Email Security and Data Loss Prevention Redefined


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Detect, inspect and secure critical data through industry-leading Email Security
and Data Loss Prevention solutions across email, web, and the cloud.

A Key Part of Fortra


Clearswift is proud to be part of Fortra’s comprehensive cybersecurity portfolio. Fortra simplifies today’s complex cybersecurity landscape by bringing complementary products together to solve problems in innovative ways. These integrated, scalable solutions address the fast-changing challenges you face in safeguarding your organization. With the help of the powerful protection from Clearswift and others, Fortra is your relentless ally, here for you every step of the way throughout your cybersecurity journey.

Our Award-Winning Email Security Software

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Email Security

Clearswift offers a unique and effective layer of real-time signature-less inspection to detect and sanitize evasive threats, delivering highly secure email without delay, whether it's working on its own or alongside other deployments such as Office 365.

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Data Loss Prevention

Automatically apply the optimal security treatment based on data's content, context and required regulation policy, including real-time redaction, encryption, blocking or deleting and protecting against sensitive data leakage in image-based files.

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Cloud Security

Wrap an unprecedented layer of email security and sanitization around Office 365 to prevent targeted phishing attacks, embedded malware, and the loss of sensitive and confidential data that could evade Microsoft's basic security controls.

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Web Security

Protect against malicious websites, phishing and drive-by downloads that evade detection with a deep level of web inspection that scans content with a choice of three anti-virus engines. Add an unprecedented layer of content threat protection and data loss prevention to secure existing web proxy infrastructures and managed file transfers.

Why Choose Clearswift?



Clearswift integrated, adaptive email security solutions are robust – even filling vulnerable gaps that other email security solutions like Microsoft Office 365 miss. Features like structural sanitization, document sanitization, and automatic redaction remove threats in real-time based on policies set by the organization, minimizing disruption to the business.  

Our responsibility is to safeguard critical information that is shared into and out of the organization. Clearswift enables us to do this without impacting on the effectiveness of our essential daily operations. 

Clearswift Email Security Can Help Fill the Office 365 Vulnerability Gaps

Having a single solution for email security can leave vulnerabilities. Deploying Clearswift email security solutions alongside Microsoft Office 365 ensures your security gaps don’t become a threat to your organization. Read our guide to learn how Clearswift can enhance your standard email security.  


Our responsibility is to safeguard the critical information that is shared in and out of the organization. Clearswift solutions enables us to do this without impacting on the effectiveness of our essential daily operations.

Lee Millest, Desktop Services Manager

Protect Your Business with Clearswift