Top 23 Cloud Email Security Solutions Companies (October 2026)

Campbell, California, United States

Barracuda is a leading cybersecurity company providing complete protection against complex threats. Our platform protects email, data, applications and networks with innovative solutions, and a managed XDR service, to strengthen cyber resilience. Hundreds of thousands of IT professionals and managed service providers worldwide trust us to protect and support them with solutions that are easy to buy, deploy, and use. For more information, visit barracuda.com.

San Francisco, California, United States

Abnormal Security is the leading AI-native human behavior security platform, leveraging machine learning to stop sophisticated inbound attacks and detect compromised accounts across email and connected applications.

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.

Toronto, Ontario, Canada

Echoworx protects the privacy of people and businesses throughout the world by making email data protection easier. Our scalable, easy to use, and configurable cloud security and email encryption solutions, have been adopted by the top and best in the business across more than 30 countries. Our next level email encryption protection is offered as a completely turn-key, cloud-based managed service, with a passionate hands-on expert staff to help transform communication chaos into order for organizations who understand — it pays to be secure.

Denver, Colorado, United States

Valimail is a pioneering, identity-based, anti-phishing company that has been ensuring the global trustworthiness of digital communications since 2015. Valimail delivers the only complete, cloud-native platform for validating and authenticating sender identity to stop phishing, protect and amplify brands, and ensure compliance. Valimail has won more than a dozen prestigious cybersecurity technology awards and authenticates billions of messages a month for some of the world's biggest companies and organizations, including Uber, Fannie Mae, WeWork, and the U.S. Agency for International Development.

Middletown, Delaware, United States

PowerDMARC empowers organizations to combat Business Email Compromise (BEC), email spoofing, and phishing with ease. Our AI-driven threat intelligence and advanced email authentication solutions ensure that only legitimate emails are sent from your domain—safeguarding your brand’s reputation. As a single SaaS platform, PowerDMARC seamlessly integrates DMARC, SPF, DKIM, BIMI, Hosted MTA-STS, and TLS-RPT, making email security simple and effective. How PowerDMARC Helps: ✅ Prevents spoofing and impersonation attacks ✅ Strengthens email authentication to protect your brand’s reputation ✅ Enhances email deliverability and trust ✅ Shields your domain from fraud and phishing attempts 🔹 For MSPs & MSSPs: Benefit from multi-tenancy, full white-labeling, and scalable email security management for your clients.

Paris, Ile-de-france, France

Rise Up is owned by Riseup Networks, a US-based tech collective that provides secure communication and networking tools to activists, organizers, and community groups worldwide. Riseup offers a suite of free and open-source communication tools, including email, chat, VPN, and mailing list services, designed to protect the privacy and security of its users. The company is committed to resisting censorship and surveillance, and operates on a collective model that prioritizes democratic decision-making and community ownership. Riseup Networks is headquartered in Seattle, Washington, and is run by a team of volunteers and staff who are passionate about social justice and activism.

Sandyford, Dublin, Ireland

Topsec is a leading provider of cloud based managed email security solutions. Providing services to a large and diverse international client base for over a decade. At Topsec Cloud Solutions, we’ve been pioneering cloud-based email and web security for more than two decades. Our clientele spans across various sectors, including Government, Healthcare, Engineering, IT and more, each valuing our commitment to excellence and innovation. Our services include anti spam, anti virus, emergency email, email content filtering, image analysis, email archiving, inbox protection, breachdetect, file sharing and domain management. We help clients secure and manage their businesses information with no upfront investment. Through our services and experience, we save our clients thousands and Topsec is their trusted choice for delivering cloud based security solutions. Topsec is a division of Top Security Group. Top Security is an International company with over 34 years experience in physical security and entered the digital assets security industry with the launch of Topsec in 2002. We are proud to be the sole provider of a fully managed concierge service tailored to your email security needs. Our unmatched customer support is the cornerstone of our operations. We believe in putting you first, always. Our growth stems from leveraging cloud scalability to deliver superior security services, ensuring affordability and quality across diverse industries.