cloud-emulator

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.

Run Terraform, OpenTofu and the official Scaleway, Outscale and Exoscale CLIs locally — no cloud account, no credentials, nothing billed.

Light, fluffy, and always free - Local Oracle Cloud Emulator

Azure AI Search Simulator provides a lightweight environment to emulate Azure AI Search in pull or push modes. It offers a compatible API surface and works seamlessly with the official SDK, enabling local development, testing, and debugging without requiring a live search service.

A full-stack web dashboard for browsing and managing AWS resources running on https://localstack.cloud. Provides an AWS Console-like experience for local development with support for S3, SQS, SNS, IAM, CloudFormation, Lambda, and DynamoDB. Built with Fastify, React, and AWS SDK v3. Available as a web app, docker, standalone

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.

Local GCP runtime for development and testing: unified Secret Manager, KMS, Eventarc, and IAM with full API compatibility. No credentials, no network, single process.

Independent open-source LOCAL reimplementation of core Google Cloud Platform primitives (object storage, document DB, pub/sub, event functions) for offline development and testing. Pure stdlib. Not affiliated with Google.

Local development companion for cloud-native apps. Iterate fast without cloud bills, then land cleanly on your CSP.

A modern web application for comparing cloud phone emulators with affiliate integration

Run Terraform and the official Scaleway, Outscale and Exoscale CLIs in GitHub Actions against a local emulator — no cloud account, no credentials, nothing billed.

openaws — an independent, open-source LOCAL reimplementation of core AWS-style primitives (S3, DynamoDB, SQS, Lambda) for offline development and testing. Not affiliated with AWS.

Independent open-source LOCAL reimplementation of core Firebase developer primitives (Firestore-style docs, realtime JSON tree, local auth, static hosting, function triggers) for local development & testing. Std-lib Python, not affiliated with the vendor.

kiri — a single-binary Google Cloud emulator. 108 GCP services on one local endpoint, real SDK / gcloud / Terraform compatible, with a cost surface.

openazure - an independent, open-source LOCAL reimplementation of core Azure primitives (Blob, Table, Queue, Functions) for local development and testing. Not affiliated with Microsoft.

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.