Virtualisation platforms all do the same fundamental thing (run virtual machines) but they’re designed for quite different environments and use cases. Choosing the wrong one means either paying for capability you don’t need or working around limitations that shouldn’t apply to your situation.
The Four Platforms
VirtualBox
Type: Type 2 hypervisor (runs as an application on top of an existing OS) Cost: Free and open source Platforms:Windows, macOS, Linux
VirtualBox runs as a regular application on your desktop or laptop. You install it like any other software, and it lets you create and run virtual machines within a window on your existing desktop.
It supports a wide range of guest operating systems, handles snapshots well, and includes useful features like shared folders between host and guest, and NAT networking for quick internet access from within a VM.
Where it fits: Testing, development, learning, and running the occasional VM on a personal machine. It’s not designed for production server workloads, it requires a running host OS underneath it, which introduces overhead and means VMs stop when the host sleeps or shuts down. For a developer who wants to test a Linux environment from a Windows laptop, or a sysadmin who needs to spin up a test VM occasionally, VirtualBox is a practical and zero-cost option.
Limitations: Performance overhead from running on top of another OS. Not suited to always-on production workloads. Limited enterprise management features.
Hyper-V
Type: Type 1 hypervisor (bare metal on Windows Server); Type 2 on Windows desktop Cost: Included with Windows Server and Windows 10/11 Pro and Enterprise Platforms: Windows only
Hyper-V ships with Windows Server and with Windows 10/11 Pro and Enterprise. On Windows Server, it functions as a proper bare-metal hypervisor. On Windows desktop, it runs as a feature within the OS.
It integrates natively with the Windows ecosystem, Active Directory, PowerShell, System Center, and Azure. For organisations already heavily invested in Microsoft infrastructure, Hyper-V is a natural choice for server virtualisation. Remote management via Hyper-V Manager or Windows Admin Center is straightforward.
Windows 11 uses Hyper-V internally for features like Windows Sandbox and WSL 2 (Windows Subsystem for Linux), so enabling it on a desktop machine is sometimes necessary regardless of whether you intend to run VMs manually.
Where it fits: Windows Server environments running on-premises infrastructure; Microsoft-centric organisations; Windows desktop users who want built-in virtualisation without additional software.
Limitations: Windows-only. Less polished management interface than commercial alternatives. Not suitable for large-scale enterprise deployments without additional tooling.
Parallels Desktop
Type: Type 2 hypervisor (runs on macOS) Cost: Paid subscription (approximately $100/year for the Pro edition)Platforms: macOS only
Parallels Desktop is the leading virtualisation solution for macOS, particularly on Apple Silicon (M1/M2/M3) Macs. It runs Windows, and other ARM-compatible operating systems. Inside a VM on a Mac with strong performance and tight macOS integration: clipboard sharing, drag-and-drop between Mac and Windows, and coherence mode (where Windows applications appear as native macOS windows alongside Mac apps).
For Mac users who need to run Windows applications that have no Mac equivalent (specific line-of-business software, older Windows-only tools) Parallels is the most polished solution available.
Where it fits: Mac users who need to run Windows alongside macOS. Developers who need to test across operating systems on a single machine.
Limitations: macOS only. Subscription cost. Not a server virtualisation platform.
VMware vSphere (ESXi)
Type: Type 1 hypervisor (bare metal) Cost: Previously free for the ESXi standalone hypervisor; VMware’s acquisition by Broadcom in 2023 ended the free tier and significantly changed licensing. Costs vary by edition. Platforms: Runs on x86-64 server hardware
vSphere is VMware’s enterprise server virtualisation platform. ESXi, the underlying hypervisor, installs directly on hardware and manages VMs without a host OS underneath it. vCenter provides centralised management of multiple ESXi hosts.
For many years, VMware ESXi was the gold standard for enterprise virtualisation and was widely used by MSPs and larger SMEs. Broadcom’s acquisition of VMware and subsequent licensing changes, ending the free ESXi tier, have prompted many organisations to evaluate alternatives.
Where it fits: Larger organisations with existing VMware infrastructure and the budget for commercial licensing. Environments where vSphere’s management and feature depth justify the cost.
Limitations: No longer a cost-effective option for most SMEs following the licensing changes. Proxmox has become the most common alternative recommendation for SME-scale deployments.
A Note on Proxmox
Proxmox VE deserves mention here, even though it’s covered in detail in its own post.
Proxmox is an open source, Type 1 hypervisor based on Debian Linux. It installs directly on hardware, provides a browser-based management interface, supports both KVM virtual machines and LXC containers, and costs nothing in software licensing. It’s become the most commonly recommended VMware alternative for SME environments following the Broadcom licensing changes.
If you’re evaluating platforms for a new deployment, Proxmox is the first alternative to consider before committing to a commercial product.
Which Should You Use?
| Scenario | Recommendation |
|---|---|
| Testing and learning on a personal machine | VirtualBox |
| Running Windows on a Mac | Parallels Desktop |
| Windows Server environment, Microsoft ecosystem | Hyper-V |
| Server virtualisation, cost-conscious | Proxmox VE |
| Existing VMware infrastructure, enterprise budget | vSphere |
| New deployment, no existing platform | Proxmox VE |
Can You Mix Type 1 and Type 2?
Not on the same machine. A Type 1 hypervisor (ESXi, Proxmox, Hyper-V in server mode) installs directly on hardware and takes control of it. A Type 2 hypervisor (VirtualBox, Parallels) runs on top of an existing OS.
On a Windows machine with Hyper-V enabled, VirtualBox performance can be degraded because Hyper-V takes control of hardware virtualisation extensions. This is a known compatibility issue, VirtualBox has a workaround (Hyper-V backend mode), but it’s worth being aware of if you’re running both.