Fakecloud emulates 105 AWS services locally with true 100% Smithy conformance
Fakecloud: Local AWS cloud emulator for integration tests
Fakecloud is a local AWS emulator that runs your app with normal AWS clients while staying fully offline. It covers 105 services and 7,508 operations, passing all 248,557 Smithy test variants. Unlike LocalStack Community, it requires no account, auth token, or paid plan. First-party SDKs for TypeScript, Python, Go, PHP, Java, and Rust add test assertions, async control, and introspection.
fakecloud gives you a local AWS environment that behaves like infrastructure, not a mock.
- otterley
There’s also MiniStack, which forked from LocalStack after they started breaking developer workflows: https://ministack.org/
Both fakecloud and its website look sloppily vibe-coded, and its “authors” are anonymous. It’s going to take a while for it to earn trust. I’d treat it with suspicion. (Curl-to-shell pipe to install? Ugh.)
- shermantanktop
There are so many of these, but none of them simulate the surprise-billing experience.
- arpinum
"46 at true 100% conformance". This is factually incorrect. Inspected their DynamoDB service and it comes nowhere close to implementing the full api.
- michaelastreiko
Local stubs like this are a lifesaver for one-person webhook testing without burning cloud credits every morning.
- bilekas
There are always nice, but there are a lot of scaffolding work involved with larger systems. It would be nice to be able to provide for example the terraform of the infrastructure and let these tool create their own. Might be a nice feature to add because I haven't seen it done yet.