Methods, systems, and computer readable media for providing resilient computer services using systems diversity include a head device for receiving requests from clients and for replicating the requests. Variates each receive a request replicated from the head device, process the request, and generate a response to the request. At least some of the variates are different in configuration from the other. The response processing server receives the responses from the variates, selects one of the responses, and delivers the response to the client via the head device. Configuration or systems diversity and adaptation to threats and failures over time may be achieved using adaptive algorithms.