How Many People Work at Klaviyo? Headcount and Employee Trends

• Klaviyo is a leading B2C CRM platform that enables businesses to leverage real-time data, personalization, and automation to enhance customer engagement, achieving $1.2 billion in revenue for 2025, a 32% year-over-year growth.
• In the past year, Klaviyo launched the Composer tool to streamline campaign creation and expanded its AI capabilities, while also deepening partnerships with Shopify and Google to enhance customer experience.
• Key customers include major brands that have successfully utilized Klaviyo's platform for personalized marketing, with notable growth in text messaging as a primary channel for customer engagement.
• Klaviyo's ideal buyers are mid to large-sized e-commerce businesses looking to improve customer relationships and drive revenue through data-driven marketing strategies, making it a critical tool for sales teams targeting this sector.

Sales & Support is Klaviyo’s largest function at 684 employees, accounting for just over 30 % of total staff and underscoring the company’s focus on customer growth and retention. Engineering follows with 561 employees (about 25 %), reflecting the ongoing investment in product development and platform scalability. Marketing & Product teams together represent nearly 21 % of the organization, while smaller but essential groups such as Business Management, Finance & Administration, Human Resources, IT, Operations, and Legal collectively provide the remaining support infrastructure. Hiring has been spread across nearly every department, keeping the organizational mix well balanced.

The company maintains a significant presence in Boston with 840 employees—its largest single office—while another 855 team members work remotely or from smaller hubs grouped as “Other.” Internationally, London hosts 152 employees, giving Klaviyo a foothold in the European market, and Sydney adds 77 employees to cover the Asia-Pacific region. Additional U.S. offices in Denver, San Francisco, New York, Chicago, Austin, and Seattle range from about 22 to 102 employees each, illustrating a distributed workforce strategy that blends centralized headquarters strength with regional flexibility.