GreatHorn Email Security | Partner Program for Resellers, MSPs & MSSPs


Learn why our partners rely on GreatHorn to provide email security assurance to their Office 365 and G Suite customers

From strategy through initial deployment, day-to-day management to zero-day remediation, organizations increasingly rely on their reseller partners and managed service providers to build, manage, and maintain a comprehensive cloud security strategy.

By offering GreatHorn as part of your portfolio, you can deliver trust back to your customers’ email systems – because we warn them when email can’t be trusted. Using our cloud-native email security platform, your customers can not only stop known threats, but also gain the necessary context and warnings to help identify the highly targeted, sophisticated spear phishing attacks that often bypass traditional solutions such as secure email gateways.

Together, we can make email better.

““Email is the most trusted, least secure, system we use every day.””

GreatHorn Customer



Be a part of the GreatHorn channel partner community!

Designed to support both reseller and referral relationships, our channel partner program offers a unique opportunity to drive growth and profitability. It is designed to support and reward our partners, while providing their customers an industry leading solution to meet their cloud email security needs.


Join GreatHorn’s growing Managed (Security) Service Provider (MSP/MSSP) network!

We work closely with our MSP partners to develop and support a comprehensive security solution that includes protection from sophisticated phishing, business email compromise, credential theft, and malware / ransomware attacks.


Provide us with a little background on who you are and why you’re looking to partner with us. We’ll get in touch quickly to let you know how we can get started. We can’t wait to do business together!

Why Partner with GreatHorn?

  • Quick and easy set-up – Cloud-native architecture and API integration means getting started takes five minutes – not five months. No DNS or MX route changes needed
  • Comprehensive email security platform – Combined protection against both business email compromise and phishing as well as suspicious and malicious URLs and malware
  • Zero-day attack management – Sophisticated, relationship-based analytics detect behavior anomalies before the threat has been identified, while incident response capabilities enable you to eliminate threats even post-delivery
  • Customizable Policy Engine – Robust policy management capabilities to tailor for each organization

Fill out the form on the right to get the conversation started.

Request to Be a Partner


As part of the GreatHorn Partner Program, we have a deal registration process for partners to formally register a deal.

Click below to register a deal!