fakecloud vs MiniStack

How fakecloud compares to MiniStack. Both free, open-source AWS emulators that surfaced after LocalStack's March 2026 proprietary transition.

MiniStack is one of the free, open-source AWS emulators that gained momentum after LocalStack replaced its Community Edition with a proprietary image in March 2026. fakecloud is another.

This page is honest positioning. I maintain fakecloud, so the bias is declared. What follows is architectural — what each project is — rather than fabricated side-by-side benchmarks (the surest way to get out of date in days).

Both solve the same general problem

Free, open-source, local AWS emulation. Real HTTP server speaking the AWS wire protocol on port 4566. Any AWS SDK in any language works. Both are drop-in replacements for LocalStack Community for the services each covers.

The positioning difference

MiniStack's approach (check their repo for current details — it's moving fast): positions as a free LocalStack replacement. Evaluate their service coverage and architecture directly against your test suite.

fakecloud's approach: depth-first, explicit goal. 100% of AWS services, each at 100% behavioral conformance, with 100% of cross-service integrations. Services land one at a time; a service is added when it passes the full Smithy-model test variants and cross-service wire-ups, not when the API surface looks filled in. 23 services shipped today; more progressively. Built around real Lambda execution, real stateful backends (Postgres/MySQL/MariaDB/Redis/Valkey via Docker), and real cross-service wiring, validated on every commit against AWS's own Smithy models (59,000+ generated test variants) plus the upstream hashicorp/terraform-provider-aws TestAcc* suites.

These are philosophies, not rankings. Breadth-first and depth-first are different tradeoffs. A team whose tests lean lightly on many services will prefer breadth. A team whose tests exercise real cross-service flows or need real code execution will prefer depth.

How to pick

1. Open your test suite. Count the AWS services it actually calls.
2. Check each tool's current supported-services list against that set.
3. For the services you use, check depth: does the tool actually execute Lambda code? Actually run Postgres? Actually fire S3 -> Lambda notifications end-to-end?
4. Run your actual tests against each option you're considering. That's the only benchmark that matters for your codebase.

fakecloud specifics

Install fakecloud

curl -fsSL https://raw.githubusercontent.com/faiscadev/fakecloud/main/install.sh | bash
fakecloud

• Repo: github.com/faiscadev/fakecloud
• LocalStack alternative landing: /localstack-alternative/
• Four-way comparison: /blog/localstack-alternatives-compared/