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 2 days 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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[โ€“] nullroute@programming.dev 0 points 1 day ago (1 children)

I said it in my first reply, paragraph one. Not embarrassed. Calling someone defensive because they respond to attacks instead of capitulating is a rhetorical trick, not an argument. Attacking a stranger over a free open source project, for fun or out of some hidden envy, says more about you than about the project :).

[โ€“] prole@lemmy.blahaj.zone 1 points 1 day ago

I didn't attack anyone.