) utilizes a multi-faceted intelligence and detection framework that performs a detailed assessment of incoming email traffic in real-time, guaranteeing that your users remain safe from cyber hazards. Additionally, it facilitates the smooth integration of email content workflows into your organizational practices and vigilantly supervises outgoing emails to prevent potential breaches involving sensitive data, trade secrets, confidential documents, and financial information. By implementing these security solutions in conjunction with the Secure Email Gateway, you significantly enhance your organization's protective measures and compliance protocols. This holistic strategy not only fortifies your email security but also optimizes your organizational workflows, ensuring that protection and efficiency go hand in hand. Consequently, your organization can confidently navigate the digital landscape while minimizing risks associated with email communication.

Approximately one-third of businesses that experience a data breach see a reduction in revenue, with email consistently being the most targeted avenue for attacks. Safeguard your email systems with ClrStream, a thorough security and continuity solution compatible with platforms like MS Exchange, Office 365, MDaemon, Postfix, Postmaster, and Zimbra. Alarmingly, 88% of organizations experience data loss, with email often being the leading cause of these incidents. ClrStream operates as an email scrubbing service that protects against Malware, Ransomware, Viruses, and Spam, while also ensuring low latency for email delivery and reducing the rate of false positives. This solution serves as an external safeguard against DDoS attacks, providing an additional layer of security. Additionally, it offers email continuity when the main mail server is down or unreachable, incorporating built-in redundancies and scalability that eliminate the need for a mail parking service. As a cloud-based SaaS solution, ClrStream not only helps reduce bandwidth congestion but also streamlines management duties for organizations. By implementing this powerful solution, companies can significantly bolster their email security and enhance their ability to operate smoothly under adverse conditions. In today's digital landscape, investing in such protective measures has never been more crucial for maintaining trust and reliability with clients.

Introducing the ultimate file security solution that ensures the complete protection of files entering your organization. Unlike conventional detection-based systems that only spot and block potentially harmful content, Positive Selection is dedicated to pinpointing the safe elements within every file, guaranteeing that all files delivered to your enterprise are fully secure. This comprehensive approach is applicable to any file, at any time, and from any source. Votiro’s Secure File Gateway possesses in-depth knowledge of various file types, allowing it to effectively neutralize threats across a vast range of files, regardless of their entry point into your organization. By adopting this state-of-the-art solution, businesses can confidently operate, secure in the knowledge that their data is safeguarded against potential risks. This innovation not only enhances security but also fosters a more efficient workflow within the organization.

ePrism offers unparalleled email security designed to defend against both external and internal risks such as spam, viruses, spyware, and phishing attacks. Additionally, it safeguards against identity theft and other harmful content. Our solutions feature top-tier inbound and outbound spam filtering, policy categorization, and seamless automated directory integration within a hosted SaaS framework that can be set up instantly without requiring any hardware or software installation. Our team of technical specialists at EdgeWave actively monitors and manages threats to ensure they do not infiltrate your internal servers. Among the standout features are advanced threat protection, intelligent threat management, data loss prevention, compliance measures, disaster recovery options, detailed policy controls, account management capabilities, and comprehensive visibility and reporting tools. Furthermore, clients can enhance their security through optional add-ons such as ThreatTest for anti-phishing and incident response, Email Continuity services, email encryption solutions, email archiving, and data loss prevention (DLP) capabilities to ensure a robust defense against potential threats.