Azure Stack HCI Pricing and Features: Hyperconverged Infrastructure Operating System
Azure Stack HCI is Microsoft's hyperconverged infrastructure operating system that delivers on-premises virtualization with native Azure integration. It combines compute, storage, and networking into a single cluster that is managed through the Azure portal, Windows Admin Center, or PowerShell. EPC Group has deployed Azure Stack HCI for enterprises that need the agility of cloud management with the data sovereignty, latency, and compliance advantages of on-premises infrastructure.
Overview of Azure Stack HCI
Azure Stack HCI is a purpose-built HCI operating system sold as an Azure service with a per-core, per-month subscription model. Unlike Windows Server with the HCI role, Azure Stack HCI is designed from the ground up for hyperconverged deployments and receives feature updates more frequently, including new capabilities like GPU partitioning, stretched clustering, and Azure Arc VM management.
The platform runs on validated hardware from over 20 OEM partners including Dell, Lenovo, HPE, and DataOn. Clusters can scale from a single node (for edge locations) to 16 nodes for large datacenter deployments. Storage Spaces Direct provides software-defined storage, while Software Defined Networking (SDN) delivers network virtualization capabilities.
- Azure-native management: Register clusters with Azure and manage VMs, storage, and networking from the Azure portal
- Azure Arc integration: Provision and manage VMs using Azure Resource Manager templates and RBAC
- Azure Kubernetes Service (AKS): Run AKS on Azure Stack HCI for containerized workloads on-premises
- Azure Virtual Desktop: Host session desktops on-premises with Azure Virtual Desktop on HCI
- Stretched clustering: Span a cluster across two sites for automatic failover and disaster recovery
Key Features
- Storage Spaces Direct (S2D): Software-defined storage with NVMe, SSD, and HDD tiering for optimal cost-performance
- GPU partitioning (GPU-P): Share GPUs across multiple VMs for VDI, AI, and rendering workloads
- Live migration: Move running VMs between cluster nodes with zero downtime
- Cluster-Aware Updating: Rolling updates across nodes without workload interruption
- Network ATC: Intent-based network configuration that simplifies deployment and reduces misconfigurations
- SDN integration: Software load balancers, virtual network gateways, and microsegmentation
- Trusted platform module (TPM): Hardware-based security for BitLocker, Credential Guard, and secure boot
- Azure Backup and Site Recovery: Native integration for VM backup and DR to Azure
- Single-node clusters: Deploy at edge locations with a single server for cost-effective branch deployments
- Switchless networking: Two-node clusters can use direct-attach networking without a network switch
Pricing Tiers
Azure Stack HCI uses a simple per-core subscription model billed through your Azure subscription. There is no upfront software licensing cost—you pay monthly based on the number of physical cores in your cluster.
Azure Stack HCI Host Subscription
- Approximately $10 per physical core per month
- Minimum of 8 cores per physical server (16 cores minimum billed)
- Includes the HCI operating system, Azure portal management, and updates
- 60-day free trial available for evaluation
Windows Server Guest Licensing
- Windows Server VMs require separate guest licensing
- Option 1: Azure Hybrid Benefit with existing Software Assurance licenses
- Option 2: Pay-as-you-go Windows Server subscription through Azure
- Linux VMs run at no additional OS licensing cost
Additional Azure Service Costs
- Azure Backup: Per-protected-instance pricing
- Azure Site Recovery: Per-replicated-instance pricing
- Azure Monitor: Based on data ingestion volume
- AKS on HCI: No additional charge for the AKS management layer
Enterprise Use Cases
- VDI and desktop virtualization: Host Azure Virtual Desktop sessions on-premises for latency-sensitive or compliance-restricted environments
- SQL Server consolidation: Run SQL Server Always On availability groups on HCI with S2D for high-performance, highly available databases
- Branch office infrastructure: Replace aging branch servers with single-node or two-node HCI clusters managed from Azure
- Dev/test environments: Rapidly provision and tear down VMs using Azure Arc and ARM templates
- HIPAA and regulated workloads: Keep protected data on-premises while leveraging Azure management and monitoring
- Kubernetes at the edge: Run AKS on HCI for containerized applications at retail stores, factories, or healthcare facilities
- Disaster recovery: Stretched clustering across two sites provides sub-second RPO without Azure Site Recovery costs
