What departments does GreatHorn have?

GreatHorn has employees across 9 departments including Engineering, Customer Success, Analytics, Sales, Quality Assurance.

What is the largest department at GreatHorn?

The largest department at GreatHorn is Sales with 6 employees.

Where are GreatHorn employees located globally?

GreatHorn has employees across 1 continents and 3 countries including United States Of America, Canada, Dominican Republic.

How has GreatHorn's team size changed over time?

GreatHorn's team has decreased from approximately 37 to 6 employees based on available data.

GreatHorn Employee Directory

Computer and Network SecurityMassachusetts, United States2-10 Employees

GreatHorn provides a cloud-based email security solution designed to reduce risk from everyday email use at large, multinational companies. Based in Waltham, Massachusetts, the company employs a multi-stage approach that blends data science, machine learning, technical analysis, and human input to protect organizations before, during, and after phishing attempts.

GreatHorn Global Highlights

North America
44

United States Of America
42
Canada
1
Dominican Republic
1

GreatHorn's Leadership

M. C. M.
Chief Executive Officer
Mobile Phone
Email
K. O.
Chief Executive Officer And Co-Founder
Mobile Phone
Email
K. O.
Chief Executive Officer & Co-Founder
Mobile Phone
Email
J. M.
Ceo
Mobile Phone
Email
K. O.
Chairman
Mobile Phone
Email
J. R.
Company Owner
Mobile Phone
Email
J. L.
Executive Vice President Engineering
Mobile Phone
Email
J. A.
Director, Customer Success
Mobile Phone
Email

GreatHorn Employee Metrics

100%

50%

0%

2026

2025

Engineering
Customer Success
Sales
Analytics
Marketing
Other
Consultant
Business
Media & Communications
Quality Assurance
Accounting

Contact profiles from GreatHorn

Name

Title

Contact Info

Location

Last Update

M. C. M.
Chief Executive Officer
Mobile Phone
Email
CanadaBritish Columbia
Jun 01, 2026
K. O.
Chief Executive Officer And Co-Founder
Mobile Phone
Email
United StatesMassachusetts
May 15, 2023
K. O.
Chief Executive Officer & Co-Founder
Mobile Phone
Email
Apr 16, 2026
K. O.
Chairman
Mobile Phone
Email
United StatesMassachusetts
Oct 23, 2024
J. R.
Company Owner
Mobile Phone
Email
United StatesNorth Carolina
May 31, 2026
J. M.
Ceo
Mobile Phone
Email
United StatesMassachusetts
Apr 18, 2025
J. L.
Executive Vice President Engineering
Mobile Phone
Email
Jun 27, 2025
J. A.
Director, Customer Success
Mobile Phone
Email
UNITED STATES
Jul 17, 2025
D. F.
Senior Customer Success Manager
Mobile Phone
Email
UNITED STATES
Oct 17, 2024
J. C.
Customer Success Manager
Mobile Phone
Email
Oct 17, 2024

Frequently Asked Questions

What is GreatHorn known for?

GreatHorn operates in the Computer and Network Security industry. The company's main headquarters is located in 1075 Main Street Suite 210 Waltham, Massachusetts United States; you can contact the main corporate office by phone at

+1-800-604-****

. Explore GreatHorn's company overview page for more information.

What is GreatHorn's most common email format?

GreatHorn employees' email format typically follows the pattern of . Trying to find reliable and up-to-date employee contact data? Find more GreatHorn email formats with LeadIQ.

How many employees does GreatHorn have currently?

GreatHorn has approximately 7 employees as of May 2026. These team members are located across 1 continents, including North America.

Who are GreatHorn's key employees and leadership?

As of May 2026, GreatHorn's key employees include:

Chief Executive Officer: M. C. M.
Chief Executive Officer And Co-Founder: K. O.
Chief Executive Officer & Co-Founder: K. O.
Ceo: J. M.
Chairman: K. O.

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GreatHorn Employee Directory

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