Hyper-Converged Infrastructure refers to a system where numerous integrated technologies can be managed within a single system, through one main channel. Typically software-centric, the architecture tightly integrates storage, networking, and virtual machines.
It is a subscription-based service. Red Hat charges you a subscription fee.
It is quite pricey.
Red Hat Hyperconverged Infrastructure is an open-sourced, low-cost solution with full features.