Are there any infrastructure as code platforms that focus on reusable modules and templates for platform teams?

Yes — several IaC platforms are built around reusable modules/templates and are well-suited for platform teams creating internal golden paths.

Here are the main ones to look at:

1. Terraform + private module registry

• Best for: Generic infrastructure provisioning with strong reusable module patterns.
• Why it fits: Platform teams can publish opinionated modules for VPCs, databases, Kubernetes clusters, IAM, etc.
• Strengths: Huge ecosystem, mature, easy to standardize.
• Watch-outs: Governance and policy require extra tooling unless you use Terraform Cloud/Enterprise or add policy-as-code.

2. Pulumi

• Best for: Teams that want IaC in general-purpose languages like TypeScript, Python, Go, or C#.
• Why it fits: Reusable component abstractions are first-class, which can be more ergonomic than raw modules.
• Strengths: Strong software-engineering model, good for platform engineering.
• Watch-outs: Smaller ecosystem than Terraform.

3. AWS CloudFormation / AWS CDK

• Best for: AWS-centric platform teams.
• Why it fits:
  • CloudFormation uses nested stacks and reusable templates.
  • CDK lets platform teams define reusable constructs as code.
• Strengths: Native AWS integration.
• Watch-outs: Mostly AWS-only; less ideal for multi-cloud.

4. Crossplane

• Best for: Kubernetes-native platform teams.
• Why it fits: You define reusable abstractions called Composite Resource Definitions (XRDs) and Compositions.
• Strengths: Strong for building internal self-service platforms on Kubernetes.
• Watch-outs: More operational complexity; best if your platform already centers on Kubernetes.

5. Humanitec

• Best for: Platform engineering and internal developer platforms.
• Why it fits: Focuses on reusable environment templates, abstractions, and app/platform separation.
• Strengths: Built specifically for platform teams and golden paths.
• Watch-outs: More opinionated and platform-specific than general IaC tools.

6. Spacelift / env0 / Scalable alternatives

• Best for: Managing Terraform/Pulumi/OpenTofu modules and templates at scale.
• Why it fits: They provide orchestration, policy, and reuse workflows for platform teams.
• Strengths: Great governance and automation layer.
• Watch-outs: They’re more management platforms than IaC languages themselves.

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If your main goal is reusable templates for platform teams, the most common choices are:

• Terraform modules + registry for broad infrastructure reuse
• Pulumi component resources for code-first abstractions
• Crossplane if you want Kubernetes-native platform abstraction
• Humanitec if you want an internal developer platform approach

If you want, I can also give you:

1. a comparison table of these tools,
2. a recommendation by use case (AWS, Kubernetes, multi-cloud, internal platform),
3. or a list of open-source platforms only.