Mochi MQTT

What it does

Authentication and ACL

The broker defaults to deny-all access and includes a rule-based authentication and access-control ledger hook.checked 4 Oct 2026

Configuration limit

File-based configuration currently supports only built-in hooks and listeners, with at most one instance of each configured hook type.checked 4 Oct 2026

Default limit

The default maximum message expiry interval is 24 hours, which the project says helps limit denial-of-service exposure from accumulating retained or in-flight messages.checked 4 Oct 2026

Deployment

The project documents building and running the broker with Go and provides an official Docker image named mochimqtt/server.checked 4 Oct 2026

Embedded client limit

The inline client does not support shared subscriptions, and inline subscriptions support QoS 0 only.checked 4 Oct 2026

Extensibility

A stackable event hook system supports custom integrations for authentication, storage, debugging, and broker lifecycle events.checked 4 Oct 2026

License and support

The repository identifies an MIT license and invites users to report bugs, ask questions, and request features through GitHub issues.checked 4 Oct 2026

Listeners

Built-in listeners include TCP, WebSocket, Unix sockets, HTTP stats, and HTTP health checks, with TLS configurable on listeners.checked 4 Oct 2026

MQTT features

Supported features include QoS 0, 1, and 2, retained messages, shared subscriptions, topic aliases, message expiry, and client session expiry.checked 4 Oct 2026

Persistence integrations

Built-in storage hooks support Redis, BadgerDB, and PebbleDB; the BoltDB hook is deprecated.checked 4 Oct 2026

Protocols

It implements MQTT 5 and supports MQTT 3.1.1 and 3.0 clients with hybrid compatibility.checked 4 Oct 2026

Roadmap

The project lists cluster support and enhanced metrics support as roadmap items.checked 4 Oct 2026

Security guidance

The project warns that its allow-all authentication hook should be used only for development, testing, or debugging, not on the internet or untrusted networks.checked 4 Oct 2026

What it does

Mochi MQTT is an embeddable Go broker/server for telemetry and Internet of Things projects, available as a standalone binary or library.checked 4 Oct 2026