No. 17 of 38 ·Message Broker Software

Mochi MQTT

Linux · Self-hosted · API

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Mochi MQTT is ranked #17 of 38 in message broker software on Freedom251. It runs on API, Linux, Self-hosted. There is a free plan.

Mochi MQTT plans and pricing

All plans

Mochi MQTT Server Free Open-source MQTT broker/server; standalone binary or embeddable Go library github.com · 4 Oct 2026

Compared on message broker software

Deployment model: self_hosted
Delivery guarantees: configurable
Supported protocols: MQTT 5.0, MQTT 3.1.1, MQTT 3.0.0

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The record

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.
Protocols: It implements MQTT 5 and supports MQTT 3.1.1 and 3.0 clients with hybrid compatibility.
MQTT features: Supported features include QoS 0, 1, and 2, retained messages, shared subscriptions, topic aliases, message expiry, and client session expiry.
Listeners: Built-in listeners include TCP, WebSocket, Unix sockets, HTTP stats, and HTTP health checks, with TLS configurable on listeners.
Extensibility: A stackable event hook system supports custom integrations for authentication, storage, debugging, and broker lifecycle events.
Persistence integrations: Built-in storage hooks support Redis, BadgerDB, and PebbleDB; the BoltDB hook is deprecated.
Authentication and ACL: The broker defaults to deny-all access and includes a rule-based authentication and access-control ledger hook.
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.
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.
Deployment: The project documents building and running the broker with Go and provides an official Docker image named mochimqtt/server.
Configuration limit: File-based configuration currently supports only built-in hooks and listeners, with at most one instance of each configured hook type.
Embedded client limit: The inline client does not support shared subscriptions, and inline subscriptions support QoS 0 only.
Roadmap: The project lists cluster support and enhanced metrics support as roadmap items.
License and support: The repository identifies an MIT license and invites users to report bugs, ask questions, and request features through GitHub issues.
Price from: Free

Where it ranks on Freedom251

Best Message Broker Software in 2026#17 of 38

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Sources

github.com/mochi-mqtt/server· checked 4 Oct 2026