Key Takeaways
- Since Broadcom’s acquisition, VMware licensing is sold entirely by subscription, priced per core, with a minimum of 16 cores per CPU socket and 72 cores per contract, regardless of your actual environment size.
- Missing your VMware renewal anniversary date triggers a 20% late-renewal surcharge with no grace period.
- Proxmox VE is free to use, with optional paid support subscriptions priced per physical CPU socket (not per core) starting at around £100 a year and rising to around £935 a year for the top enterprise tier.
- Proxmox can import VMware ESXi virtual machines directly into its management console, which significantly reduces manual migration effort.
- Proxmox is not a like-for-like replacement for vCenter, and moving to it successfully depends on your team having (or bringing in) Linux administration experience.
- Veeam already supports Proxmox VE for backup and recovery, though its integration is newer and less mature than its VMware or Hyper-V support.
Quick Answer: What’s the Difference Between Proxmox and VMware?
Proxmox VE is a free, open-source virtualisation platform that businesses can run without a licence fee, with optional paid support subscriptions. VMware is now a subscription-only platform from Broadcom, licensed per CPU core with strict minimum purchase requirements. The practical difference for most UK SMEs comes down to cost and control: Proxmox charges for the support level you choose. At the same time, VMware’s current licensing model applies minimum core and contract thresholds regardless of how much compute you actually use.
“We’ve had more conversations about VMware licensing in the last eighteen months than in the previous decade combined. For most of our clients, the maths on staying simply doesn’t work anymore for a business their size.” Graham Gray, Systems Engineer, Nexus Open Systems
Why UK Businesses Are Reconsidering VMware in 2026
The VMware licensing changes introduced after Broadcom completed its acquisition of the company in November 2023 have significantly altered the cost of running many virtualised environments. Perpetual licences are gone. Every VMware environment is now billed on a subscription, priced per core rather than per CPU socket, with two minimum thresholds applied to every contract: at least 16 cores must be licensed per physical CPU socket, and at least 72 cores must be licensed per contract in total, even if your actual server estate is smaller.
For a business running two servers with a combined 64 physical cores, that means paying for a 72-core contract regardless of what’s actually installed. Broadcom no longer publishes public list pricing for vSphere Standard or VMware Cloud Foundation; quotes are only available through accredited partners, so the real number for your business depends on your reseller and your commitment term. What is publicly confirmed is the structure of the minimums and the fact that missing your renewal anniversary date triggers a 20% late renewal surcharge with no grace period.
None of this means VMware is the wrong choice for every business. Larger environments already committed to VMware Cloud Foundation, or those relying on vSAN and NSX, often still get good value from the platform. The businesses feeling the most pressure are smaller environments on vSphere Standard, exactly the size of business that the 72-core minimum was not designed around.
As a result, many organisations are now reviewing VMware alternatives before committing to another renewal. For some, Proxmox VE offers the right balance of functionality and cost. Others may find Hyper-V or Azure Stack HCI better suited to their existing Microsoft infrastructure. The right choice depends on your workloads, support requirements and long-term IT strategy.
Related Reading: VMware to Proxmox VE or Azure Stack HCI: Your Best Options After the Broadcom Changes
What Is Proxmox VE?
Proxmox VE is an open-source virtualisation platform that manages both virtual machines and lightweight containers from a single web-based interface. It’s built on Debian Linux, supports clustering and high availability, and has become one of the most commonly recommended alternatives for businesses reassessing their VMware or Hyper-V environments. It doesn’t attempt to replicate every part of VMware’s product suite. Still, for straightforward server virtualisation, the feature set is mature enough for production use across SMEs and larger organisations alike.
Proxmox VE combines the KVM hypervisor for virtual machines with Linux Containers (LXC), allowing organisations to manage both traditional server workloads and lightweight containerised applications from the same platform. Because it’s open source, businesses have far greater flexibility over licensing, hardware compatibility, and long-term infrastructure planning than with proprietary virtualisation platforms.
Proxmox vs VMware: Cost Comparison
Proxmox VE itself is free. Optional paid support subscriptions use a per-physical socket model, a meaningful contrast to VMware’s per-core approach, across four tiers: Community at around £100 a year, Basic at around £315 a year, Standard at around £470 a year, and Premium at around £935 a year, each per socket, with response times and ticket allowances increasing at each level.
