Comparisons Practical By Samson Tanimawo, PhD Published Jun 29, 2025 4 min read

Terraform vs CloudFormation

IaC.

Terraform strengths

Multi-cloud. Same tool, same syntax across AWS, GCP, Azure, Cloudflare. Vendor-neutral.

Mature module ecosystem. Public registry; thousands of community modules.

Strong third-party tooling: terragrunt, atlantis, terratest, Terraform Cloud.

Native AWS. First to support new AWS services and features. Tightly integrated with AWS Console and IAM.

Drift detection built-in. CFN tracks resource state; surfaces external modifications.

Stack management primitives: stack sets, nested stacks, change sets. Native concepts.

CloudFormation YAML/JSON is verbose. HCL is more compact.

Terraform state management requires care. CloudFormation manages state in the service; less to break.

CloudFormation locked to AWS. Multi-cloud orgs end up with separate tools per cloud.

AWS-only stack: either works. CloudFormation slightly faster to support new services; Terraform has better tooling.

Multi-cloud or future-multi-cloud: Terraform or Pulumi. Avoid AWS-locked IaC.

Existing infrastructure: stay with what you have. Migration cost rarely pays.