Systems, methods, and other embodiments associated with managing instances of services are described. In one embodiment, a method includes constructing pre-provisioned instances of a service within a first pool and constructing pre-orchestrated instances of the service within a second pool. In response to receiving a request for the service, the method executes executable code of a first pre-orchestrated instance as an executing instance and removing the pre-orchestrated instance from the second pool. A pre-provisioned instance is selected from the first pool to create a second pre-orchestrated instance within the second pool, and the pre-provisioned instance is removed from the first pool.