Note: Proxmox publishes its subscription pricing in euros (€120, €370, €550 and €1,100 per year, respectively), so the GBP figures here are indicative and will move with the exchange rate; it is worth confirming the exact cost at the time of purchase.
To put that in context: a modest three-host cluster with two CPU sockets per host, six sockets in total, would cost between roughly £610 a year on the Community tier and £5,610 a year on Premium, with Basic (around £1,890 a year across six sockets) or Standard (around £2,805 a year) the realistic choice for most SMEs needing genuine support cover. Compare that to VMware, where the same environment would likely fall under the 72-core minimum contract regardless of how many cores it actually uses, meaning cost is driven by contract minimums rather than real-world usage.
Not sure what your VMware renewal actually requires, or whether Proxmox fits your environment?
Book a VMware migration consultation with Nexus Open Systems, and we’ll review your current licensing position, core count and support needs before you commit to a renewal.
Proxmox vs VMware vs Hyper-V: Feature Comparison
The table below highlights how Proxmox compares structurally against VMware vSphere and Microsoft Hyper-V.
| Feature | Proxmox VE | VMware (vSphere) | Hyper-V |
|---|---|---|---|
| Licensing | Free, with optional paid support | Subscription only, priced per core with contract minimums | Included with Windows Server |
| Management interface | Single web console for VMs and containers | Extensive, requires separate licensing for full feature set | Included with Windows Server |
| Storage flexibility | ZFS, Ceph, NFS, iSCSI, local storage | Broad, but features increasingly gated by edition | Storage Spaces Direct |
| Container support | Native LXC containers | Limited, via Tanzu | Limited Windows Containers |
| Clustering and HA | Built in at no extra cost | Included, subject to licensing tier | Included with Windows Server |
Migrating from VMware to Proxmox: What Actually Happens
Proxmox can connect directly to an existing VMware ESXi host and import virtual machines through its own management console, eliminating much of the manual reconfiguration that migrations typically require. It has native support for VMware’s paravirtualised hardware, including VMXNET3 network adapters and PVSCSI storage controllers, and can read VMware’s VMDK disk format directly.
In practice, a migration typically follows the same pattern each time: connect the VMware host’s credentials into Proxmox, select the virtual machines to import, let Proxmox handle the CPU, memory, storage and networking configuration automatically, and confirm the imported VMs start correctly before installing the VirtIO and QEMU drivers that give the best long-term performance. Less critical systems are usually migrated first to validate the process before anything business-critical moves across.
Every environment is different, which is why Nexus begins with a discovery and planning phase before any production workloads move. Existing backups, disaster recovery arrangements, networking, licensing, and business-critical applications are all reviewed to ensure the migration plan reflects your operational requirements rather than a generic checklist.
Is Proxmox a Drop-In Replacement? What to Consider First
Proxmox is a capable platform, but it isn’t a one-to-one replacement for a full VMware vSphere and vCenter stack, and it’s worth being honest about that before recommending a switch. A few things are worth weighing up properly rather than discovering midway through a migration.
Proxmox is Debian-based, so your team (or your IT partner) needs genuine comfort with Linux administration on top of any VMware background they already have. Disk format conversion from VMDK to QCOW2 or RAW is a real piece of migration work that requires planning, particularly for larger or more complex virtual machines, rather than something that happens automatically. And while Veeam now supports Proxmox VE for backup and recovery, that integration is newer than its VMware or Hyper-V support, so it’s worth confirming exactly what’s covered before assuming feature parity.
None of this rules Proxmox out. It means the decision should rest on a proper review of your environment and your team’s skills, with the price difference as one factor among several.
“The businesses who get the most out of a Proxmox migration are the ones that treat it as a proper infrastructure project with a realistic timeline, rather than a same-weekend swap. Get the review right first, and the migration itself is usually the easy part.” Chris Wilson, Systems and Compliance Officer, Nexus Open Systems
Related reading: What Is a Managed SOC and Does Your Business Need One in 2026?
Backup and Disaster Recovery for Proxmox VE
We recommend Veeam as the backup and recovery platform for protecting client environments. Its Proxmox VE support already covers a meaningful amount of ground: creating and restoring backups of Proxmox VMs, restoring VMware, Hyper-V, Nutanix AHV and physical machine backups into Proxmox, exporting disks to VMDK or VHDX formats, and application-aware backups through Veeam agents deployed inside Proxmox VMs.
