By use case

Local Cloud DevelopmentBuild real cloud apps on localhost — unmodified SDKs, CLIs & Terraform. Cross-Cloud PortabilityRun the same workload across AWS, GCP and Azure, side by side. Offline & Air-GappedA complete cloud with no account, no bill, no network. In-Browser Cloud (Nano)The entire simulator in a browser tab — zero install.

By workflow

Cloud CI TestingEphemeral cloud twins for real integration tests in CI. IAM & Policy TestingValidate IAM / Cedar authorization against a real evaluator. Infrastructure-as-CodeDevelop Terraform against the twin, then export to prod.

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The platform Multi-Cloud Digital Twin A faithful, running replica of AWS, GCP & Azure on your machine — real services on real backends.

Explore the platform →

Who we serve

DevelopersBuild for the cloud, without the cloud — on localhost. EnterprisesA faithful, air-gapped cloud for every engineer — with SSO & seats.

UniversitiesA real cloud lab in every browser tab — no accounts, no bills. TrainersRun cloud workshops with zero attendee setup.

Zero install Try it in your browser A real conformance backend runs in the tab — spin up a cloud lab in seconds, nothing to install. Free with a Vyomi account. Launch Nano →

VYOMI Local Cloud Simulator

The cloud was built to run software.
Not to build it.

So stop developing against it.

Vyomi is a faithful AWS, GCP & Azure twin that runs in your browser sandbox. Same SDKs, CLIs and Terraform, real backends, zero cloud bill. Build, test and validate cloud code without touching the cloud.

▶ Launch Simulator

console.vyomi.cloud/awsLive

console.vyomi.cloud/gcpLive

console.vyomi.cloud/azureLive

PRINCIPLES

How it stays faithful.

We simulate API contracts + lifecycle with the cheapest convincing tech — never reproducing cloud internals. The principle is fidelity-at-the-edge.

Real backends

S3 / GCS / Blob run on MinIO + fake-gcs. RDS and Cloud SQL run on real Postgres + MySQL. Secrets go to Vault. Functions execute real Python and Node. Nothing is mocked at the edge — your SDK talks to the genuine thing.

S3 · GCS · Blob→MinIO · fake-gcs

RDS · Cloud SQL→Postgres · MySQL

Secrets Manager→Vault

Lambda · Functions→Python · Node exec

8 backends · all opt-in via compose profiles.

Cedar IAM

AWS IAM and Cedar policies enforced at the API surface. Deny-by-default, principal/resource scoping, condition keys.

Developer + Enterprise tiers.

Terraform hand-off

Export any space's state to HCL with one click. Single-cloud deploy on Developer; multi-cloud orchestration on Enterprise.

Round-trip tested with terraform plan + apply.

CloudSim power

Heterogeneous VM shapes feed CloudSim Plus for energy + cost simulation. Real LXD limits per instance type.

Per-space totals + per-resource on Developer+.

Native consoles

Real AWS / GCP / Azure web consoles re-implemented locally. EC2-style wizards, ARM-style multi-step.

11 + 9 + 9 services with full create-wizards.

Tenant isolation

Multi-tenant by default. Per-tenant quota + license, structural cross-tenant block, isolated buckets.

1:N tenant:space, 1:1 space:provider.

What's inside

3 cloud providers · 55 services · Cedar IAM · Terraform export · CloudSim power model · 8 real backends.

Explore features →

Plans & pricing

Free forever for individuals. Paid plans from $9/mo · Enterprise from $12/developer.

See pricing →

API Reference

Interactive Swagger consoles + SDK/CLI usage, one per cloud. Self-hosted, no appliance required.

Traction

Developers are already building on the twin.

Not a demo — a multi-cloud simulator that ships every week, gets pulled at scale, and runs on real machines and in the browser.

Releases shipped

Simulators active

Total downloads

GitHub downloads total, rendered independently by shields.io

Deduped per install · internal/dev excluded · country from CF-IPCountry, no IP stored. How we count ↗

Services

Every cloud service, running locally.

S3, Lambda, DynamoDB, Pub/Sub, Cosmos DB, Key Vault and 55+ more — the native console experience across AWS, GCP and Azure.

Explore all services →

Verified by real conformance harness

Real SDKs · works unchanged

Your existing boto3 / aws-sdk-java / google-cloud-* / azure-sdk-* code runs against vyomi with one URL change — no mocks, no shims.

AWS 4 SDKs

boto3 aws-sdk-java aws-sdk-go aws CLI v2

GCP 4 SDKs

google-cloud-python google-cloud-java google-cloud-go gcloud + gsutil

Azure 4 SDKs

azure-sdk-python azure-sdk-java azure-sdk-go az CLI

Tooling 2 IaC

terraform OpenAPI specs JUnit harness Playwright tests