GreatHorn Email Security was built for the cloud, with seamless API deployment across your entire organization.

  • Be up and running in less than 5 minutes.
  • Out-of-the-box default policies for immediate protection.
  • No changes to mail routing or MX records, so mail always gets to your users.
  • Deep relationship analytics to detect business email compromise and account compromise.
  • The only solution to provide pre-analysis to detect and apply automated remediation prior to delivery to an end user’s inbox.
microsoft 365 advanced email threats

Defense-in-Depth Email Security for Microsoft 365

GreatHorn provides a simplified layer of sophisticated anti-phishing detection and remediation to complement Native Microsoft 365 capabilities, including EOP and ATP.

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Detect and Remediate Internal Spearphishing and Account Compromise

GreatHorn provides organizations with the only defense available to validate the identity of a sender using biometric authentication, eliminating internal spearphishing and account compromise.

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automate remediation
microsoft 365 automate remediation

Detect and Remediate Internal Spearphishing and Account Compromise

GreatHorn provides organizations with the only defense available to validate the identity of a sender using biometric authentication, eliminating internal spearphishing and account compromise.

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microsoft 365 mailbox intelligence warning pages

Enable End Users

Provide end users with the contextual information they need with real-time customized banners, Mailbox Intelligence and suspicious link warning pages.

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Simplify Search and Remediation

GreatHorn provides complete visibility across the native Microsoft 365 environment, allowing teams reducing the time to detect and respond to threats to seconds.

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microsoft 365 search and remediation
microsoft 365 search and remediation

Simplify Search and Remediation

GreatHorn provides complete visibility across the native Microsoft 365 environment, allowing teams reducing the time to detect and respond to threats to seconds.

Learn More >

microsoft 365 logo

Learn more about how GreatHorn can simplify cloud email security for Microsoft 365 to detect and remediate advanced threats.

Get Your FREE Email Threat Assessment

Learn what advanced threats are currently getting through your existing email security and into your end users’ mailboxes.