OpenVZ: Virtualization solution based on containers that provides lightweight and effective virtualization. KVM: Kernel-based virtual machine that gives Linux complete virtualization on x86 hardware.
OpenVZ: Shared kernel resources lead to efficient use but limited flexibility. KVM: Dedicated resources for each VM, offering greater isolation and flexibility.
OpenVZ: Higher performance due to lower overhead and efficient resource sharing. KVM: Better performance under heavy loads due to dedicated resources.
OpenVZ: Only supports operating systems based on Linux. KVM: is compatible with many different operating systems, including as Windows, Linux, and others.
OpenVZ: Less secure due to shared kernel; issues in one container can affect others. KVM: Highly secure with full isolation between VMs.
OpenVZ: Easier to manage with simpler setup and lower overhead. KVM: Requires more management but offers advanced features and flexibility.