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KVM Logo
Read 39 KVM reviews
31,552 views|24,061 comparisons
90% willing to recommend
Proxmox Logo
57,328 views|38,908 comparisons
98% willing to recommend
Comparison Buyer's Guide
Executive Summary
Updated on Mar 24, 2022

We performed a comparison between KVM and Proxmox VE based on our users’ reviews in four categories. After reading all of the collected data, you can find our conclusion below.

  • Ease of Deployment: Most KVM and Proxmox VE users felt that the setup of both solutions was relatively easy and didn’t take long to deploy.
  • Features: Reviewers of KVM like the friendliness of the GUI but feel that the software is complex and not so scalable at the current time.

    Users of Proxmox VE liked that the software was easy to use, had good performance, and had a good backup service. However, users didn’t like that specific processes, like manually updating, weren't automatic. They also felt that moving things to the cloud was difficult and, because it's a young solution, there were some bugs.
  • Pricing: Users of KVMfelt that the licensing price was fair. Reviewers of Hyper-V felt the pricing was great, especially for customers working with budget restraints.
  • Service and Support: Half of the reviewers of KVM said they didn’t pay for support, so they relied on the community for any queries, while the rest relied on support vendors, and most were satisfied with the level of support. In contrast, most users of Proxmox VE were happy with the support, though there were a few who thought it needed improvement.

Comparison Results: Based on the parameters we compared, KVM and Proxmox VE had a similar user rating regarding ease of deployment, pricing, and service and support. When it came to features, reviewers felt KVM was complex and not scalable, while users of Proxmox VE were unhappy that certain processes weren’t automatic, and moving things to the cloud was difficult.

To learn more, read our detailed KVM vs. Proxmox VE Report (Updated: May 2024).
772,679 professionals have used our research since 2012.
Featured Review
Quotes From Members
We asked business professionals to review the solutions they use.
Here are some excerpts of what they said:
Pros
"I have found KVM to be scalable.""The initial setup was simple.""I find the density of the product most valuable. It is density that a technologist can just assign page merging. This is what makes KVM one of the important players of the virtualization market.""The performance is great.""Good screen and keyboard sharing feature.""One of the best features of KVM is its user-friendly interface.""The KVM service is well managed with a central policy interface.""The tool's most valuable feature is backup. The product makes it easy to manage virtual machines. Other tools require third-party applications like VMware and vSphere. However, KVM doesn't require these applications."

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"We can access the product from iPhone 7. It is stable and easy.""The solution's compatibility is very good with multiple operating systems. The moving systems are very good and migration is excellent. These are the most valuable features for us.""The whole solution is good. It has good tools that help me in managing the servers. It is also stable.""Proxmox is free, very stable, and doesn't require more resources for memory RAM. It's fine for a small data center.""The ability to back up a host and keep it running is valuable.""The feature that I have found most valuable is that its storage container, LVM, and everything else work out of the box.""We now have the ability to quickly build and deploy VM desktops for application testing with the snapshot ability to rollback, as required.""Less infrastructure required; simple to use."

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Cons
"I would like to see more focus on microservices and integration with Kubernetes or OpenShift.""The solution should be more user friendly. We are struggling with the command lines.""The only negative aspect of needing hardware support is a fully functional KVM can be dropped. It would be nice if the support for other platforms, like ARM or Risk, were as good as the x86 one. However, with the democratization of Chromebooks based on these chips and mobile devices, it will not take long for that to happen.""Support for VF is needed, where you can, for example, export from VMware to KVM.""The initial setup of this solution is more difficult than some of the competing products and it could be improved.""The product must provide better performance monitoring features.""The virtual manager and the graphical QEMU for KVM need some improvement.""I have previously used VMware and KVM is easier to use. However, they both have their strengths depending on their use cases. They are mostly equal. One of VMware's advantages is it has better support."

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"It would be nice to have total CPU and RAM allocations show for all VMs/CTs to avoid overloading an individual hypervisor.""The solution needs to improve its stability.""The availability of the solution could be a bit better.""If this solution could import directly from OVS format then it would make migration much easier.""The virtualizer in Proxmox VE could improve.""A feature which should be added is the ability to encrypt the main installation.""I would like to see more monitoring in the next release of this solution.""The only issue I have with Proxmox VE is updating it. You have to manually update it or you have to have a way to update it automatically."

