Concepts and technologies are disclosed herein for decoupling hardware and software components of network security devices to provide security software as a service in a distributed computing environment. A computer system includes a processor that can execute computer-executable instructions to perform various operations. The processor can perform operations to provide security services to one or more customer platforms. The operations can include receiving a network security software component from a security service provider, and deploying the network security software component within a distributed computing environment so that the network security software component can be executed by a computing resource of the distributed computing environment to provide a security service to the customer platform(s). The network security software component includes a software component that has been decoupled from a hardware component of a network security device by the security service provider.