Localstack
by localstack
LocalStack: AWS Cloud Emulator for Local Development
Run a complete AWS environment on your local machine for faster development, testing, and debugging without cloud costs or internet dependency.
- 64,103+ GitHub stars
- Built with Python
- Emulates 80+ AWS services locally with high-fidelity behavior
- Other license
About This Project
LocalStack transforms cloud development by providing a fully-featured AWS cloud emulator that runs entirely on your local machine. Instead of deploying to actual AWS services during development, you can spin up S3 buckets, Lambda functions, DynamoDB tables, and dozens of other AWS services locally, dramatically accelerating your development cycle and eliminating cloud costs during testing.
This powerful developer tool is essential for modern serverless and cloud-native development workflows. It enables you to write, test, and debug AWS applications offline with realistic service behavior, making it invaluable for CI/CD pipelines, integration testing, and rapid prototyping. You can experiment freely without worrying about accidentally provisioning expensive resources or exposing sensitive data to the cloud.
LocalStack supports an extensive range of AWS services including Lambda, S3, DynamoDB, API Gateway, SQS, SNS, CloudFormation, and many more. It integrates seamlessly with popular infrastructure-as-code tools like Terraform, AWS CDK, and Serverless Framework, allowing you to use your existing deployment configurations without modification.
The project has become the industry standard for local AWS development, trusted by thousands of developers and organizations worldwide. Whether you're building microservices, serverless applications, or complex cloud architectures, LocalStack provides the fast feedback loops and cost-effective testing environment that modern development demands.
Key Features
- Emulates 80+ AWS services locally with high-fidelity behavior
- Zero cloud costs during development and testing phases
- Works offline without internet connectivity or AWS credentials
- Compatible with AWS SDK, CLI, Terraform, CDK, and Serverless Framework
- Docker-based deployment for consistent cross-platform development
How You Can Use It
Testing serverless applications locally before deploying to production AWS
Running integration tests in CI/CD pipelines without AWS credentials or costs
Developing and debugging Lambda functions with instant feedback loops
Prototyping cloud architectures and validating infrastructure-as-code templates offline
Who Is This For?
Cloud developers, DevOps engineers, serverless architects, and teams building AWS-based applications who need fast, cost-effective local testing environments