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Pricing and Cost Advice
  • "​It is free and can be run from your laptop, if needed, unlike VMware.​"
  • "It is cheaper than other competitors like VMware or Hyper-V."
  • "It is cheaper than other solutions out there on the market."
  • "This solution came with the Linux license."
  • "This solution is an open-source, free platform with paid support."
  • "It is free for everyone."
  • "The price is fair compared to others. But in our local market, it's a problem to get budget approval from management. That's why they are trying to get those products so we can give them the price benefit. But if you consider the international market or other products, it's sometimes better than their price."
  • "We had some problems with the licensing."
  • More KVM Pricing and Cost Advice →

  • "An excellent choice for budget sensitive operations.​"
  • "The cost is excellent."
  • "Proxmox is free software, but if you prefer the support and a more rested repository then you can pay for it."
  • "Zero - this is a free solution."
  • "The only thing you pay for is support and it is between $2,500 and $3,000 a year. It depends on the support plan you choose. Support is optional."
  • "I am not aware of the licensing cost, but there is a cost for support."
  • "It's an open-source solution that can be used free of cost."
  • "Because I'm using Proxmox VE for personal use and it's an AGPL license project, I can use it at home for free."
  • More Proxmox VE Pricing and Cost Advice →

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    Answers from the Community
    Netanya Carmi
    WilVan Lierop - PeerSpot reviewerWilVan Lierop
    Real User

    In a marketing services-related company security is paramount.


    Therefore, you probably will rely on services, especially during maintenance of your network and need support for that.


    When it comes to security and support KVM would be the better option. With in-house engineers, both Proxmox VE and KVM could be chosen. But qualified engineers are hard to come by nowadays, depending on where you live.


    As a side note, I maintain mainly Xenserver, VMware and KVM. When it comes to performance per watt Xenserver would be the king, especially on larger setups. 


    Since your setup is of medium size and if you decided not to go for the aforementioned setups, KVM would be the lesser of the worse.


    Your question depends a lot on the hardware/cloud system you have in mind. More details would make my recommendations more precise.


    Kind regards,

    Syed Abid Hussain - PeerSpot reviewerSyed Abid Hussain
    Real User

    KVM is a kernel base hypervisor while Proxmox VE is open-source. Technically, Proxmox VE fulfills the smallest business users than KVM.

    And if we go for the quality and support KVM is better. 


    But Proxmox VE has also more features according to business growth.

    Questions from the Community
    Top Answer:KVM scales better, orchestration better, performs better and supports a wider range of hardware and, also, you can implement at ZERO cost and with a very powerful web interface for management, from… more »
    Top Answer:Small support team, small cluster, low core count, use VMware products Large support team, large clusters with many cores, use KVM KVM scales better, orchestration better, performs better and… more »
    Top Answer:Far from being an expert, my opinion is that the positive sides of KVM are: Lower costs and open-source which gives the abilities to customize it according to the specific needs of each customer.
    Top Answer:For me the biggest impact is the cost of licensing in the case of VMware despite its overall intuitiveness and ease of handling and management. However, KVM-based Open Source solutions are becoming… more »
    Top Answer:One of the best things about Proxmox VE is that it is open-source and very inexpensive. You get all of the same features as with the more well-known products. Proxmox VE is very easy to deploy - it… more »
    Top Answer:I use Proxmox VE and have been very happy with it. In my opinion, it is a complete and stable solution with excellent tools for managing servers. It has a lot of different features, and I also love… more »
    Ranking
    Views
    31,552
    Comparisons
    24,061
    Reviews
    15
    Average Words per Review
    450
    Rating
    8.2
    Views
    57,328
    Comparisons
    38,908
    Reviews
    25
    Average Words per Review
    419
    Rating
    8.6
    Comparisons
    Oracle VM VirtualBox logo
    Compared 14% of the time.
    Hyper-V logo
    Compared 12% of the time.
    VMware vSphere logo
    Compared 12% of the time.
    VMware Workstation logo
    Compared 11% of the time.
    Oracle VM logo
    Compared 10% of the time.
    Learn More
    KVM
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    Overview

    KVM stands for Kernel-based Virtual Machine, which is an open-source virtualization technology that is embedded in Linux. KVM allows users to seamlessly transform their Linux system into a hypervisor that, in turn, will enable a host machine to run numerous, isolated virtual environments or virtual machines (VMs).

