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IoT & Smart Home · head to head

MQTT vs Home Assistant

MQTT logo

MQTT

IoT & Smart Home

Lightweight messaging protocol for IoT devices

From
Free
Rated
-
Full reviewWebsite
Home Assistant logo

Home Assistant

IoT & Smart Home

Open source home automation that puts local control and privacy first

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: MQTT mQTT is an OASIS standard messaging protocol maintained by a standards committee, not sold by a vendor; there is no company-controlled price list, subscription, or edition to compare because implementations are independent open source or commercial products built on the spec; Home Assistant add-ons run only on Home Assistant Operating System installations, and Container installations have no access to them
  • They diverge on capability: MQTT covers Publish-Subscribe, Home Assistant covers Local Control.

Where they differ

Only the attributes on which MQTT and Home Assistant actually diverge.

Attributes where MQTT and Home Assistant differ
AttributeMQTTHome Assistant
PlatformsAny platform, Embedded devices, Cloud, Edge computingLinux, Docker, Raspberry Pi, MacOS, Windows
Founded19992013

Identical on both: starting price (Free), pricing model (open-source), free tier (Yes), user rating (Not yet rated), category (IoT & Smart Home).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in MQTT

  • Publish-Subscribe
  • Lightweight
  • QoS Levels
  • Retained Messages
  • IoT platforms
  • Home automation
  • Cloud services
  • Edge devices

Only in Home Assistant

  • Local Control
  • Privacy First
  • Automation Engine
  • Custom Integrations
  • 150+ integrations
  • Voice Control
  • Mobile App
  • REST API

What people use each for

The jobs each tool is most often brought in to do.

MQTT

  • IoT messagingnot Home Assistant
  • Sensor datanot Home Assistant
  • Real-time updatesnot Home Assistant
  • Device telemetrynot Home Assistant

Home Assistant

  • Home automationnot MQTT
  • Energy monitoringnot MQTT
  • Security systemsnot MQTT
  • Device integrationnot MQTT

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

MQTT

  • MQTT is an OASIS standard messaging protocol maintained by a standards committee, not sold by a vendor; there is no company-controlled price list, subscription, or edition to compare because implementations are independent open source or commercial products built on the spec

Home Assistant

  • Add-ons run only on Home Assistant Operating System installations, and Container installations have no access to them
  • Thread and Z-Wave are controlled by add-ons, so a Container install has no out-of-the-box support for either
  • A Container installation means bringing your own Linux host with Docker and handling updates by hand
  • The recommended install path expects dedicated hardware such as a Raspberry Pi 4 or 5 with at least 2 GB of RAM, an Odroid, or an x86-64 machine
  • Every documented hardware option requires a wired Ethernet connection

Pricing, plan by plan

MQTT

Free
  • Open ProtocolFree
    • Publish-subscribe
    • Lightweight
    • QoS levels

Home Assistant

Free
  • Community EditionFree
    • Unlimited devices
    • Full automation
    • Local control

Which should you pick?

Choose MQTT if

  • You need publish-subscribe.
  • You want to start without paying.
  • You work on Any platform, Embedded devices, Cloud, Edge computing.
  • You also want lightweight.
MQTT review

Choose Home Assistant if

  • You need local control.
  • You want to start without paying.
  • You work on Linux, Docker, Raspberry Pi, MacOS, Windows.
  • You also want privacy first.
Home Assistant review

Questions people ask

Is MQTT or Home Assistant better?
Neither clearly leads. MQTT starts at Free and Home Assistant at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, MQTT or Home Assistant?
MQTT starts at Free and Home Assistant at Free.
Does MQTT or Home Assistant run on more platforms?
MQTT runs on Any platform, Embedded devices, Cloud, Edge computing. Home Assistant runs on Linux, Docker, Raspberry Pi, MacOS, Windows.
Can I use MQTT for free?
Both have a free tier, so you can try either at no cost before committing.
What is MQTT best used for?
MQTT is most often used for iot messaging, sensor data, real-time updates, device telemetry. Of those, iot messaging and sensor data are not what Home Assistant is typically brought in for.
What can MQTT do that Home Assistant cannot?
MQTT covers Publish-Subscribe, Lightweight, QoS Levels, Retained Messages. Home Assistant covers Local Control, Privacy First, Automation Engine, Custom Integrations.
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