As of May 2026, there are 16 SaaS companies in Secure Email Gateway Software. They have combined revenues of $128.3M and employ 821 people. They have raised $107.9M and serve 5.7K customers combined.
Secure Email Gateway Software provides organizations with a robust solution to protect their email communications from threats such as phishing, malware, and spam. This software serves as a barrier between their email systems and the external internet, ensuring that only legitimate and safe emails reach the inboxes of users. Key features typically include threat detection, spam filtering, malware filtering, and content policy enforcement, all aimed at mitigating the risk of email-based attacks. The primary use case for Secure Email Gateway Software is to enhance email security for enterprises that heavily rely on email for communication and transactions. It is crucial for roles in IT security, compliance, and risk management to safeguard sensitive information and maintain regulatory compliance. By deploying this software, organizations can facilitate secure collaboration while protecting against data breaches and business email compromise.
Sorting: Highest -> Lowest
Showing 10 of 5 companies ranked by annual revenue.
Hem, France
Developer of a predictive email defense platform intended to improve email security. The company's platform leverages artificial intelligence, fed by data from 600 million mailboxes, to detect threats such as spam, malware and phishing links and block them in real-time, enabling enterprises to filter threat emails and increase their security.
München, Bayern, Germany
Digital transformation is changing processes and supply chains, products and companies, entire industries and markets. Retarus supports businesses, enabling adaptation to these changes. With cloud services for digital business communication that enable the efficient and secure exchange of information. For people, applications, and machines. This is how more efficient business processes are developed. Processes that work better, are more flexible, agile, and transparent. Technological advances are changing day-to-day business. Everywhere. And faster than ever. Companies must act, adapt their processes, use innovation to enhance their capabilities. Communication plays a vital role. It has to be secure. Fast. Reliable. And above all, digital. And automated. That’s exactly what has been driving Retarus since 1992. Founded on the idea of linking the LAN email system cc:Mail to the public CompuServe email network using the Retarus-developed software platform CIS:Link, Retarus is now one of the leading international providers of secure and high-performance communication for business-critical processes. Tailored to the needs of the upper middle market and international corporations. Providing cloud platforms that secure all relevant channels of business information exchange from a single source. From email and fax, to SMS and EDI. For all standards. For all industries. And ready today for what tomorrow’s business will demand. We are proud that the world’s most successful companies appreciate our contribution to their value creation relying on our services for their business communication. Our vision is to be the global leader for enterprise-level cloud solutions, enabling business communication in a reliable, efficient, and compliant manner.
The Hague, Netherlands
StartMail is a secure email service that protects your privacy. It was built by the people behind Startpage, the world’s first private search engine.
San Francisco, California, United States
Paubox is the easiest way to send and receive HIPAA compliant email. No software to download, no portals to login to, just write and send emails as normal from any device
- The product must provide threat detection capabilities specifically for malware and phishing attacks. - It should include spam filtering to prevent unwanted emails from reaching users. - The software must support content filtering to enforce company policies on acceptable email use. - The product must operate inline, inspecting emails as they are transmitted to and from corporate servers. - It should cater to organizations of various sizes that require enhanced email security measures. - Not just a basic email service; must also include advanced security features like encryption and data loss prevention.
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