    KVM is part of Linux. Users with Linux 2.6.20 or newer already have KVM. As KVM is already a component of the current Linux code, it automatically improves with every new Linux fix, feature, or upgrade. So KVM users are always current and up to date.

    KVM automatically transforms Linux to a type -1 (bare-metal) hypervisor. All hypervisors need operating system components, such as a process scheduler, I/O stack, device drivers, memory manager, and more, to run a VM. KVM already has these components embedded, as it is part of the Linux kernel. Each VM is generated as a basic Linux proces,s which is maintained by the standard Linux scheduler, with dedicated hardware such as a graphics adapter, memory, disks, network card, and CPUs.

    KVM Key Features:

    KVM has many valuable key features. Some of its most useful features include:

    • Storage: KVM has the ability to use any storage protocol supported by Linux, including network-attached storage (NAS) and some local disks. Multipath I/O can be utilized to provide redundancy and improve storage. Disk images use thin provisioning, ensuring storage is used on demand. KVM is also able to use shared file systems, enabling VM images to be shared on multiple hosts.
    • Hardware: KVM is able to use a vast number of Linux-certified supported hardware platforms. As hardware vendors routinely contribute to kernel improvement, the most up-to-date hardware features are generally quickly added to the Linux kernel.
    • Memory: KVM effectively utilizes the memory management features of Linux, such as kernel same-page emerging and non-uniform memory access. The memory of a VM can easily be switched, supported by large volumes for improved performance, then backed by a disk file or shared.
    • Migration: KVM actively supports live migration so users have the ability to move any running VM between physical hosts with no downtime.
    • Security: KVM uses a blend of secure virtualization (SVirt) and security-enhanced Linux (SELinux) for improved VM security and isolation. SELinux determines security boundaries surrounding VMs. sVirt expands SELinux’s processes, permitting Mandatory Access Control (MAC) security to be used for guest VMs and preventing any manual labeling issues.

    Reviews from Real Users

    “The most helpful aspect of KVM is the fact that the interface is so minimal. It includes just what you need to set up the VMs and manage them, and it's very simple to do so. KVM, as a native virtualization solution, is a complete and fully adequate system for small businesses that need to reduce costs, and also to make maintenance easier. “ - Georges E., Business Engineer and Consultant at All-Tech

    “The most valuable feature of KVM is the hypervisor environment and how we can configure it with ease. Additionally, the interface is intuitive.” Sonu S., Senior Solution Architect at Micro Focus

    Proxmox VE is a complete virtualization management solution for servers. It is a powerful open-source platform and supports two virtualization technologies - KVM (Kernel-based Virtual Machine) for virtual machines and LXC for containers. Proxmox VE has a central user interface that allows you to manage not only VMs and containers, but also storage resources, network configuration, and high availability for clusters. It is enterprise-ready and is valued for its scalability and maximum flexibility, enabling you to virtualize very demanding workloads. Proxmox VE makes it possible for you to easily install, manage, and monitor hyper-converged (HCI) data centers.

    Proxmox VE Key Features

    The Proxmox VE platform has many powerful features, including:

    pen-source software, high-available clusters, command line, fencing, a web-based management interface, flexible storage options, REST API, live/online migration, storage replication stack, software defined storage, virtualized networking, backup and restore, two-factor authentication, role-based administration, and VM templates and clones.

    Proxmox VE Benefits

    Some of the biggest benefits of Proxmox VE are:

    • Central management: To manage all tasks of your virtual data center, you can use the central, web-based management interface.

    • Unique multi-master design: Proxmox VE allows you to carry out maintenance tasks cluster wide, from any node.

    • Minimize downtime: With the integrated live/online migration feature, you can move running virtual machines from one Proxmox VE cluster node to another, without any downtime or noticeable effect from the end-user side.

    • Granular access: Using Proxmox VE’s role-based permission management system helps you define granular access to all objects.

