The market for distributed denial of service (DDoS) mitigation services includes the vendors that deliver services for detecting and mitigating DDoS attacks. It includes specialty providers, whose primary focus is DDoS mitigation, as well as providers that offer DDoS mitigation as a feature of other services (for example, many communications service providers [CSPs] and hosting providers offer DDoS mitigation services). This market only focuses on the service market. It does not analyze the market for DDoS mitigation equipment. The DDoS mitigation providers can be grouped into four categories: scrubbing centers; content delivery networks (CDNs); CSPs and hosting providers; and infrastructure as a service (IaaS).