GreatHorn Email Security

Advanced email threat detection. Simple cloud connection.
Enterprise-class protection.

The greatest threats to your organization don’t come
in clearly marked packages.

GreatHorn sees what others miss. We protect you from both cleverly crafted
phishing attacks and widespread traditional threats – from the point of delivery and throughout an email’s lifecycle.


“GreatHorn not only identifies more threats than other product, it also provides us with easy remediation capabilities in the rare event that it misses something. ”

Yoel Alvarez, Hersha Hospitality Management

Comprehensive Email Security—
No Exceptions.

From missed executive impersonations and credential theft attempts to wasted hours spent reviewing quarantine folders and writing PowerShell scripts, email security can be a source of both frustration and risk.

Built specifically for cloud email and designed to protect against both sophisticated phishing attacks and fast-moving zero-day threats, GreatHorn directly connects to your Office 365 or G Suite email environment—in as little as 5 minutes.  

Protection Against Every Threat.

By automating detection, remediation, and incident response, GreatHorn gives you a straightforward, effective, and comprehensive email security solution.

No MX record changes. No PowerShell scripts. No exposure. No exceptions.

Protection at Every Vulnerability Point—From Delivery to Deletion.

Email threats don’t stop at the perimeter, and neither should your email security platform. With GreatHorn
Email Security, protection means more than just detecting and quarantining threats at time of delivery.
That’s why we provide tools for every stage of the email security lifecycle:

Real-Time Incident Response

Respond to incidents faster and eliminate PowerShell scripts with post-delivery threat removal (that’s still available weeks after initial delivery), multi-factor search capabilities, forensic analysis, and end-user reporting functionality. Learn More

Advanced Threat Detection

Identify and protect against both emerging and targeted threats using GreatHorn’s combination of advanced threat intelligence, deep relationship analytics, technical and social fingerprinting, spoofing detection, and anomaly identification. Learn More

Link Protection

Empower users by providing them with meaningful context and the security tools they need to make better risk decisions and become intelligent, informed, and vital parts of your security posture. Learn More

Simplified Protection.
360-Degree Detection.

Detecting threats before they reach your employees is just the first step in enterprise-class protection. With GreatHorn, protection isn’t just about detection. 

Here are some of the other benefits our customers see.


No gateway to manage. No MX records to reroute. Uninterrupted email flow means no dependency on 3rd party for email deliverability. Visibility into both internal & external email.


More effective, tunable threat detection. Fewer quarantined emails due to automated, customizable remediation actions. No more PowerShell scripts with easy post-delivery email removal based on multi-vector search.


In-context user training reduces risk while educating employees. Context-driven policy reminders encourage business process adherence. Reduced use of quarantine minimizes disruption to business.

Schedule a Demo

GreatHorn’s cloud-native email security platform shields your organization from both advanced phishing attacks and fast-moving zero-day threats. Using sophisticated threat detection, accessible user context tools, and integrated incident response capabilities, we protect against email threats better than any other platform.

Schedule a demo today, to see how GreatHorn is different from other legacy secure email gateway solutions.

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