Pulumi vs AWS CDK: Head-to-Head Comparison

Quick Verdict

Pulumi is the better pick for developers who prefer TypeScript, Python or Go over HCL. AWS CDK is the better pick for AWS developers who want infrastructure in code.

---

At a Glance

Feature	Pulumi	AWS CDK
Best For	Developers who prefer TypeScript, Python or Go over HCL	AWS developers who want infrastructure in code
Pricing	Free open-source CLI; paid Pulumi Cloud	Free and open source
Free to Start	Yes	Yes
License	Open source	Open source
Deployment	CLI with optional Pulumi Cloud	Library / framework in your stack
Link	Visit Pulumi	Visit AWS CDK

---

Detailed Breakdown

Pulumi

Infrastructure as code in general-purpose languages

Pros:

• Use real programming languages
• Strong testing and abstraction
• Can use Terraform providers via bridges

Cons:

• More freedom can mean less consistency
• Smaller community than Terraform

---

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

---

Key Differences

• Positioning: Pulumi — infrastructure as code in general-purpose languages. 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: Pulumi — CLI with optional Pulumi Cloud. AWS CDK — library / framework in your stack.
• Pricing: Pulumi — free open-source CLI; paid Pulumi Cloud. AWS CDK — free and open source.
• Signature strength: Pulumi — use real programming languages. AWS CDK — high-level constructs.

---

Frequently Asked Questions

Is Pulumi better than AWS CDK?

It depends on your requirements. Pulumi is a strong fit for developers who prefer TypeScript, Python or Go over HCL, while AWS CDK suits AWS developers who want infrastructure in code.

Is Pulumi free to use?

Yes, you can start with Pulumi for free. Pricing model: Free open-source CLI; paid Pulumi Cloud.

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 Pulumi or AWS CDK?

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

What are the main drawbacks of Pulumi and AWS CDK?

Pulumi: more freedom can mean less consistency; smaller community than Terraform. AWS CDK: AWS focused; inherits CloudFormation limits.