SustainedCloudWhat is Proxmox?
Proxmox VE (Virtual Environment) is an open-source platform for running virtual machines and containers on your own hardware, developed by Proxmox Server Solutions in Vienna. It covers clustering, live migration, software-defined storage and integrated backup, without per-core licensing. Since Broadcom's takeover of VMware sent license prices up sharply, it has become the standard alternative for small and mid-sized environments.
What it replaces
For typical two-to-ten-host environments, Proxmox VE covers what companies used VMware ESXi and vSphere for: virtual machines, high availability, live migration between hosts, snapshots and backup integration. It is built on Debian Linux with KVM for VMs and LXC for containers, all mature, widely deployed technology.
What it costs
The software itself is free and fully functional. Production environments should add a subscription for the stable enterprise repository and support, priced per CPU socket per year (from roughly €115). The real cost sits elsewhere: competent setup, storage design and ongoing operations, which is true of every virtualization platform.
Migration in practice
Existing VMware VMs can be imported with standard tooling. The work that matters is around the move: planning storage (ZFS or Ceph), sizing the cluster, testing backup and restore on the new platform, and migrating host by host with a rollback path. Done properly, users never notice the switch.
FAQ
Common questions.
Is open source safe enough for production?
Proxmox VE has been in production use since 2008, with an enterprise repository, paid support and a very large install base. The components underneath (Debian, KVM, ZFS) run large parts of the internet. Maturity is not the risk here; unmanaged operation is.
Do we lose features compared to VMware?
For the features mid-sized environments actually use, no: clustering, HA, live migration, snapshots and backups are all covered. Some large-enterprise niche features differ, which is exactly why the decision starts with an inventory of what you actually use.
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