localstack-alternative

Ministack: Free, open-source local AWS emulator - 60+ services, Terraform compatible, real databases. Free forever. MIT licensed.

Free, open-source AWS emulator. LocalStack alternative: 105 services, 7,404 operations, true 100% Smithy conformance (248,557/248,557 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.

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.

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

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.

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.

Mimir — your local AWS cloud. 54 AWS-compatible services and a full web console, running on your machine. Free.

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.

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.