Terraform vs CloudFormation: Which IaC Tool in 2026
| Feature | Terraform | CloudFormation |
|---|---|---|
| Cloud support | Multi-cloud | AWS only |
| Language | HCL | JSON/YAML |
| State management | Remote backends | Managed by AWS |
| Modularity | Modules, registry | Nested stacks |
| Drift detection | terraform plan | Drift detection |
| Cost | Free (OSS) + paid cloud | Free with AWS |
| Learning curve | Moderate | Moderate |
When to Use Terraform
- Multi-cloud or hybrid environments
- You want provider independence
- Team already knows HCL
- You need to manage non-AWS resources alongside AWS
When to Use CloudFormation
- 100% AWS shop with no plans to change
- You want AWS-managed state without backends
- You need deep AWS service integration on launch day
- Compliance requires AWS-native tooling
The OpenTofu Factor
Since HashiCorp relicensed Terraform (BSL), OpenTofu provides a truly open-source alternative with full Terraform compatibility. Many organizations are evaluating the switch.
My Recommendation
For AWS-only teams, CloudFormation works. For everyone else — and for future flexibility — Terraform (or OpenTofu) is the safer bet. The multi-cloud optionality alone justifies the choice.
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