OpenTofu vs AWS CDK: Head-to-Head Comparison

Quick Verdict

OpenTofu is the better pick for teams wanting Terraform compatibility with an open-source license. AWS CDK is the better pick for AWS developers who want infrastructure in code.

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At a Glance

Feature	OpenTofu	AWS CDK
Best For	Teams wanting Terraform compatibility with an open-source license	AWS developers who want infrastructure in code
Pricing	Free and open source	Free and open source
Free to Start	Yes	Yes
License	Open source	Open source
Deployment	CLI	Library / framework in your stack
Link	Visit OpenTofu	Visit AWS CDK

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Detailed Breakdown

OpenTofu

Open-source Terraform fork under the Linux Foundation

Pros:

• Drop-in Terraform compatibility
• MPL-licensed and community governed
• Adds features like state encryption

Cons:

• Gradual divergence from Terraform
• Smaller vendor support

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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: OpenTofu — open-source Terraform fork under the Linux Foundation. AWS CDK — define AWS infrastructure in TypeScript, Python and more.
• Both share the same licensing model (open source), so the decision comes down to features and workflow fit.
• Deployment: OpenTofu — CLI. AWS CDK — library / framework in your stack.
• Pricing: OpenTofu — free and open source. AWS CDK — free and open source.
• Signature strength: OpenTofu — drop-in Terraform compatibility. AWS CDK — high-level constructs.

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Frequently Asked Questions

Is OpenTofu better than AWS CDK?

It depends on your requirements. OpenTofu is a strong fit for teams wanting Terraform compatibility with an open-source license, while AWS CDK suits AWS developers who want infrastructure in code.

Is OpenTofu free to use?

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

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 OpenTofu or AWS CDK?

OpenTofu can be self-hosted. Deployment options: CLI. AWS CDK runs inside your own stack: library / framework in your stack.

What are the main drawbacks of OpenTofu and AWS CDK?

OpenTofu: gradual divergence from Terraform; smaller vendor support. AWS CDK: AWS focused; inherits CloudFormation limits.