Integration with Other Azure Services
- Azure Arc: Full Azure Resource Manager control plane for VMs, Kubernetes, and data services running on HCI
- Azure Monitor: Centralized monitoring with Insights for HCI cluster health, performance, and capacity
- Azure Backup: Agentless VM backup directly to Azure Recovery Services vaults
- Azure Site Recovery: VM replication to Azure for disaster recovery
- Azure Update Management: Centralized patching for HCI hosts and guest VMs
- Microsoft Defender for Cloud: Continuous security assessment and threat detection for HCI workloads
- Azure Policy: Enforce governance and compliance rules across on-premises HCI resources
Best Practices for Enterprise Deployments
- Use validated hardware: Always select from the Azure Stack HCI Catalog to avoid compatibility issues
- Design storage tiers properly: Use NVMe for cache, SSD for hot data, and HDD for capacity tiers based on workload IO profiles
- Plan network architecture: Dedicate RDMA-capable NICs for storage traffic and separate management from compute networks
- Enable Azure Arc VM management: Use Azure Resource Manager for consistent VM provisioning across cloud and on-premises
- Implement stretched clusters for DR: For mission-critical workloads, use synchronous replication across two sites
- Monitor with Azure Stack HCI Insights: Proactively track cluster health, disk latency, and capacity trends
- Plan upgrade paths: Azure Stack HCI receives annual feature updates; plan validation and rollout windows
- Leverage Azure Hybrid Benefit: Apply existing Windows Server and SQL Server licenses to reduce per-VM costs
Why Choose EPC Group for Azure Stack HCI
With 28+ years of enterprise Microsoft infrastructure consulting, EPC Group is uniquely qualified to design, deploy, and manage Azure Stack HCI environments. We have built hyperconverged solutions for healthcare organizations requiring HIPAA-compliant on-premises compute, financial institutions with SOC 2 audit requirements, and government agencies operating under FedRAMP.
Our consultants handle hardware selection, cluster sizing, storage design, network architecture, Azure integration, and workload migration. We deliver turnkey HCI deployments that consolidate aging infrastructure while enabling cloud-native management through Azure Arc.
Ready to Modernize with Azure Stack HCI?
Contact our infrastructure architects for a free assessment of your current virtualization environment. We will evaluate your workload requirements, recommend optimal hardware configurations, and deliver a migration plan to Azure Stack HCI.
Frequently Asked Questions
What is the difference between Azure Stack HCI and Windows Server?
Azure Stack HCI is a purpose-built hyperconverged operating system sold as an Azure subscription service with faster feature updates and deeper Azure integration. Windows Server is a general-purpose OS that includes the HCI role but receives updates less frequently. Azure Stack HCI is the recommended platform for new hyperconverged deployments with Azure integration requirements.
How many nodes can an Azure Stack HCI cluster have?
Azure Stack HCI supports clusters from 1 node (for edge deployments) to 16 nodes for large datacenter environments. Two-node clusters are the most common for branch offices, while 4–8 node clusters are typical for datacenter consolidation projects. Stretched clusters across two sites require a minimum of 4 nodes (2 per site).
Can I run Kubernetes on Azure Stack HCI?
Yes. Azure Kubernetes Service (AKS) runs natively on Azure Stack HCI, providing the same Kubernetes experience as AKS in the cloud. You can deploy and manage Kubernetes clusters through the Azure portal or CLI, use Azure Arc for GitOps-based configuration management, and integrate with Azure Container Registry for container image management.
Is Azure Stack HCI suitable for HIPAA-regulated workloads?
Absolutely. Azure Stack HCI keeps data on-premises while providing Azure-grade management and security. With BitLocker encryption, Credential Guard, TPM-based secure boot, and integration with Microsoft Defender for Cloud, it meets HIPAA technical safeguard requirements. EPC Group has deployed HIPAA-compliant HCI clusters for healthcare organizations managing EHR systems and medical imaging workloads.
Can I migrate from VMware to Azure Stack HCI?
Yes. Microsoft provides migration tools and guidance for moving VMware VMs to Azure Stack HCI. Azure Migrate can assess your VMware environment and plan the migration. EPC Group has performed large-scale VMware-to-HCI migrations for enterprises looking to reduce licensing costs and consolidate on the Microsoft stack while maintaining on-premises infrastructure.