Proxmox VE
Austrian open-source virtualisation platform combining KVM, LXC, Ceph storage and backup in one product - the default destination for teams leaving VMware
Quick Overview
| Company | Proxmox Server Solutions GmbH |
|---|---|
| Category | Virtualization |
| Headquarters | Vienna, Austria |
| Founded | 2005 |
| EU Presence | Yes - Austria (EU) |
| Data Location | Your own infrastructure |
| Open Source | Yes (AGPLv3) |
| GDPR Compliant | Yes |
| Self-Hosting | Yes - self-hosted only |
| Main Features | KVM and LXC virtualisation, HA clustering, Ceph storage, built-in backup, ESXi import wizard, SDN, REST API |
| Pricing | Free (no feature limits) / support subscriptions from about EUR 115/CPU/year |
| Best For | Organisations replacing VMware vSphere without paying per-core licensing |
| Replaces | VMware vSphere, Hyper-V, Citrix Hypervisor |
Detailed Review
Proxmox VE became the default answer to "what replaces vSphere" for a straightforward reason: it bundles as standard what VMware licenses separately. Clustering, high availability, software-defined storage through Ceph, and backup are all in the base product, and the base product is free.
The company is Austrian, based in Vienna, and has been shipping since 2005 — this is not a recent reaction to Broadcom's pricing but a mature platform that suddenly found itself with a much larger addressable market.
What You Get Without Paying
The free version has no feature restrictions. Clustering across nodes, live migration, high availability, Ceph hyperconverged storage, snapshots, replication and the full REST API are all available. The paid subscription buys you the enterprise repository — more conservatively tested packages — and support, not features.
For a mid-sized estate, the difference between a Proxmox support subscription and a VMware core-based licence after the Broadcom repricing is frequently an order of magnitude.
Migrating from VMware
Proxmox ships an ESXi import wizard that connects directly to a vSphere host and pulls VMs across, handling the disk conversion for you. In practice the disk format is rarely the hard part of a migration — the work is re-creating networking, backup jobs, monitoring integrations and whatever your team built on top of the VMware ecosystem.
Teams that used vSAN and NSX heavily should plan those replacements explicitly: Ceph covers the storage side well, but the networking equivalent needs a deliberate design rather than a like-for-like swap.
Backup and Storage
Proxmox Backup Server is a separate but tightly integrated product offering deduplicated, incremental, encrypted backups with verification. Combined with Ceph for primary storage, an organisation can build a complete virtualisation stack from one vendor without adding a storage array or a third-party backup licence.
Third-party support has caught up too: Veeam now backs up Proxmox VE, which removes a common procurement objection.
Limitations to Consider
The web interface is functional rather than polished, and administrators used to vCenter will find some workflows less guided. Ceph needs to be designed properly — undersized networks or too few nodes produce disappointing performance and a bad first impression. There is no equivalent to NSX for advanced network virtualisation, and the ecosystem of third-party integrations, while growing quickly, remains smaller than VMware's.
Who Should Use Proxmox VE
Any organisation running a VMware estate that has looked at its renewal quote, plus hosting providers, universities and public sector bodies that want a virtualisation platform with no per-core licensing and full control over the stack.
Pros and Cons
Pros
- Clustering, Ceph and backup included at no cost
- ESXi import wizard for migration
- AGPLv3 open source with a European vendor
- Support subscription far cheaper than VMware
- Large, active community and documentation
Cons
- Interface less polished than vCenter
- Ceph needs careful sizing and design
- No direct NSX-equivalent networking
Alternatives to Proxmox VE
Other European virtualization worth comparing before you decide:
XCP-ng
France · Open-source Xen hypervisor with Xen Orchestra management
OpenNebula
Spain · Open-source cloud and edge virtualisation platform
SUSE Virtualization
Germany · Hyperconverged infrastructure built on Kubernetes and KubeVirt
Canonical OpenStack
United Kingdom · Fully supported OpenStack private cloud
See all European virtualization or compare them directly against VMware vSphere on our alternatives page.
Frequently Asked Questions
No. All features including clustering, high availability, Ceph and live migration are available for free. The paid subscription provides access to the enterprise package repository and vendor support, not extra functionality.
Yes. Proxmox VE includes an ESXi import wizard that connects to a vSphere host and imports VMs directly. Budget your migration time for networking, backup and monitoring rework rather than for the disk conversion itself.
It runs substantial production estates across European hosting providers, universities and public sector organisations, and commercial support is available from the Austrian vendor. The open-source licence is about cost and control, not about being unsupported.
Proxmox Backup Server provides deduplicated, incremental and encrypted backups with verification, integrated directly into the VE interface. Veeam also supports Proxmox VE if you already have that in place.