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Backup · head to head

Kopia vs Panzura

Kopia logo

Kopia

Backup

Open source deduplicating backup with client side encryption and a repository on almost any storage

From
Free
Rated
-
Full reviewWebsite
Panzura logo

Panzura

File Storage

Global file system putting one namespace over object storage across sites

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Kopia has a free tier, so it costs nothing to try first.
  • Each has a real cost: Kopia space is only reclaimed when maintenance runs, and in a shared repository full maintenance is owned by one client, so if that machine goes away the repository grows for ever while every backup still reports success.; Panzura cloud egress charges apply whenever data is read from the object store into a site that has not cached it, and organisations routinely discover this during a restore or a new site rollout rather than during procurement.
  • They diverge on capability: Kopia covers Content defined chunking, Panzura covers Global file system.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Kopia and Panzura actually diverge.

Attributes where Kopia and Panzura differ
AttributeKopiaPanzura
Starting priceFreeOn request
Pricing modelOpen source, no licence feequote
Free tierYesNo
PlatformsLinux, macOS, Windows, DockerLinux, Windows, Web
CategoryBackupFile Storage

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 Kopia

  • Content defined chunking
  • Global deduplication
  • Pack blobs
  • Client side encryption
  • Desktop and command line
  • Repository verification

Only in Panzura

  • Global file system
  • Global file locking
  • Local caching filers
  • Deduplication
  • Immutable snapshots
  • Cloud mirroring
  • Symphony data services

What people use each for

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

Kopia

  • Backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron jobnot Panzura
  • Deduplicating backups of several similar machines into one repository so common content is stored oncenot Panzura
  • Replacing a chunk based tool whose per object charges made a cheap bucket expensivenot Panzura
  • Keeping an encrypted offsite copy where the storage provider must never be able to read the contentsnot Panzura

Panzura

  • An architecture firm with offices in three cities working on the same Revit models without copy conflictsnot Kopia
  • A media company consolidating project storage into object storage while keeping editors on a normal SMB sharenot Kopia
  • A manufacturer replacing per-site NAS filers and the backup estate that came with themnot Kopia
  • An organisation that needs immutable snapshots of unstructured file data as a ransomware recovery positionnot Kopia

Where each one falls short

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

Kopia

  • Space is only reclaimed when maintenance runs, and in a shared repository full maintenance is owned by one client, so if that machine goes away the repository grows for ever while every backup still reports success.
  • The repository format has changed across versions and mixing client versions against one repository is discouraged, so a fleet must be upgraded together rather than machine by machine.
  • There is no central orchestration or reporting for many machines, so monitoring a fleet means building your own alerting around exit codes.
  • Restoring many small files is slower than the backup was, because content must be reassembled from pack blobs, and this is rarely tested until the day it matters.
  • Encryption is client side with no escrow, so a lost repository password means the data is unrecoverable and there is no vendor to appeal to.

Panzura

  • Cloud egress charges apply whenever data is read from the object store into a site that has not cached it, and organisations routinely discover this during a restore or a new site rollout rather than during procurement.
  • Performance depends entirely on cache hit rates, so a team that works across the whole dataset rather than a hot subset sees latency that a local NAS would not have produced.
  • Licence cost is only part of total cost; object storage capacity, per-site filer nodes and egress all sit outside the vendor quote and can exceed it.
  • Recovery of a very large dataset is bounded by your internet link and by egress cost, so the practical recovery time after a site loss is often much longer than the snapshot policy implies.
  • Encryption keys can be held by the customer, but organisations that accept vendor-managed defaults give up the ability to render the object store unreadable independently, which some regulators now ask about explicitly.

Pricing, plan by plan

Kopia

Free
  • KopiaFree
    • Full functionality, no data limit
    • Desktop application included
    • Any supported storage back end

Panzura

On request
  • Panzura CloudFS$undefined/year
    • Priced by usable capacity under management
    • Filer nodes licensed per site, physical or virtual
    • Object storage and cloud egress billed by your cloud provider separately

Which should you pick?

Choose Kopia if

  • You need content defined chunking.
  • You want to start without paying.
  • You work on Linux, macOS, Windows, Docker.
  • You also want global deduplication.
Kopia review

Choose Panzura if

  • You need global file system.
  • You work on Linux, Windows, Web.
  • You also want global file locking.
Panzura review

Questions people ask

Is Kopia or Panzura better?
Neither clearly leads. Kopia starts at Free and Panzura at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Kopia or Panzura?
Kopia has a free tier; the other does not. Paid plans start at Free for Kopia and On request for Panzura.
Does Kopia or Panzura run on more platforms?
Kopia runs on Linux, macOS, Windows, Docker. Panzura runs on Linux, Windows, Web.
Can I use Kopia for free?
Yes. Kopia has a free tier, so you can try it without paying. Panzura starts at On request.
What is Kopia best used for?
Kopia is most often used for backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron job, deduplicating backups of several similar machines into one repository so common content is stored once, replacing a chunk based tool whose per object charges made a cheap bucket expensive, keeping an encrypted offsite copy where the storage provider must never be able to read the contents. Of those, backing up laptops and workstations to cheap object storage with a desktop interface rather than a cron job and deduplicating backups of several similar machines into one repository so common content is stored once are not what Panzura is typically brought in for.
What can Kopia do that Panzura cannot?
Kopia covers Content defined chunking, Global deduplication, Pack blobs, Client side encryption. Panzura covers Global file system, Global file locking, Local caching filers, Deduplication.

Answered from the vendors’ own pages

Kopia: Is a partly corrupt repository still restorable?

Partly. Deduplication means one damaged pack blob affects every snapshot referencing its contents, but unaffected files still restore. Run verification regularly rather than assuming.

Panzura: Who holds the encryption keys?

Customer-managed keys are supported. Insist on them if you need the ability to revoke access to the object store independently of the vendor, and confirm the key custody model in writing.

Kopia: How does it compare with restic?

Similar guarantees, with packing that behaves better on per operation billing, a desktop interface, and compression enabled by default.

Panzura: What does it actually cost to run?

Model three things: the Panzura subscription, the object storage capacity, and cloud egress. The third is the one that catches buyers out during restores and site bring-ups.

Kopia: Do I need to run maintenance manually?

It is scheduled automatically by default, but you must ensure the client that owns full maintenance keeps running, otherwise deleted snapshots never free space.

Panzura: Does it replace backup?

Immutable snapshots cover many recovery scenarios, but confirm your retention and compliance requirements before removing an existing backup product.

Kopia: Can several machines share one repository?

Yes, and that is where deduplication pays off, but they should run compatible versions and only one owns full maintenance.

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