Pulumi describes Pulumi HCL as an OpenTofu-compatible HCL runtime and has published how it tests that claim. For devops teams, the key is to understand the evidence boundary rather than infer full equivalence from the compatibility label.

Pulumi’s native Terraform module support offers a way to evaluate reusable IaC assets before making a broad tooling decision. Modules are also where teams should validate inputs, outputs, providers, dependencies, and plan behavior.