Systems, methods, and other embodiments associated with pre-provisioning instances of a service are described. In one embodiment, a method includes constructing pre-provisioned instances of a service within a pool. The pool may be evaluated to obtain a list of pre-provisioned instances in response to receiving a request for execution of the service. A pre-provisioned instance is selected from the list of pre-provisioned instances. The pre-provisioned instance then provisioned by retrieving and installing executable code of the service into a computing environment of the pre-provisioned instance. The example method may also include executing the provisioned instance.