Softwr

Cloud · head to head

Terragrunt vs Skopeo

Terragrunt logo

Terragrunt

Cloud

The Open Source IaC Orchestrator Platform Teams Trust

From
Free
Rated
-
Full reviewWebsite
Skopeo logo

Skopeo

Cloud

Inspect, copy and sign container images without pulling them

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Terragrunt additional complexity layer on top of Terraform; Skopeo single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
  • They diverge on capability: Terragrunt covers Infrastructure orchestration, Skopeo covers Remote inspection.

Where they differ

Only the attributes on which Terragrunt and Skopeo actually diverge.

Attributes where Terragrunt and Skopeo differ
AttributeTerragruntSkopeo
Pricing modelUnknownOpen source, no licence fee
PlatformsAWS, Azure, GCPLinux, macOS

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated), category (Cloud).

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 Terragrunt

  • Infrastructure orchestration
  • Run Queue
  • DRY configuration
  • Automated hooks
  • Infrastructure catalog
  • Least-privilege access

Only in Skopeo

  • Remote inspection
  • Registry-to-registry copy
  • Format conversion
  • Image signing

What people use each for

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

Terragrunt

  • Organizing Terraform code across multiple environmentsnot Skopeo
  • Automating infrastructure deployment workflowsnot Skopeo
  • Implementing infrastructure as code templates for developer self-servicenot Skopeo

Skopeo

  • Promoting images between staging and production registries without a round tripnot Terragrunt
  • Inspecting an image’s contents before deciding to deploy itnot Terragrunt
  • Mirroring images into an air-gapped or internal registrynot Terragrunt

Where each one falls short

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

Terragrunt

  • Additional complexity layer on top of Terraform
  • Requires understanding of Terraform concepts
  • Paid tier pricing not clearly published

Skopeo

  • Single-purpose: it neither builds nor runs images, so it is one tool in a chain rather than a solution
  • Command syntax with transport prefixes such as docker:// is unusual and trips people up initially
  • Documentation is sparse compared with the rest of the container ecosystem

Pricing, plan by plan

Terragrunt

Free
  • Open SourceFree
    • Terragrunt CLI - completely free
    • Community support
  • Terragrunt Scale FreeFree
    • Free CI/CD pipeline
    • Unlimited runs and resources
    • For up to 25 infrastructure units
  • Terragrunt Scale Paid$undefined/custom
    • Volume pricing for more than 25 infrastructure units
    • Enterprise support

Skopeo

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

Which should you pick?

Choose Terragrunt if

  • You need infrastructure orchestration.
  • You want to start without paying.
  • You work on AWS, Azure, GCP.
  • You also want run queue.
Terragrunt review

Choose Skopeo if

  • You need remote inspection.
  • You want to start without paying.
  • You work on Linux, macOS.
  • You also want registry-to-registry copy.
Skopeo review

Questions people ask

Is Terragrunt or Skopeo better?
Neither clearly leads. Terragrunt starts at Free and Skopeo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Terragrunt or Skopeo?
Terragrunt starts at Free and Skopeo at Free.
Does Terragrunt or Skopeo run on more platforms?
Terragrunt runs on AWS, Azure, GCP. Skopeo runs on Linux, macOS.
Can I use Terragrunt for free?
Both have a free tier, so you can try either at no cost before committing.
What is Terragrunt best used for?
Terragrunt is most often used for organizing terraform code across multiple environments, automating infrastructure deployment workflows, implementing infrastructure as code templates for developer self-service. Of those, organizing terraform code across multiple environments and automating infrastructure deployment workflows are not what Skopeo is typically brought in for.
What can Terragrunt do that Skopeo cannot?
Terragrunt covers Infrastructure orchestration, Run Queue, DRY configuration, Automated hooks. Skopeo covers Remote inspection, Registry-to-registry copy, Format conversion, Image signing.

Answered from the vendors’ own pages

Terragrunt: Is Terragrunt free?

Yes, the Terragrunt CLI is completely free and open source. Terragrunt Scale offers a free tier for up to 25 infrastructure units.

Source
Skopeo: Is Skopeo free?

Yes, open source with no licence fee.

Terragrunt: What is the difference between Terragrunt and Terraform?

Terragrunt is an orchestration layer on top of Terraform that handles state management, DRY principles, and deployment automation without replacing Terraform itself.

Source
Skopeo: Why copy images without pulling them?

A registry-to-registry copy avoids downloading and re-uploading gigabytes, which is faster and much cheaper on bandwidth in CI.

Skopeo: Can Skopeo run containers?

No. It only inspects, copies, signs and deletes images. Running them is Podman’s or Docker’s job.

Share

Related pages

More on Terragrunt

More on Skopeo

Keep looking

Other head to heads