Terragrunt

What Terragrunt is

Terragrunt is an open-source infrastructure-as-code orchestration tool for running Terraform and OpenTofu at scale. It organizes infrastructure into separately operable units and groups related units into stacks. Its Run Queue uses dependency relationships to order operations and allows concurrency where it is safe. Teams can define shared backend settings, provider configuration, module inputs, and environment conventions once for inheritance across units. The tool supports AWS, Google Cloud, Microsoft Azure, and other platforms supported by Terraform or OpenTofu; state management is self-hosted, and existing resources can be imported. Terragrunt is documented for Windows, macOS, and Linux. The Free plan costs nothing and allows up to 25 infrastructure units, unlimited runs, and community support, with no credit card required. Team costs $500 a month, billed with a stated 17% annual contract discount, and includes 200 units and standard support. Terragrunt Scale adds CI/CD pipelines, drift detection, and automated dependency updates, with GitHub and GitLab workflow support. Its operations run in customers’ CI runners and repositories and use OIDC for temporary least-privilege credentials. The maker says Scale has no compliance certifications of its own and inherits security from GitHub or GitLab.

Who it suits

Terragrunt suits infrastructure teams using Terraform or OpenTofu who want shared configuration and dependency-aware operations. Its Free tier is described for individuals, startups, or teams trying Scale; Team is described for growing platform teams in production.

Limits

The Free plan covers up to 25 infrastructure units and excludes RUM; it includes unlimited runs and unlimited resources. Team costs $500 a month and covers 200 infrastructure units. Enterprise offers unlimited units, with custom pricing.

Getting started

1. Visit terragrunt.com.
2. Choose the Free plan or review the Team and Enterprise plans.
3. Install Terragrunt on Windows, macOS, or Linux using its installation guide.
4. Use the guide’s checksum, GPG signature, and release attestation verification for downloads.
5. Connect Terragrunt with Terraform or OpenTofu and organize infrastructure into units and stacks.

Verdict

Terragrunt combines unit and stack organization with dependency-aware operations for Terraform and OpenTofu. Scale adds team workflow features, while its own compliance certifications are absent and Team has a listed monthly price.