    • Multiple authentication sources: Proxmox VE supports multiple authentication sources, including Linux PAM, an integrated Proxmox VE authentication server, LDAP, Microsoft Active Directory, and OpenID Connect.

    • Several storage options: The Proxmox VE storage model is very flexible and the web interface allows you to add multiple storage types (LVM Group, iSCSI target, NFS Share, SMB/CIFS, Ceph RBD, Direct to iSCSI LUN, GlusterFS, CephFS).

    • Collaboration with Ceph: Proxmox VE fully integrates Ceph, giving you the ability to run and manage Ceph storage directly from any of your cluster nodes.

    • Scheduled backups: With Proxmox VE, backups can be scheduled so that they automatically run on specific days and times, for selectable nodes and guest systems.

    • IT infrastructure protection: Proxmox VE has a built-in firewall that works to protect your IT infrastructure. The firewall is completely customizable, allowing complex configurations via the GUI or CLI.

    Reviews From Real Users

    Here is some feedback from some of our users who are currently using the solution:

    A PeerSpot user who is a director at a tech services company says, “The most valuable features of Proxmox VE are the ease of containerization. Overall the solution is generic, feature-rich, and has compatibility.”

    Another PeerSpot user who is a head of IT operations at a tech services company mentions that "In addition to the virtualization, the firewall and the routing functions that it provides are valuable."

    Deepen D., director and CTO at TechnoInfotech, expresses that "The feature that I have found most valuable is that its storage container, LVM, and everything else work out of the box."


    Sample Customers
    MediaWiki, Wikimedia Foundation, Wikipedia, Wikivoyage, Wikidata, Wikiversity, Commons
    Municipality of Trento, SwitchMIA, inDenova, Valmeita City Council, Alpha IT AS, Grupo Inversor Veracruzano S.A.P.I. de C.V. (GRIVER), Laut und Schoen, IT-Services - Hamburg e.K., KMI Learning, Dynacom Tankers Management Ltd., Serwise AG
    Top Industries
    REVIEWERS
    Computer Software Company25%
    Aerospace/Defense Firm13%
    Financial Services Firm13%
    Manufacturing Company13%
    VISITORS READING REVIEWS
    Computer Software Company16%
    Comms Service Provider10%
    Financial Services Firm8%
    Government8%
    REVIEWERS
    Government13%
    Retailer13%
    Computer Software Company13%
    University8%
    VISITORS READING REVIEWS
    Computer Software Company15%
    Comms Service Provider11%
    Government8%
    Educational Organization7%
    Company Size
    REVIEWERS
    Small Business54%
    Midsize Enterprise15%
    Large Enterprise32%
    VISITORS READING REVIEWS
    Small Business27%
    Midsize Enterprise18%
    Large Enterprise55%
    REVIEWERS
    Small Business68%
    Midsize Enterprise15%
    Large Enterprise17%
    VISITORS READING REVIEWS
    Small Business32%
    Midsize Enterprise19%
    Large Enterprise49%
    Buyer's Guide
    KVM vs. Proxmox VE
    May 2024
    Find out what your peers are saying about KVM vs. Proxmox VE and other solutions. Updated: May 2024.
    772,679 professionals have used our research since 2012.

    KVM is ranked 4th in Server Virtualization Software with 39 reviews while Proxmox VE is ranked 1st in Server Virtualization Software with 58 reviews. KVM is rated 8.0, while Proxmox VE is rated 8.6. The top reviewer of KVM writes "Delivers good performance because of kernel-based virtualization". On the other hand, the top reviewer of Proxmox VE writes "Easy to use and supports multi-monitors on multiple VMs in KVM". KVM is most compared with Oracle VM VirtualBox, Hyper-V, VMware vSphere, VMware Workstation and Oracle VM, whereas Proxmox VE is most compared with VMware vSphere, Oracle VM VirtualBox, Nutanix AHV Virtualization, Hyper-V and Citrix Hypervisor. See our KVM vs. Proxmox VE report.

    See our list of best Server Virtualization Software vendors.

    We monitor all Server Virtualization Software reviews to prevent fraudulent reviews and keep review quality high. We do not post reviews by company employees or direct competitors. We validate each review for authenticity via cross-reference with LinkedIn, and personal follow-up with the reviewer when necessary.