Ministack: Free, open-source local AWS emulator - 60+ services, Terraform compatible, real databases. Free forever. MIT licensed.
Free, open-source AWS emulator. LocalStack alternative: 107 services, 7,657 operations, true 100% Smithy conformance (258,545/258,545 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.
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.
Your own AWS, on your hardware. One binary runs 30 AWS-style services on Docker; the AWS CLI, SDKs and Terraform work unchanged.
A verification layer for AI coding agents. 250+ real-protocol service emulators (Stripe, Postgres, Slack, S3, OpenAI…) on local Docker.
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.
A fast, free, open-source local cloud service emulator — develop and test against AWS APIs without an internet connection, a cloud account, or a bill.
A visual web console to manage you Floci local AWS emulator ---- built with React and .NET 8,
Fast local AWS sandbox using Fakecloud, Terraform, REST API Gateway, Lambda, and first-party Python test SDK
Stop Paying for LocalStack: A high-performance, MIT-licensed local AWS emulator (S3, DynamoDB, SQS) integrated with Spring Boot 4. By Shivam Srivastav.
The in-process AWS mock library for the JVM. Every AWS service. In-memory. Milliseconds per test. No Docker.
⚡ Ultra-fast local AWS emulator in Rust: 1.6MB memory footprint, sub-millisecond latency & 20x lighter than MiniStack / LocalStack
A local AWS emulator for testing event-driven systems on your machine and in CI: one Go binary standing in for 12 AWS services, including SQS, SNS, S3, Lambda and DynamoDB.
Event-sourced AWS emulator for deterministic testing of AI-generated infrastructure code
kiri — a single-binary Google Cloud emulator. 108 GCP services on one local endpoint, real SDK / gcloud / Terraform compatible, with a cost surface.
kiri-aws — a single-binary AWS emulator with a billing time machine. Local AWS services + Cost Explorer, drop-in for the AWS SDKs, CLI, and Terraform.
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.