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Cloud · head to head

Rancher vs Terragrunt

Rancher logo

Rancher

Cloud

Kubernetes management platform for multiple clusters

From
Free
Rated
-
Full reviewWebsite
Terragrunt logo

Terragrunt

Cloud

The Open Source IaC Orchestrator Platform Teams Trust

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Rancher another platform to run and keep available, and an outage in it affects access to everything it manages; Terragrunt additional complexity layer on top of Terraform
  • They diverge on capability: Rancher covers Multi-cluster management, Terragrunt covers Infrastructure orchestration.

Where they differ

Only the attributes on which Rancher and Terragrunt actually diverge.

Attributes where Rancher and Terragrunt differ
AttributeRancherTerragrunt
Pricing modelOpen source, no licence feeUnknown
PlatformsKubernetes, Linux, Docker, Self-hostedAWS, Azure, GCP

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 Rancher

  • Multi-cluster management
  • Centralised RBAC
  • Cluster provisioning
  • App catalogue

Only in Terragrunt

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

What people use each for

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

Rancher

  • Operating many Kubernetes clusters with consistent access controlnot Terragrunt
  • Managing clusters across more than one cloud provider from one interfacenot Terragrunt
  • Edge deployments with many small clusters, typically alongside K3snot Terragrunt

Terragrunt

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

Where each one falls short

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

Rancher

  • Another platform to run and keep available, and an outage in it affects access to everything it manages
  • Meaningful overhead if you only operate one or two clusters
  • Version compatibility between Rancher and managed Kubernetes versions needs watching during upgrades
  • Support requires a SUSE subscription; the project itself is community-supported

Terragrunt

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

Pricing, plan by plan

Rancher

Free
  • RancherFree
    • Full functionality
    • No data limits
    • Community support

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

Which should you pick?

Choose Rancher if

  • You need multi-cluster management.
  • You want to start without paying.
  • You work on Kubernetes, Linux, Docker, Self-hosted.
  • You also want centralised rbac.
Rancher review

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

Questions people ask

Is Rancher or Terragrunt better?
Neither clearly leads. Rancher starts at Free and Terragrunt at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Rancher or Terragrunt?
Rancher starts at Free and Terragrunt at Free.
Does Rancher or Terragrunt run on more platforms?
Rancher runs on Kubernetes, Linux, Docker, Self-hosted. Terragrunt runs on AWS, Azure, GCP.
Can I use Rancher for free?
Both have a free tier, so you can try either at no cost before committing.
What is Rancher best used for?
Rancher is most often used for operating many kubernetes clusters with consistent access control, managing clusters across more than one cloud provider from one interface, edge deployments with many small clusters, typically alongside k3s. Of those, operating many kubernetes clusters with consistent access control and managing clusters across more than one cloud provider from one interface are not what Terragrunt is typically brought in for.
What can Rancher do that Terragrunt cannot?
Rancher covers Multi-cluster management, Centralised RBAC, Cluster provisioning, App catalogue. Terragrunt covers Infrastructure orchestration, Run Queue, DRY configuration, Automated hooks.

Answered from the vendors’ own pages

Rancher: Is Rancher free?

Yes, open source with no licence fee. SUSE sells support subscriptions.

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
Rancher: Does Rancher work with EKS and GKE?

Yes. It imports and manages existing clusters regardless of who provisioned them, alongside clusters it creates itself.

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
Rancher: Do I need Rancher for one cluster?

Generally no. Its value appears when cluster count and consistent access control become the problem, which is not the case with one.

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