Ministack: Free, open-source local AWS emulator - 55+ services, Terraform compatible, real databases. Free forever. MIT licensed.

Free, open-source AWS emulator. LocalStack alternative: 41 services, 3,704 operations, true 100% Smithy conformance (124,255/124,255 variants pass). No account, no auth token, no paid tier.

LocalEmu: a free, open-source AWS emulator. Run 132 AWS services locally with one pip install. No account, no token, no telemetry. The drop-in LocalStack alternative for the AWS CLI, boto3, Terraform and CDK.

A verification layer for AI coding agents. 250+ real-protocol service emulators (Stripe, Postgres, Slack, S3, OpenAI…) on local Docker.

Local AWS cloud in one Docker image. Run S3, Lambda, Glue, EC2, DynamoDB and more locally.

Vyomi — the Multi-Cloud Digital Twin Runtime. A faithful, running replica of AWS, GCP & Azure on your machine (real backends, standard SDKs). Build for the cloud, without the cloud. Often used as a local multi-cloud simulator / LocalStack alternative.

MildStack: Go-based lightweight AWS emulator. Run AWS services locally, without Docker. Includes a powerful Desktop App for resource browser and services managing.

Single-binary local emulator for Google Cloud Platform services. Pure Go, no Docker, no Java.

Stop Paying for LocalStack: A high-performance, MIT-licensed local AWS emulator (S3, DynamoDB, SQS) integrated with Spring Boot 4. By Shivam Srivastav.

A visual web console to manage you Floci local AWS emulator ---- built with React and .NET 8,

Event-sourced AWS emulator for deterministic testing of AI-generated infrastructure code

Runnable demo scripts for Floci — 65 AWS services locally in a single Docker container. No cloud account, no auth tokens, no paid tiers. M3 MacBook ready.