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Miaou

Self-hosted multi-room chat with markdown and code blocks

Chat & Communication ★ 554 stars Medium setup MIT

Miaou is a real-time chat server geared toward developer communities, with markdown formatting, syntax-highlighted code blocks, polls, and per-room moderation. It is the software behind the public Miaou chat used by Rust developers.

Official siteSource code

Key features

  • Markdown and code-block friendly chat
  • Multi-room with moderation
  • OAuth login support
  • Popular with developer communities

Strengths

  • Released under the MIT license
  • Written in JavaScript
  • Tiny footprint — runs in 256 MB RAM

Is Miaou secure?

OSV.dev has no published security advisories for Miaou's repository. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

Source: OSV.dev, checked 2026-10-14. How this is measured.

Miaou replaces

Self-hosted Discord alternativesSelf-hosted Slack alternatives

Health badge

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SelfHostIndex: 63 · good

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[![SelfHostIndex health score for Miaou](https://selfhostindex.com/badge/miaou.svg)](https://selfhostindex.com/app/miaou/)
HTML
<a href="https://selfhostindex.com/app/miaou/"><img src="https://selfhostindex.com/badge/miaou.svg" alt="SelfHostIndex health score for Miaou"></a>
reStructuredText
.. image:: https://selfhostindex.com/badge/miaou.svg
   :alt: SelfHostIndex health score for Miaou
   :target: https://selfhostindex.com/app/miaou/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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