Softwr

Backup · head to head

IBM Storage Protect vs Proxmox Backup Server

IBM Storage Protect logo

IBM Storage Protect

Backup

Enterprise-scale data protection platform

From
$100/month
Rated
-
Full reviewWebsite
Proxmox Backup Server logo

Proxmox Backup Server

Backup

Deduplicating backup server for virtual machines, containers and Linux hosts, with verification built in

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Proxmox Backup Server has a free tier, so it costs nothing to try first.
  • Each has a real cost: IBM Storage Protect iBM United Kingdom Limited lists IBM Storage Protect for Cloud (Microsoft 365 edition) on G-Cloud 14 at £50.64 per user per year; Proxmox Backup Server there is no Windows client, so physical Windows machines must be backed up by something else and the estate ends up with two backup products.
  • They diverge on capability: IBM Storage Protect covers Progressive incremental backup, Proxmox Backup Server covers Deduplicated chunk store.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which IBM Storage Protect and Proxmox Backup Server actually diverge.

Attributes where IBM Storage Protect and Proxmox Backup Server differ
AttributeIBM Storage ProtectProxmox Backup Server
Starting price$100/monthFree
Pricing modelsubscriptionOpen source, no licence fee
Free tierNoYes
PlatformsWindows, Linux, WebLinux
Founded1911Unknown

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

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 IBM Storage Protect

  • Progressive incremental backup
  • Policy-based management
  • Container protection
  • Kubernetes support
  • Data deduplication
  • Instant restore
  • VMware
  • Hyper-V

Only in Proxmox Backup Server

  • Deduplicated chunk store
  • Incremental guest backups
  • Client side encryption
  • Verification jobs
  • Remote sync
  • Live restore and file level restore

What people use each for

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

IBM Storage Protect

  • Data protectionnot Proxmox Backup Server
  • Disaster recoverynot Proxmox Backup Server
  • Business continuitynot Proxmox Backup Server
  • Ransomware protectionnot Proxmox Backup Server
  • Compliancenot Proxmox Backup Server

Proxmox Backup Server

  • Backing up a Proxmox VE cluster with incremental block level backups of running guestsnot IBM Storage Protect
  • Replacing a backup product whose licence is priced per socket or per terabyte on a virtualisation estatenot IBM Storage Protect
  • Proving backup integrity on a schedule rather than discovering corruption during a restorenot IBM Storage Protect
  • Keeping an encrypted second copy on a remote server or on tape without a third party servicenot IBM Storage Protect

Where each one falls short

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

IBM Storage Protect

  • IBM United Kingdom Limited lists IBM Storage Protect for Cloud (Microsoft 365 edition) on G-Cloud 14 at £50.64 per user per year

Proxmox Backup Server

  • There is no Windows client, so physical Windows machines must be backed up by something else and the estate ends up with two backup products.
  • The datastore is millions of small chunk files, so it needs storage with real input and output capability and performs poorly on a single spinning disk or an SMB or NFS share.
  • Deduplication is per datastore, so splitting workloads across datastores for retention or tenancy reasons multiplies the storage those workloads consume.
  • Garbage collection depends on file access time semantics on the underlying filesystem, so a datastore mounted with the wrong options can fail to reclaim space or, worse, behave unpredictably.
  • Subscriptions are priced per CPU socket per year, so a backup server consolidated onto fewer larger dual socket machines pays twice per host for the supported repository.

Pricing, plan by plan

IBM Storage Protect

$100/month
  • Storage Protect$100/month
    • Progressive incremental
    • Container support
    • Policy automation

Proxmox Backup Server

Free
  • No subscriptionFree
    • Full functionality with no capacity limit
    • Community package repository
    • Community forum support
  • Subscription$undefined/year
    • Priced per CPU socket per year
    • Access to the enterprise package repository
    • Vendor support tickets

Which should you pick?

Choose IBM Storage Protect if

  • You need progressive incremental backup.
  • You work on Windows, Linux, Web.
  • You also want policy-based management.
IBM Storage Protect review

Choose Proxmox Backup Server if

  • You need deduplicated chunk store.
  • You want to start without paying.
  • You work on Linux.
  • You also want incremental guest backups.
Proxmox Backup Server review

Questions people ask

Is IBM Storage Protect or Proxmox Backup Server better?
Neither clearly leads. IBM Storage Protect starts at $100/month and Proxmox Backup Server at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, IBM Storage Protect or Proxmox Backup Server?
Proxmox Backup Server has a free tier; the other does not. Paid plans start at $100/month for IBM Storage Protect and Free for Proxmox Backup Server.
Does IBM Storage Protect or Proxmox Backup Server run on more platforms?
IBM Storage Protect runs on Windows, Linux, Web. Proxmox Backup Server runs on Linux.
Can I use Proxmox Backup Server for free?
Yes. Proxmox Backup Server has a free tier, so you can try it without paying. IBM Storage Protect starts at $100/month.
What is IBM Storage Protect best used for?
IBM Storage Protect is most often used for data protection, disaster recovery, business continuity, ransomware protection. Of those, data protection and disaster recovery are not what Proxmox Backup Server is typically brought in for.
What can IBM Storage Protect do that Proxmox Backup Server cannot?
IBM Storage Protect covers Progressive incremental backup, Policy-based management, Container protection, Kubernetes support. Proxmox Backup Server covers Deduplicated chunk store, Incremental guest backups, Client side encryption, Verification jobs.

Answered from the vendors’ own pages

Proxmox Backup Server: Can it back up machines that are not on Proxmox?

Linux hosts yes, through the client, at file level. Other hypervisors and physical Windows machines are outside its scope.

Proxmox Backup Server: Is a subscription required?

No. Without one you use the community repository and forum support. The subscription buys the tested enterprise repository and vendor tickets.

Proxmox Backup Server: How do I know a backup will restore?

Run verification jobs. They re-read the stored chunks and mark snapshots verified or failed, which is stronger evidence than a successful backup log.

Proxmox Backup Server: What storage should the datastore be on?

Local disks, ideally with ZFS and enough input and output capacity for many small files. Network shares are supported but routinely disappointing.

Share

Related pages

More on IBM Storage Protect

More on Proxmox Backup Server

Keep looking

Other head to heads