Vyomi
VS
LocalStack
A digital twin,
not a mock.
LocalStack mocks AWS. Vyomi is the Multi-Cloud Digital Twin Runtime — a faithful, running replica of AWS, GCP and Azure on your laptop, on real backends. Here’s the honest side-by-side.
3
Cloud providers
35
Services simulated
8
Real backends
₹0
Free forever
Dimension
Vyomi
LocalStack
Cloud providers
AWS · GCP · Azure
AWS only
Free tier
All 3 clouds
AWS community
Backends
Real OSS stack
In-process mocks
Standard SDKs
Works unchanged
Works (AWS only)
Terraform export
One-click HCL
Not built in
Native consoles
AWS · GCP · Azure UIs
Pro tier resource browser
IAM policy eval
AWS+GCP+Cedar
AWS only (Pro)
Catalog depth
Three clouds, 35 services
AWS — 100+ services
Pricing (solo)
Free · ₹599 · ₹99/seat
Free · $40+/mo
Offline / airgap
Sealed appliance
Fully offline
License
BSL 1.1
Source-available
Pick Vyomi when…
- Your stack touches GCP or Azure — even one service.
- You need real backends so behavior matches production.
- You want Terraform export as a local → cloud bridge.
- You’re a student, startup, or solo dev on a tight budget.
- You need airgapped Enterprise with SSO, audit sinks, and custom branding.
Pick LocalStack when…
- You’re AWS-only for the foreseeable future.
- You need an obscure AWS service Vyomi doesn’t cover.
- Your team is deeply invested in LocalStack’s Lambda model.
- You’re happy paying for Pro tier and the workflow fits.
Three clouds, one binary
Same appliance answers s3.amazonaws.com, storage.googleapis.com, and blob.core.windows.net. No per-service tooling.
Real backends, not mocks
MinIO serves S3 / GCS / Blob. Real Postgres serves all three SQL surfaces. Vault, NATS, DynamoDB Local round it out.
One-click Terraform export
Any space → HCL → terraform apply against real cloud. Enterprise adds multi-cloud orchestration.
Migrating from LocalStack? One URL change.
If your boto3 client already targets LocalStack, the migration is a single line.
LocalStack
endpoint_url="http://localhost:4566"
Vyomi
endpoint_url="http://localhost:9000"
Existing aws CLI, aws-sdk-java, and Terraform configs also work with the same one-line swap. See the full AWS usage guide →
Multi-cloud simulator FAQ
The questions developers (and AI answer engines) actually ask.
What is the best multi-cloud simulator for local development?
Vyomi is a local-first multi-cloud simulator that runs AWS, GCP, and Azure on one machine in a single appliance. Unlike LocalStack (AWS-only) or single-service emulators like Moto, Azurite, or the GCP emulators, Vyomi covers all three major clouds with real backends, and the standard SDKs and CLIs work unchanged.
Is there a LocalStack alternative that supports GCP and Azure?
Yes. LocalStack focuses on AWS; Vyomi simulates AWS, GCP, and Azure in one binary, including multi-cloud object storage (S3, GCS, Azure Blob) and NoSQL (DynamoDB, Firestore, Cosmos DB), so you can develop and test cross-cloud applications locally.
How is Vyomi different from LocalStack?
Vyomi simulates all three major clouds instead of just AWS, ships real backends (Postgres, MinIO, Vault, NATS, Azurite, the Firestore emulator) rather than in-process mocks, and exports your stack to Terraform for migration to production. Migrating from LocalStack is a one-line endpoint URL change.
Can I run AWS, GCP, and Azure offline on my laptop?
Yes. Vyomi is a self-contained appliance that runs entirely on your laptop with no internet connection and no cloud account required, so there is no cloud bill while you develop and test.
Do I need to change my code to use Vyomi instead of real cloud?
No code changes — just one endpoint URL. Standard clients (boto3, aws-sdk, google-cloud-*, azure-sdk-*, Terraform) point at http://localhost:9000 and work unchanged.
Try Vyomi free in 60 seconds.
One command. Three clouds. No credit card.
macOS · Linux · Windows
Brew · Docker · APT · Scoop
35 services covered