One gap is worth flagging directly. Replication for disaster recovery is not yet supported for Proxmox VE through Nexus Cloud Connect Backup and Disaster Recovery. Businesses that specifically need replication, rather than backup and restore, should factor that into the decision or maintain their existing hypervisor until support matures.
Related reading: Business Continuity Plan Checklist for UK Businesses in 2026
Signs It’s Worth Reviewing Your Virtualisation Platform
A licensing change doesn’t automatically mean you should migrate. However, the following situations often make it worthwhile to review your virtualisation platform before committing to another VMware subscription.
- Your VMware renewal is due within the next 12 months, and you don’t yet know your true core count against the new licensing minimums.
- You’ve missed, or are at risk of missing, your renewal anniversary date and the 20% late surcharge that comes with it.
- You’re planning an infrastructure refresh anyway, which is the natural point to reassess your virtualisation platform rather than renewing by default.
- Your current environment is small enough that the 72-core contract minimum means you’re paying for capacity you don’t use.
- You want a genuinely independent review of your options before committing to a multi-year VMware term.
How Nexus Open Systems Supports Your Migration
Nexus provides VMware migration services for businesses reassessing their virtualisation platform, including licence and core-count review, migration planning, and hands-on execution. These sit alongside our wider IT infrastructure management and managed IT support services, so your virtualisation platform stays looked after as part of your ongoing IT, with clear ownership rather than a project nobody revisits once it’s live.
We’ll review your current infrastructure, VMware licensing position and future requirements, then recommend the most appropriate path for your business.
Proxmox vs VMware FAQs
Here are quick answers to the questions we hear most often from businesses weighing up Proxmox against VMware.
Is Proxmox VE really free to use?
Yes. The core software is free and open-source. Paid subscriptions are optional and provide access to the stable Enterprise Repository and official support; they aren’t required to run Proxmox in production.
Is Proxmox a good alternative to VMware for a small business?
For straightforward server virtualisation without dependencies on vSAN, NSX, or VMware-specific tooling, Proxmox is a realistic option for most SMEs. The right choice still depends on your team’s Linux experience and your backup and disaster recovery requirements.
Can I migrate from VMware to Proxmox without downtime?
Individual virtual machines can typically be imported with limited disruption, and migrating less critical systems first is standard practice. A full cluster migration should still be planned and tested properly rather than treated as a same-day switch.
Does Proxmox support Veeam backups?
Yes, Veeam supports backup and restore for Proxmox VE, including restoring from VMware, Hyper-V and other platforms into Proxmox. Replication for disaster recovery is not yet supported specifically for Proxmox VE.
What happens if I miss my VMware renewal date?
Broadcom applies a 20% surcharge on your first-year subscription cost, backdated to the date your subscription lapsed. There is no grace period, which makes tracking your renewal anniversary date a genuine priority rather than an administrative afterthought.
Do I need Linux experience to run Proxmox?
Some experience is strongly recommended. Proxmox is Debian-based, and while the web interface handles most day-to-day management, troubleshooting and advanced configuration benefits from genuine Linux familiarity, whether that sits with your internal team or your IT partner.
Is Proxmox suitable for larger enterprise environments, or only SMEs?
Proxmox is used at a meaningful scale, including large multi-node clusters. Larger organisations already invested in VMware Cloud Foundation’s integrated networking and storage stack often have less incentive to move, but that’s a question of current investment rather than a limit on what Proxmox can handle.
Ready to Review Your Options Before You Renew?
Whether you’re weighing up Proxmox, staying on VMware, or considering Hyper-V or Azure Stack HCI instead, the decision is easier with a clear view of your actual core count, support needs and renewal timeline in front of you.
Book a VMware migration consultation with Nexus Open Systems, and we’ll give you a straight answer on what fits your business, before your renewal date decides for you.
Article Sources
- Trustmarque. VMware Licensing Changes UK 2026: What IT Teams Actually Need to Know. March 30th, 2026
- Proxmox Server Solutions GmbH. Proxmox VE Subscriptions and Pricing. Accessed July 22nd, 2026
- Veeam. Proxmox VE Backup Guide. January 29th, 2026