A10 Networks, Inc. provides secure application services and solutions for on-premises, cloud, and edge-cloud environments. The company specializes in application delivery controllers (ADCs), DDoS protection, and web application firewalls that ensure the performance, availability, and security of business-critical applications. Headquartered in San Jose, California, A10 serves telecommunications providers, cloud operators, government organizations, and large enterprises globally.
A10's revenue is concentrated among a limited number of large end-customers and service providers. In fiscal 2025, one customer ("Customer A") accounted for approximately 26% of total revenue (up from 15% in 2024 and 14% in 2023), and purchases from the ten largest end-customers accounted for approximately 40% of total revenue (versus 38% in 2024 and 33% in 2023). Much of the business flows through distribution partners: a single distribution channel partner represented approximately 29% of total revenue in 2025 (20% in 2024, 19% in 2023) and 23% of gross accounts receivable as of December 31, 2025. By vertical, service providers generated about 60% of 2025 revenue and enterprises about 40%.