Credential Theft


Comprehensive Threat


“GreatHorn gives you the confidence that your business, your people, and your communications are safe.”

Jeff Kohrman

Founder and CEO, eCISO

Innovative Companies Trust GreatHorn

“I used to worry about email as a threat vector. But since we started working with GreatHorn, email security doesn’t keep me up at night.”

Jason Shane, Vice President of IT at Hersha Hospitality Management

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Combat Phishing with Modern Email Security

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Live Webinar on December 10 @ 2 pm EST: An Intro to GreatHorn

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2019 Email Security Trends, Challenges, and Benchmarks Research

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GreatHorn combines patented threat detection, continuous monitoring, end-user education, and integrated remediation capabilities into one, comprehensive platform.


Adaptive, anomaly-based protection from phishing and social engineering attacks. GreatHorn learns your individual communication patterns, adjusting to identify deviations typical of attack patterns.


Provide your employees with greater security awareness and customized controls to empower and transform them into valuable components of your organization’s defense strategy.


No more PowerShell scripts. Simplify email incident response with GreatHorn’s one-click removal and claw-back, post-delivery monitoring, and automated threat management.

Email Phishing in School Districts

Despite many attempts to heighten email security through user training sessions and simulated phishing attacks, phishing scams continue to rake in...

Where to Find GreatHorn in 2020

Innovation and customer centricity drive GreatHorn year-round, shaping the product we produce and the market we serve. The challenges at the top of your...

Phishing emails, explained: “New Voicemail Message!”

In GreatHorn’s blog series, “Phishing Emails, Explained,” we take a closer look at real-world phishing emails and the tactics cybercriminals use to lure...

Why an API approach to securing email in the cloud is better than the secure email gateway method

The term “cloud-native” gets thrown around a lot, but in email security there are very few cloud-native solutions. It’s crucial to understand the...

Phishing Emails, Explained: “Action Required – Mail Sync Error!”

This is the first post in our new blog series, "Phishing Emails, Explained." In this series, we'll take a closer look at real-world phishing examples and...