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File Storage · head to head

Ceph vs Proxmox VE

Ceph logo

Ceph

File Storage

Open source distributed storage providing object, block and file from one cluster

From
Free
Rated
-
Full reviewWebsite
Proxmox VE logo

Proxmox VE

Cloud

Open-source hypervisor combining KVM and LXC virtualisation

From
€120/year
Rated
-
Full reviewWebsite

The short version

  • Only Ceph has a free tier, so it costs nothing to try first.
  • Each has a real cost: Ceph ceph assumes an operator who understands placement groups, CRUSH rules and recovery tuning, so organisations without dedicated storage staff routinely end up with a cluster that works until the first failure and then does not.; Proxmox VE per-socket licensing model: cost scales with CPU socket count, not vCore count, resulting in high costs for multi-socket servers
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Ceph and Proxmox VE actually diverge.

Attributes where Ceph and Proxmox VE differ
AttributeCephProxmox VE
Starting priceFree€120/year
Pricing modelOpen source, no licence feesubscription
Free tierYesNo
PlatformsLinuxLinux, Web, API, Self-hosted
CategoryFile StorageCloud

Identical on both: user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Ceph

  • RADOS object store
  • RADOS Gateway
  • RBD block devices
  • CephFS
  • CRUSH placement
  • Erasure coded pools

Only in Proxmox VE

Nothing recorded that Ceph does not also cover.

What people use each for

The jobs each tool is most often brought in to do.

Ceph

  • Backing a private cloud where virtual machine disks, shared filesystems and an S3 endpoint all need the same hardwarenot Proxmox VE
  • Growing past the point where a proprietary array upgrade costs more than a rack of commodity serversnot Proxmox VE
  • Research and media environments with petabytes of data and staff who can operate storagenot Proxmox VE
  • Providing an S3 endpoint on premises with multi site replication under your own controlnot Proxmox VE

Proxmox VE

  • Open-source datacenter virtualisation for hosting providers and cloud platformsnot Ceph
  • Cost-sensitive enterprise virtualisation replacing commercial hypervisorsnot Ceph
  • High-availability clustering for disaster recovery and business continuitynot Ceph
  • Container deployments using LXC as lighter-weight alternative to Dockernot Ceph
  • Hybrid VM and container workloads in a single management interfacenot Ceph
  • Backup and archival infrastructure alongside primary virtualisationnot Ceph

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Ceph

  • Ceph assumes an operator who understands placement groups, CRUSH rules and recovery tuning, so organisations without dedicated storage staff routinely end up with a cluster that works until the first failure and then does not.
  • Small clusters are inefficient: three way replication means a third of raw capacity is usable, and erasure coding needs enough failure domains to be safe, so the economics only work above a certain size.
  • Recovery and rebalancing generate heavy internal traffic, so a failed disk can degrade client latency across the cluster unless backfill is throttled correctly beforehand.
  • Upgrades must follow a strict daemon order across monitors, managers, OSDs and gateways, and a mistake in that order on a live cluster is difficult to reverse.
  • Because it is self hosted, every byte served to the internet is transit you pay for on your own links, so the free licence does not mean free egress and bandwidth planning becomes your problem rather than the providers.

Proxmox VE

  • Per-socket licensing model: cost scales with CPU socket count, not vCore count, resulting in high costs for multi-socket servers
  • Linux-based host only; Windows hypervisors not supported, limiting adoption in Windows-focused organisations
  • Clustering and high-availability setup requires operational expertise and careful network configuration
  • Commercial support tiers limit advanced features (just-in-time access, network flow logs) to paid subscriptions
  • Smaller ecosystem of third-party plugins and integrations compared to VMware vSphere

Pricing, plan by plan

Ceph

Free
  • CephFree
    • Full functionality, no capacity limit
    • Object, block and file interfaces
    • Community support via mailing list and Slack

Proxmox VE

€120/year
  • Community$120/year
    • Enterprise Repository access
    • Community forum support only
    • Per-socket subscription model
  • Basic$370/year
    • 3 support tickets per year
    • 1 business day response time
    • Stable updates and Enterprise Repository
  • Standard$550/year
    • 10 support tickets per year
    • 4-hour response time for critical issues
    • Remote SSH support and offline updates
  • Premium$1100/year
    • Unlimited support tickets
    • 2-hour response time for critical issues
    • Remote SSH support and offline updates

Which should you pick?

Choose Ceph if

  • You need rados object store.
  • You want to start without paying.
  • You work on Linux.
  • You also want rados gateway.
Ceph review

Choose Proxmox VE if

  • You work on Linux, Web, API, Self-hosted.
Proxmox VE review

Questions people ask

Is Ceph or Proxmox VE better?
Neither clearly leads. Ceph starts at Free and Proxmox VE at €120/year, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Ceph or Proxmox VE?
Ceph has a free tier; the other does not. Paid plans start at Free for Ceph and €120/year for Proxmox VE.
Does Ceph or Proxmox VE run on more platforms?
Ceph runs on Linux. Proxmox VE runs on Linux, Web, API, Self-hosted.
Can I use Ceph for free?
Yes. Ceph has a free tier, so you can try it without paying. Proxmox VE starts at €120/year.
What is Ceph best used for?
Ceph is most often used for backing a private cloud where virtual machine disks, shared filesystems and an s3 endpoint all need the same hardware, growing past the point where a proprietary array upgrade costs more than a rack of commodity servers, research and media environments with petabytes of data and staff who can operate storage, providing an s3 endpoint on premises with multi site replication under your own control. Of those, backing a private cloud where virtual machine disks, shared filesystems and an s3 endpoint all need the same hardware and growing past the point where a proprietary array upgrade costs more than a rack of commodity servers are not what Proxmox VE is typically brought in for.
What can Ceph do that Proxmox VE cannot?
Ceph covers RADOS object store, RADOS Gateway, RBD block devices, CephFS.

Answered from the vendors’ own pages

Ceph: How many nodes do I need to start?

Three is the practical minimum for a replicated cluster with real fault tolerance, and most production advice starts at five once you account for maintenance windows.

Proxmox VE: What is the licensing model for Proxmox VE?

Proxmox VE is open-source and free to deploy. Optional subscription tiers provide technical support, priority response times, and access to the Enterprise Repository for stable update channels. All tiers include identical virtualisation features.

Source
Ceph: Is it faster than a SAN?

Not on single stream latency. It wins on aggregate throughput and on growing without a forklift upgrade, which is a different property from raw speed.

Proxmox VE: Can I run Proxmox VE without a support subscription?

Yes. Community Edition (€120/year per socket) provides Enterprise Repository access with community-based support through forums. The core Proxmox VE platform is fully functional without any subscription.

Source
Ceph: Can I buy support?

Yes. IBM sells IBM Storage Ceph and SUSE and others have offered supported builds; the upstream project itself is free.

Proxmox VE: What hypervisors does Proxmox VE support?

Proxmox VE includes both KVM for full virtualisation and LXC for Linux containers. It does not support Xen or Hyper-V. Workloads on those platforms must be migrated or reimplemented.

Source
Ceph: Should I use it just for S3?

If object is all you need, a dedicated object store is simpler to run. Ceph earns its complexity when you need block and file as well.

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