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MQTT vs ESPHome

MQTT logo

MQTT

Software

Lightweight messaging protocol for IoT devices

From
Free
Rated
-
Full reviewWebsite
ESPHome logo

ESPHome

Software

Custom firmware for ESP8266/ESP32 smart home devices

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; ESPHome eSPHome runs only on supported microcontrollers; the project recommends ESP32, ESP32-S3, ESP32-C3 and ESP32-C6 and advises against ESP8266 for new projects
  • They diverge on capability: MQTT covers Publish-Subscribe, ESPHome covers YAML Configuration.

Where they differ

Only the attributes on which MQTT and ESPHome actually diverge.

Attributes where MQTT and ESPHome differ
AttributeMQTTESPHome
PlatformsAny platform, Embedded devices, Cloud, Edge computingESP8266, ESP32, Docker, Raspberry Pi
Founded19992018

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

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 ESPHome

  • YAML Configuration
  • OTA Updates
  • Home Assistant Native
  • Custom Components
  • Home Assistant
  • MQTT
  • API
  • Native integration

What people use each for

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

MQTT

  • IoT messagingnot ESPHome
  • Sensor datanot ESPHome
  • Real-time updatesnot ESPHome
  • Device telemetrynot ESPHome

ESPHome

  • Building custom smart home sensors and switches on ESP32 hardwarenot MQTT
  • Replacing vendor cloud firmware on ESP based devices with locally controlled firmwarenot MQTT
  • Integrating DIY devices into Home Assistant over a native API or MQTTnot 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

ESPHome

  • ESPHome runs only on supported microcontrollers; the project recommends ESP32, ESP32-S3, ESP32-C3 and ESP32-C6 and advises against ESP8266 for new projects
  • Support for ESP32-H2, RP2040 and other newer chips is documented as less mature
  • Large displays and some sensors do not work well on ESP8266 because of its limited RAM, which is roughly a fifth of an ESP32

Pricing, plan by plan

MQTT

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

ESPHome

Free
  • CommunityFree
    • Full firmware
    • Home Assistant integration
    • Custom sensors

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 ESPHome if

  • You need yaml configuration.
  • You want to start without paying.
  • You work on ESP8266, ESP32, Docker, Raspberry Pi.
  • You also want ota updates.
ESPHome review

Questions people ask

Is MQTT or ESPHome better?
Neither clearly leads. MQTT starts at Free and ESPHome at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, MQTT or ESPHome?
MQTT starts at Free and ESPHome at Free.
Does MQTT or ESPHome run on more platforms?
MQTT runs on Any platform, Embedded devices, Cloud, Edge computing. ESPHome runs on ESP8266, ESP32, Docker, Raspberry Pi.
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 ESPHome is typically brought in for.
What can MQTT do that ESPHome cannot?
MQTT covers Publish-Subscribe, Lightweight, QoS Levels, Retained Messages. ESPHome covers YAML Configuration, OTA Updates, Home Assistant Native, Custom Components.
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