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APIs · head to head

Swagger/OpenAPI vs Terragrunt

Swagger/OpenAPI logo

Swagger/OpenAPI

APIs

API specification and documentation framework using OpenAPI standard

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: Swagger/OpenAPI the OpenAPI Specification itself is licensed under Apache License 2.0 and free to use; SwaggerHub is a separate paid tool built on top of it; Terragrunt additional complexity layer on top of Terraform
  • They diverge on capability: Swagger/OpenAPI covers OpenAPI Specification, Terragrunt covers Infrastructure orchestration.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Swagger/OpenAPI and Terragrunt actually diverge.

Attributes where Swagger/OpenAPI and Terragrunt differ
AttributeSwagger/OpenAPITerragrunt
Pricing modelfreemiumUnknown
PlatformsWeb, CLI, DesktopAWS, Azure, GCP
CategoryAPIsCloud
Founded2001Unknown

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 Swagger/OpenAPI

  • OpenAPI Specification
  • Interactive Documentation
  • Code Generation
  • GitHub
  • GitLab
  • Jenkins
  • IDE plugins
  • Web support

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.

Swagger/OpenAPI

  • API Developmentnot Terragrunt
  • API Gatewaynot Terragrunt
  • API Testingnot Terragrunt
  • API Documentationnot Terragrunt
  • Microservicesnot Terragrunt

Terragrunt

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

Where each one falls short

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

Swagger/OpenAPI

  • The OpenAPI Specification itself is licensed under Apache License 2.0 and free to use; SwaggerHub is a separate paid tool built on top of it

Terragrunt

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

Pricing, plan by plan

Swagger/OpenAPI

Free
  • Open SourceFree
    • OpenAPI specification
    • Community tools
  • SwaggerHub FreeFree
    • Cloud editor
    • API mocking
    • API testing
  • SwaggerHub Pro$75/monthly
    • Team collaboration
    • Advanced mocking
    • Analytics

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 Swagger/OpenAPI if

  • You need openapi specification.
  • You want to start without paying.
  • You work on Web, CLI, Desktop.
  • You also want interactive documentation.
Swagger/OpenAPI 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 Swagger/OpenAPI or Terragrunt better?
Neither clearly leads. Swagger/OpenAPI 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, Swagger/OpenAPI or Terragrunt?
Swagger/OpenAPI starts at Free and Terragrunt at Free.
Does Swagger/OpenAPI or Terragrunt run on more platforms?
Swagger/OpenAPI runs on Web, CLI, Desktop. Terragrunt runs on AWS, Azure, GCP.
Can I use Swagger/OpenAPI for free?
Both have a free tier, so you can try either at no cost before committing.
What is Swagger/OpenAPI best used for?
Swagger/OpenAPI is most often used for api development, api gateway, api testing, api documentation. Of those, api development and api gateway are not what Terragrunt is typically brought in for.
What can Swagger/OpenAPI do that Terragrunt cannot?
Swagger/OpenAPI covers OpenAPI Specification, Interactive Documentation, Code Generation, GitHub. Terragrunt covers Infrastructure orchestration, Run Queue, DRY configuration, Automated hooks.

Answered from the vendors’ own pages

Swagger/OpenAPI: Is Swagger UI free to use?

Swagger UI is an open source tool with source code publicly available on GitHub at no cost. It is one of thousands of free open source projects in the Swagger ecosystem.

Source
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
Swagger/OpenAPI: What commercial Swagger products are available beyond the open source tools?

Swagger offers Swagger for Teams for streamlined API workflow with interactive editors and hosted documentation, and Swagger Enterprise for organizations needing secure on-premise or cloud-based environments. Specific pricing requires contacting sales.

Source
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
Swagger/OpenAPI: Are there commercial versions that build on the open source Swagger tools?

Yes, commercial Swagger products integrate the core functionality of Swagger open source tools (Editor, UI, and Codegen) with advanced capabilities for team collaboration, standards enforcement, and enterprise features.

Source
Swagger/OpenAPI: Is there a trial available for Swagger commercial products?

A Start Trial call-to-action is available on the Swagger website, but specific trial duration and terms are not disclosed on the product pages.

Source
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