Embodiments relate to dynamic horizontal autoscaling for a multi-tenant service. According to an aspect, a computer-implemented method includes configuring a network computing element to route a plurality of requests from two or more clients to a service in a containerized-networked system. A horizontal service-level autoscaler monitors one or more aspects of the requests to the service from the two or more clients. A new pod including a set of running containers with shared resources in the containerized-networked system is created based at least in part on the horizontal service-level autoscaler determining that at least one of the one or more aspects of the requests exceeds a threshold. A new service mapping is created to accept subsequent requests from one of the two or more clients that triggered creation of the new pod.