OpenVZ (and its commercial lineage) powered a large share of budget VPS offers for years. KVM is now the default for most new deployments. Customers still ask which is better because old marketing pages and forum threads never fully disappear.
The technical difference that matters
OpenVZ-style container virtualization shares the host kernel. That made dense, cheap VPS possible. It also meant weaker isolation, limits on custom kernels, and occasional “noisy neighbor” effects that were hard to explain. KVM gives each virtual machine its own kernel. Isolation is stronger, custom kernels and modules are possible, and the failure of one guest is less likely to affect others.
Why OpenVZ faded for general VPS
Security expectations rose. Customers wanted to run Docker, WireGuard, or custom modules. Providers preferred a single virtualization stack that could also support Windows and varied Linux distributions without special casing. KVM (and similar full virtualization) won on flexibility even when it cost a bit more per instance.
Legacy OpenVZ or Virtuozzo containers still exist in some networks. They can be fine for simple, trusted workloads. They are a poor default for anyone who assumes “VPS” means a real virtual machine.
What to buy in 2026
If the provider says KVM (or another full hypervisor), you are in the mainstream. If the listing is vague or still advertises OpenVZ as a feature, read the fine print and decide whether the price advantage is worth the constraints. For most new projects the answer is no.
Written at the desk
ChadBe the first to weigh in.