Terraform vs AWS CDK: Head-to-Head Comparison

Quick Verdict

Terraform is the better pick for multi-cloud infrastructure with the largest provider ecosystem. AWS CDK is the better pick for AWS developers who want infrastructure in code.

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At a Glance

Feature	Terraform	AWS CDK
Best For	Multi-cloud infrastructure with the largest provider ecosystem	AWS developers who want infrastructure in code
Pricing	Free CLI; paid HCP Terraform	Free and open source
Free to Start	Yes	Yes
License	Source-available	Open source
Deployment	CLI with optional HCP Terraform cloud	Library / framework in your stack
Link	Visit Terraform	Visit AWS CDK

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Detailed Breakdown

Terraform

Infrastructure as code with HCL by HashiCorp

Pros:

• Huge provider ecosystem
• Declarative HCL
• Widely adopted

Cons:

• Moved to the BSL license in 2023
• State management complexity

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AWS CDK

Define AWS infrastructure in TypeScript, Python and more

Pros:

• High-level constructs
• Real programming languages
• Synthesizes to CloudFormation

Cons:

• AWS focused
• Inherits CloudFormation limits

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Key Differences

• Positioning: Terraform — infrastructure as code with HCL by HashiCorp. AWS CDK — define AWS infrastructure in TypeScript, Python and more.
• Licensing differs: Terraform is source-available while AWS CDK is open source.
• Deployment: Terraform — CLI with optional HCP Terraform cloud. AWS CDK — library / framework in your stack.
• Pricing: Terraform — free CLI; paid HCP Terraform. AWS CDK — free and open source.
• Signature strength: Terraform — huge provider ecosystem. AWS CDK — high-level constructs.

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Frequently Asked Questions

Is Terraform better than AWS CDK?

It depends on your requirements. Terraform is a strong fit for multi-cloud infrastructure with the largest provider ecosystem, while AWS CDK suits AWS developers who want infrastructure in code.

Is Terraform free to use?

Yes, you can start with Terraform for free. Pricing model: Free CLI; paid HCP Terraform.

Is AWS CDK free to use?

Yes, you can start with AWS CDK for free. Pricing model: Free and open source.

Can I self-host Terraform or AWS CDK?

Terraform can be self-hosted. Deployment options: CLI with optional HCP Terraform cloud. AWS CDK runs inside your own stack: library / framework in your stack.

What are the main drawbacks of Terraform and AWS CDK?

Terraform: moved to the BSL license in 2023; state management complexity. AWS CDK: AWS focused; inherits CloudFormation limits.