← Back to Blog

KVM vs OpenVZ: What's the Difference and Which Is Better? (2026)

Published May 4, 2026 · 5 min read · Galaxy Cloud Solutions

If you have been shopping for a VPS you have probably seen these two terms. KVM and OpenVZ are different technologies for creating virtual servers. The difference matters because it affects what you can run, how isolated your resources are, and how the server behaves under load.

⚡ KVM VPS from $5/mo — Use code LAUNCH2026 for 50% off

What Is KVM?

KVM stands for Kernel-based Virtual Machine. It is a full virtualization technology built into the Linux kernel. Each KVM virtual machine gets its own kernel, its own virtualized hardware, and completely isolated resources. From the operating system's perspective, a KVM VM looks like a real physical machine.

This means you can run any operating system, load custom kernel modules, use Docker, run VPNs like WireGuard, and do anything that requires low-level system access. Your CPU, RAM, and disk are dedicated to your VM and cannot be touched by other customers on the same physical host.

What Is OpenVZ?

OpenVZ is a container-based virtualization technology. All containers on a physical server share the same kernel. There is no hardware virtualization — instead, the kernel is partitioned to isolate processes and resources between containers.

The upside is efficiency: OpenVZ has less overhead than KVM, which is why OpenVZ plans were historically cheaper. The downside is significant: you cannot run your own kernel, Docker often does not work properly, WireGuard and other kernel modules are unavailable, and resources can be oversold more easily.

Key Differences

Feature	KVM	OpenVZ
Virtualization type	Full virtualization	Container-based
Own kernel	Yes	No (shared kernel)
Docker support	Yes	Limited / often broken
WireGuard VPN	Yes	No
Custom kernel modules	Yes	No
Resource isolation	Hard (guaranteed)	Soft (can be oversold)
OS flexibility	Any OS	Linux only
Performance overhead	Small	Very small

Why KVM Is the Right Choice in 2026

OpenVZ made more sense years ago when hardware was expensive and the resource savings mattered. In 2026 the price difference between KVM and OpenVZ has largely disappeared, and the limitations of OpenVZ have become more painful as Docker, WireGuard, and containerized workloads have become standard tools.

If you want to run Docker, self-host applications in containers, use WireGuard for a VPN, or do anything that requires kernel-level access, you need KVM. OpenVZ will silently fail or outright refuse to support these workloads.

Most reputable VPS providers have moved to KVM. OpenVZ plans still exist at the very low end of the market, usually from providers trying to maximize the number of customers on a single physical host through resource overselling.

What Galaxy Cloud Solutions Uses

All Galaxy Cloud Solutions VPS plans use KVM virtualization running on Proxmox VE. You get a fully isolated virtual machine with dedicated resources, your own kernel, and full support for Docker, WireGuard, and custom kernel modules. Every plan from $5/month includes these capabilities.