Described are systems and methods for QoS chaining based on control-plane virtual functions for ensuring end-to-end Quality of Service (QoS) of Internet services. The QoS chaining coordinates broadband service delivery via an orchestrated “chain” or Network Service (NS) consisting of control-plane Virtual Network Functions (VNFs) running in the cloud or virtual infrastructure. Separate service elements, network elements, network domains or other service plane or data plane elements or systems have a separate corresponding VNF in the control plane provide monitor and control functions. QoS is ensured End-to-End (E2E) across the chain of VNFs by coordination through the QoS chain or by a coordinating or integrating E2E orchestrator or E2E VNF. The VNFs may be chained, may communicate directly with each other, and may communicate directly with the E2E orchestrator, may communicate with each other through the E2E orchestrator, or may communicate through a shared database.