Since Broadcom acquired VMware, the cost and structure of running vSphere have changed sharply, and many teams are now evaluating alternatives. Proxmox VE has become the most common destination. This guide explains why the shift is happening, how a VMware to Proxmox migration actually works, the pitfalls to plan for, and where the workloads should live afterwards.
Why teams are leaving VMware
The move is driven by licensing and cost, not dissatisfaction with the technology itself. Since the Broadcom acquisition, the commercial terms have changed in ways that hit smaller and mid-sized estates hardest:
- Perpetual licences have been discontinued. VMware is now sold on subscription only, and existing perpetual licences stop receiving patches and support once the current contract ends.
- Products were consolidated into a few large bundles, which reduces flexibility and raises the entry price for teams that only used part of the stack.
- A 16-core-per-CPU minimum applies, so small hosts pay for capacity they do not use.
- Independent analyses put the subscription model at roughly 60% more expensive over a typical multi-year lifecycle once renewals and minimums are included.
- Most existing support contracts lapse by late 2027, which is setting the timeline for many migration decisions.
For organisations weighing the renewal against the alternatives, the question has shifted from “should we move” to “what do we move to, and when”.
What is Proxmox VE?
Proxmox Virtual Environment is an open-source virtualisation platform built on KVM for virtual machines and LXC for containers. It includes clustering, high availability, software-defined storage through ZFS and Ceph, and built-in backup and replication, without per-core licensing. Commercial support is available through an optional subscription, but the platform itself is open and free to run.
For most server virtualisation use cases, it covers the same ground as vSphere: live migration, snapshots, HA failover, centralised management and role-based access.
VMware vs Proxmox: a quick comparison
| Area | VMware vSphere | Proxmox VE |
|---|---|---|
| Licensing | Subscription only, per-core minimums | Open source, optional support subscription |
| Virtualisation | ESXi hypervisor | KVM (VMs) and LXC (containers) |
| Storage | vSAN, VMFS | ZFS, Ceph, NFS, iSCSI |
| High availability | Mature, built in | Built in, cluster-based |
| Backup | Add-on products | Proxmox Backup Server, included |
| Cost trajectory | Rising | Predictable |
Proxmox is not a drop-in clone of vSphere. Some advanced VMware features and third-party integrations do not have exact equivalents, which is why the assessment step below matters.
How a VMware to Proxmox migration works
A controlled migration runs in four stages:
01 / Assess
Inventory every VM, its resources, dependencies and any VMware-specific features in use (vSAN, NSX, specific backup or monitoring integrations). This is where you confirm what maps cleanly to Proxmox and what needs a different approach.
02 / Plan the target
Design the Proxmox cluster: node sizing, storage (ZFS for smaller clusters, Ceph for scale), networking, high availability and backup. Decide on the cutover sequence, starting with low-risk workloads.
03 / Migrate the VMs
Proxmox includes an import wizard that connects to vCenter or ESXi and imports VMs directly, converting the virtual disks. Windows guests need the VirtIO drivers installed for disk and network performance. Each VM is validated before the next batch.
04 / Validate and cut over
Test performance, networking, backups and failover on the migrated workloads, then switch production over during a planned window. Keep the VMware environment available as a rollback until the new platform is proven.
Pitfalls to plan for
- Windows drivers: forgetting VirtIO drivers is the most common cause of poor performance or boot issues after import.
- Networking: VLANs, bonds and firewall rules need to be re-mapped deliberately, not assumed.
- Backups: a migration is the moment to rebuild a proper backup and disaster recovery strategy, not to copy the old one over.
- Storage design: Ceph is powerful but needs correct sizing and at least three nodes to be resilient.
- Team readiness: Proxmox is straightforward, but your team needs time and training to operate it confidently.
When Proxmox is, and is not, the right move
Proxmox fits most server virtualisation estates, especially where cost predictability and data control matter. It is a strong fit if you are facing a large VMware renewal, run mainstream Linux and Windows workloads, or want to keep data on sovereign infrastructure. It is less straightforward if you depend heavily on VMware-specific tooling such as NSX or deep vSAN features, or on third-party products that only integrate with vSphere. An honest assessment up front avoids surprises later.
Still weighing your options? Compare the field in our guide to the best VMware ESXi alternatives.
Migrate with EXEO
EXEO is a Proxmox partner and we run our own sovereign cloud infrastructure. We handle the migration end to end, from assessment and cluster design through to cutover, and we can host the result on infrastructure that keeps your data in your jurisdiction. After migration we operate the platform for you, including business continuity and disaster recovery and ongoing managed services. If you are weighing a VMware renewal, we can model the alternative before you commit.
Frequently Asked Questions
Is Proxmox ready for production and enterprise workloads?
Yes. Proxmox VE runs production workloads with clustering, high availability, live migration and enterprise storage. Commercial support subscriptions are available for organisations that require an SLA.
How long does a VMware to Proxmox migration take?
It depends on the number of VMs and the complexity of storage and networking. We set a precise timeline during the assessment phase and migrate in batches to limit risk.
Will there be downtime?
Most VMs are migrated with minimal downtime, scheduled per workload. Critical systems are cut over during planned windows, with the VMware environment kept as a rollback until the migration is validated.
We also support your path to ISO 27001 certification.
Can we keep our data in our country?
Yes. We can host the migrated environment on our sovereign cloud, keeping production data and backups within your jurisdiction.
Do we have to move everything at once?
No. Migrations run in phases, starting with low-risk workloads, so you can validate the platform before moving critical systems.
Talk to our team
Facing a VMware renewal or planning your exit? Our team will assess your environment and propose a Proxmox migration and hosting plan tailored to your workloads and compliance needs.
