Company Insights
Published on
April 22, 2026

How Many People Work at Illumio? Headcount and Employee Trends

Total Employees
630
7.2% from last year
30
New Hires (YTD)
88
5% of total workforce
Departments
14
650 in Engineering
Locations
15
5,012 in New York, NY
  • Illumio specializes in breach containment and Zero Trust segmentation, recently recognized as a leader in microsegmentation by independent research firms and achieving a 98% willingness-to-recommend score in Gartner Peer Insights.
  • In the past year, Illumio launched its agentless visibility and breach containment platform for hybrid environments, enhancing its capabilities to provide real-time visibility and risk mitigation across cloud and data center settings.
  • Illumio's solutions are utilized by large organizations with mature cybersecurity programs, and it has established partnerships with major firewall providers like Check Point and Fortinet to enhance its service offerings.
  • The ideal buyer for Illumio includes cybersecurity leaders in large enterprises looking to reduce the risk of lateral movement in their networks, as Illumio's solutions can significantly decrease the cost and impact of downtime, evidenced by a reported $3.8 million savings in downtime costs.

Illumio Headcount Breakdown by Department

Illumio’s largest teams are Sales and Support (231 employees, about 36.7%) and Engineering (181 employees, about 28.7%), together accounting for roughly 65% of the workforce. Marketing and Product totals 70 employees (about 11.1%), while Business Management (35), Information Technology (33), and Finance and Administration (32) each make up around 5% of headcount. Human Resources has 21 employees, Operations has 15, and Program and Project Management has 5, with 7 categorized as Other. The data shows a product- and customer-focused mix with substantial supporting functions across IT, finance, HR, and operations.

Sales and Support
231
Engineering
181
Marketing and Product
70
Business Management
35
Information Technology
33
Finance and Administration
32
Human Resources
21
Operations
15
Program and Project Management
5
Other
7

Illumio Employees by Location

Employee distribution spans multiple hubs with the largest concentration in San Francisco, CA (227 employees, about 36%). Additional U.S. hubs include Denver (13), New York (12), Boston (8), Austin (7), and Chicago (7). International presence includes Sydney (13), Singapore (10), and London (9). A significant portion of the workforce is grouped under Other (324 employees, about 51%), suggesting a distributed or multi-site footprint beyond the listed locations.

San Francisco, CA
227
Denver, CO
13
Sydney, Australia
13
New York, NY
12
Singapore, Singapore
10
London, UK
9
Boston, MA
8
Austin, TX
7
Chicago, IL
7
Other
324
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