Azure Stack HCI solution overview – Azure Stack HCI | Microsoft Learn

Azure Stack HCI is a hyperconverged infrastructure (HCI) cluster solution that hosts virtualized Windows and Linux workloads and their storage in a hybrid on-premises environment. Azure hybrid services enhance the cluster with capabilities such as cloud-based monitoring, Site Recovery, and VM backups, as well as a central view of all of your Azure Stack HCI deployments in the Azure portal.

https://learn.microsoft.com/en-us/azure-stack/hci/overview