System1 is an advertising technology and customer-acquisition company that employs roughly 224 people worldwide. The organization added 9 new team members while 14 employees departed, producing a slight net decrease in overall workforce size. Headcount is spread across a broad range of technical, commercial, and operational roles, reflecting the blended data science and marketing expertise required for its performance-driven ad platform.
Engineering is the largest function at System1 with 68 employees, accounting for about one-third of total staff and underscoring the company’s technology focus. Marketing & Product follows with 49 employees, while Finance & Administration supports operations with 22 team members. Information Technology, Operations, Business Management, Human Resources, Sales & Support, and Program & Project Management each range between 5 and 19 employees, showing a balanced approach to corporate support and customer-facing work. An additional 7 employees are categorized in other specialized roles, bringing the total to 15 distinct departments.
System1’s headcount is distributed across more than 20 locations. Los Angeles hosts the largest office with 85 employees and serves as the primary corporate hub, while 88 employees work in various remote or smaller sites classified as “Other.” Seattle is the next-largest U.S. location with 26 employees, and smaller teams of 3-6 people operate in Toronto, Boulder, San Diego, Santa Monica, Bothell, Denver, and Guelph. The spread indicates a hybrid footprint that combines a central headquarters with multiple satellite offices and remote talent pools.