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Borg Backup vs K3s

Borg Backup logo

Borg Backup

Backup

Deduplicating archiver with compression and encryption

From
Free
Rated
-
Full reviewWebsite
K3s logo

K3s

Cloud

Lightweight certified Kubernetes distribution in a single binary

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Borg Backup linux, macOS and BSD only; Windows is not a supported platform; K3s the SQLite default is single-server only; highly available control planes need etcd or an external datastore, which removes much of the simplicity
  • They diverge on capability: Borg Backup covers Content-defined chunking, K3s covers Single binary.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Borg Backup and K3s actually diverge.

Attributes where Borg Backup and K3s differ
AttributeBorg BackupK3s
Pricing modelfreeOpen source, no licence fee
PlatformsLinux, MacLinux, ARM, Self-hosted
CategoryBackupCloud
Founded2015Unknown

Identical on both: starting price (Free), free tier (Yes), 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 Borg Backup

  • Content-defined chunking
  • Deduplication
  • Compression
  • Authenticated encryption
  • Pruning
  • Mount archives
  • SSH
  • BorgBase

Only in K3s

  • Single binary
  • SQLite by default
  • Certified conformant
  • Batteries included
  • Low resource footprint
  • Simple install

What people use each for

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

Borg Backup

  • Deduplicated backups where daily full snapshots would otherwise be expensivenot K3s
  • Encrypted backup to a server you do not fully trust, since the server never sees plaintextnot K3s
  • Browsing previous versions by mounting an archive over FUSEnot K3s
  • Scripted server backups with no agent or daemon to runnot K3s

K3s

  • Kubernetes on edge sites and IoT hardware where full clusters will not fitnot Borg Backup
  • Development and CI clusters that must start fast and cost nothingnot Borg Backup
  • Small production clusters where full Kubernetes is more operations than the workload justifiesnot Borg Backup
  • Teaching and learning Kubernetes without cloud spendnot Borg Backup

Where each one falls short

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

Borg Backup

  • Linux, macOS and BSD only; Windows is not a supported platform
  • Command-line only, with no graphical interface in the project itself
  • Version 2.0 is still in beta, so production use means staying on the 1.4 line
  • Restoring requires the Borg tooling, since archives are a deduplicated chunk store rather than plain files

K3s

  • The SQLite default is single-server only; highly available control planes need etcd or an external datastore, which removes much of the simplicity
  • Bundled components such as Traefik are opinionated defaults that larger teams often strip out and replace
  • Removed in-tree cloud provider integrations mean cloud-specific features need external controllers
  • Aimed at small and edge clusters, so very large deployments are better served by a standard distribution

Pricing, plan by plan

Borg Backup

Free
  • FreeFree
    • Deduplication
    • Compression
    • Encryption

K3s

Free
  • K3sFree
    • Full functionality
    • No usage limits
    • Community support

Which should you pick?

Choose Borg Backup if

  • You need content-defined chunking.
  • You want to start without paying.
  • You work on Linux, Mac.
  • You also want deduplication.
Borg Backup review

Choose K3s if

  • You need single binary.
  • You want to start without paying.
  • You work on Linux, ARM, Self-hosted.
  • You also want sqlite by default.
K3s review

Questions people ask

Is Borg Backup or K3s better?
Neither clearly leads. Borg Backup starts at Free and K3s at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Borg Backup or K3s?
Borg Backup starts at Free and K3s at Free.
Does Borg Backup or K3s run on more platforms?
Borg Backup runs on Linux, Mac. K3s runs on Linux, ARM, Self-hosted.
Can I use Borg Backup for free?
Both have a free tier, so you can try either at no cost before committing.
What is Borg Backup best used for?
Borg Backup is most often used for deduplicated backups where daily full snapshots would otherwise be expensive, encrypted backup to a server you do not fully trust, since the server never sees plaintext, browsing previous versions by mounting an archive over fuse, scripted server backups with no agent or daemon to run. Of those, deduplicated backups where daily full snapshots would otherwise be expensive and encrypted backup to a server you do not fully trust, since the server never sees plaintext are not what K3s is typically brought in for.
What can Borg Backup do that K3s cannot?
Borg Backup covers Content-defined chunking, Deduplication, Compression, Authenticated encryption. K3s covers Single binary, SQLite by default, Certified conformant, Batteries included.

Answered from the vendors’ own pages

Borg Backup: What is the cost of BorgBackup?

BorgBackup is completely free and open source under the BSD license with no mandatory costs for the core software.

Source
K3s: Is K3s free?

Yes. K3s is open source with no licence fee. SUSE sells commercial support around Rancher separately.

Borg Backup: Are there paid services available for BorgBackup?

Yes, optional third-party services are available: BorgBase for specialized Borg repository hosting, Hetzner Storage Box with Borg support, and rsync.net cloud storage integration.

Source
K3s: Is K3s real Kubernetes?

Yes. It is CNCF-certified conformant, so standard manifests, kubectl and Helm charts work without modification.

Borg Backup: How can I support the BorgBackup project?

BorgBackup accepts voluntary contributions through Open Collective, GitHub Sponsors, Liberapay, and PayPal, though donations are optional.

Source
K3s: Why is K3s smaller than Kubernetes?

It strips legacy, alpha and in-tree cloud provider code, packages everything as one binary, and defaults to SQLite instead of etcd.

K3s: Can K3s run in production?

Yes, and it does, particularly at the edge and for small clusters. For a highly available control plane you need to move off the SQLite default to etcd or an external datastore.

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