As of September 2026, Latka tracks 4 cloud email security solutions companies with $10M–$100M in annual revenue. They have combined revenues of $211M and employ 1.5K people. They serve 419 customers combined.
Every company below sells cloud email security solutions to other businesses and is ranked by its most recent annual revenue. Revenue, funding, headcount and customer figures come from CEO interviews on the Latka podcast, public company filings, and Latka estimates where a company has not disclosed a number.
Cloud Email Security Solutions are designed to protect organizations from various email-based threats, including spam, phishing, malware, and ransomware. These solutions utilize cloud-based technology to secure email traffic and provide advanced filtering capabilities, thereby ensuring the integrity and confidentiality of communications. Primary use cases for these solutions include safeguarding sensitive data from unauthorized access, ensuring compliance with regulatory requirements, and enhancing overall organizational security posture. Typical features of cloud email security solutions include advanced threat detection, data loss prevention (DLP), encryption, and real-time monitoring of email traffic. These solutions often integrate with existing cloud email services to provide a seamless security experience without significant disruptions to workflow. Common buyer personas include IT security professionals, compliance officers, and organizational leaders focused on mitigating risk associated with email threats.
Sorting: Highest -> Lowest
Showing 4 of 4 companies ranked by annual revenue.
Geneva, Geneve, Switzerland
Developer of an online platform designed to provide a free web-based encrypted email service. The company's platform uses client-side encryption to protect emails and user data, enabling clients to get end-to-end encrypted email services anytime.
Geneva, Switzerland
ProtonMail was founded in 2013 by scientists who met at CERN and were drawn together by a shared vision of a more secure and private Internet. Since then, ProtonMail has evolved into a global effort to protect civil liberties and build a more secure Internet, with team members also hailing from Caltech, Harvard, ETH Zurich and many other research institutions.
Munich, 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.
LORGUES, France
Publisher of SaaS email and archiving services. The company's electronic document management and back-up and archiving in SaaS mode include a backup appliance, Titan, integrated in a high-security box tested fireproof and equipped with Raid 1 mounted discs that can be used in private or hybrid cloud mode.
Latka tracks 4 cloud email security solutions companies with $10M–$100M in annual revenue. Together they generate $211M in annual revenue and employ 1.5K people.
Proton AG is the largest, with $97.5M in annual revenue, founded in 2014.
The average cloud email security solutions company in this list makes $52.7M a year, across 4 companies with reported revenue. They serve 419 customers combined.
Ranked by annual revenue, the leaders are Proton AG, Proton AG., Retarus and Eukles Solutions.
- Must provide advanced threat detection and filtering for email communications. - Should include data loss prevention to protect sensitive information. - Must offer integration capabilities with existing cloud email platforms. - Should enable real-time monitoring and reporting on email security incidents. - Not just a basic spam filter; must also address phishing and malware threats.
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