this post was submitted on 27 Jun 2026
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Programming

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LocalEmu, a free, open-source AWS emulator: run 132 AWS services locally with one pip install (localemu.cloud)
submitted 1 day ago by nullroute@programming.dev to c/programming@programming.dev
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I maintain LocalEmu, a free and open-source (Apache 2.0) AWS emulator. It started as a fork of the archived LocalStack Community edition. The goal is to keep a genuinely free, open local AWS emulator alive and maintained.

What it does:

  • Emulates 132 AWS services on a single endpoint (localhost:4566)
  • Pure-Python core, with real Docker engines for Lambda, EC2, RDS, ECS, EKS, and OpenSearch
  • Point your existing AWS CLI, boto3, Terraform, CDK, or Pulumi at it, zero config
  • No account, no auth token, no telemetry. Persistent state across restarts
  • Optional fidelity knobs: IAM policy enforcement, throttling, latency injection, Lambda cold starts

Why I built it: kill the multi-minute deploy loop, drop the dev/test AWS bill to zero, and stop keeping real credentials on dev machines.

It's for fast local dev, testing, and learning, not production, and not bit-for-bit parity with the real cloud.

Repo: https://github.com/localemu/localemu Site: https://localemu.cloud/

Happy to answer questions, and feedback is very welcome.

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[–] tyler@programming.dev 16 points 1 day ago

Here’s the thing dude. There is no “none of your business” anymore. If an Israeli hacker group wrote the software, clearly it’s a bad idea to use it. Either don’t publish it, or state how it’s made.

People don’t want to support unethical behavior. Trying to hide it is even more unethical so of course people are going to analyze everything you’ve done.

Don’t announce the project if you don’t want it analyzed.