cloudburn.io
AppInstant AWS cost analysis for CDK and Terraform in Pull Requests. Catch expensive changes before they reach production
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Stop AWS bill surprises before they happen. CloudBurn automatically analyzes Terraform and AWS CDK changes, providing detailed cost estimates directly in Pull Requests before you merge to production.
Catch expensive infrastructure decisions during code review when changes take seconds—not weeks later in production when optimization requires downtime and cross-team coordination. Every $100/month decision becomes $1,200/year in perpetual costs.
Key Features
- Automated cost analysis with real-time AWS pricing based on your infrastructure's region
- Intelligent filtering of zero-cost resources (VPC, IAM, security groups) - up to 88.9% noise reduction
- Smart comment updates - refreshes existing comments instead of creating duplicates
- Detailed cost breakdowns showing old vs. new monthly costs with delta calculations
Why Use It
- Prevent Bill Surprises: Catch expensive decisions during code review, not weeks later in production
- Shift-Left FinOps: Review infrastructure costs in seconds during PR review when changes are easy to make
- Developer Empowerment: Engineers get cost information to make informed tradeoffs without gatekeeping
- Build Cost Awareness: Team learns AWS pricing through daily exposure
Getting Started
Prerequisites: Install the companion GitHub Action first:
- For AWS CDK users: AWS CDK Diff PR Commenter
- For Terraform users: Terraform Plan PR Commenter
Setup (3 steps):
- Add the GitHub Action to your workflow (posts infrastructure diffs/plans as PR comments)
- Install CloudBurn from the GitHub Marketplace
- Open a PR with infrastructure changes - CloudBurn automatically adds cost analysis within seconds
Resources:

CloudBurn cost report comment showing infrastructure cost impact in a pull request
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Free forever for 1 repository. Perfect for individual developers and open-source projects.
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