# LocalStack

💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline

Repository: https://github.com/localstack/localstack
Canonical: https://ross.abutalabs.com/products/localstack
Homepage: https://localstack.cloud
Language: Python
License: NOASSERTION
License Family: other
Topics: aws, localstack, testing, continuous-integration, developer-tools, python, cloud
Archived: true
Last push: 2026-03-23T08:52:01+00:00

## Health v2 (maintenance only)
Score: 10/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 73, release rhythm 72, longevity 100
- inputs: {"age_days": 3599, "days_push": 163, "days_rel": 188, "gap_med": 22, "n_releases_24m": 28}
- flags: archived, no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 65145, forks 4790 (observed 2026-08-28T04:12:19.249781+00:00)

## What it is
LocalStack is a fully functional local AWS cloud emulator that lets developers develop and test cloud and serverless applications offline. It emulates AWS services (S3, Lambda, DynamoDB, SQS, and many more) via a local API-compatible endpoint, typically run in Docker.

## Use cases
- test AWS applications locally without a real AWS account
- run integration tests against emulated AWS services in CI
- develop serverless apps offline
- mock S3, DynamoDB, SQS, and Lambda locally
- avoid AWS costs during development and testing
- reproduce cloud bugs locally before deploying

## When to choose
- you build or test applications that depend on AWS services
- you want fast, free, offline AWS API emulation in CI pipelines
- you need deterministic, isolated cloud environments for testing

## When to avoid
- you need exact parity with real AWS behavior and edge cases
- you require services or features not covered by the emulator
- you only want to inspect or manage real AWS resources

## Facets
- artifact type: service
- maturity: active
- function: testing, cloud, developer-tools, mock-api, serverless
- domain: cloud-computing, developer-tools, testing
- platform: python, cli, cross-platform
- tags: aws-emulation, local-cloud, mock-aws, offline-development, ci-cd, serverless-testing, devops, aws, docker

## Member repositories
- localstack/localstack (main) score 10
- localstack/awscli-local (plugin) score 62

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:12:19.249781+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T16:17:24.837505+00:00, confidence not recorded.
  - readme: https://github.com/localstack/localstack (fetched 2026-08-28T04:12:19.249781+00:00, sha f36aafaf2394)
- Data as of 2026-08-30T08:39:29.467469+00:00.