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ESPHome vs Johnson Controls Metasys

ESPHome logo

ESPHome

Software

Custom firmware for ESP8266/ESP32 smart home devices

From
Free
Rated
-
Full reviewWebsite
Johnson Controls Metasys logo

Johnson Controls Metasys

Software

Building management and control system platform

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only ESPHome has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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; Johnson Controls Metasys a Metasys server supports 1,300 devices and 65,000 objects, so larger estates require additional servers
  • They diverge on capability: ESPHome covers YAML Configuration, Johnson Controls Metasys covers HVAC control.

Where they differ

Only the attributes on which ESPHome and Johnson Controls Metasys actually diverge.

Attributes where ESPHome and Johnson Controls Metasys differ
AttributeESPHomeJohnson Controls Metasys
Starting priceFreeOn request
Pricing modelopen-sourcequote
Free tierYesNo
PlatformsESP8266, ESP32, Docker, Raspberry PiWeb, Mobile
Founded20181885

Identical on both: 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 ESPHome

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

Only in Johnson Controls Metasys

  • HVAC control
  • Building automation
  • Energy management
  • Security integration
  • Analytics dashboard
  • SOC2
  • SSL encryption
  • On-premise deployment

What people use each for

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

ESPHome

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

Johnson Controls Metasys

  • Building automation for offices, data centres, hospitals and universitiesnot ESPHome
  • Managing multi site campuses from one building management systemnot ESPHome
  • Meeting compliance and reporting requirements for regulated facilitiesnot ESPHome

Where each one falls short

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

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

Johnson Controls Metasys

  • A Metasys server supports 1,300 devices and 65,000 objects, so larger estates require additional servers
  • No hardware requirement, licensing model, subscription term or price is published on the product page; the routes offered are a demo booking and a contact form

Pricing, plan by plan

ESPHome

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

Johnson Controls Metasys

On request

No published plan breakdown. See the Johnson Controls Metasys review.

Which should you pick?

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

Choose Johnson Controls Metasys if

  • You need hvac control.
  • You work on Web, Mobile.
  • You also want building automation.
Johnson Controls Metasys review

Questions people ask

Is ESPHome or Johnson Controls Metasys better?
Neither clearly leads. ESPHome starts at Free and Johnson Controls Metasys at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESPHome or Johnson Controls Metasys?
ESPHome has a free tier; the other does not. Paid plans start at Free for ESPHome and On request for Johnson Controls Metasys.
Does ESPHome or Johnson Controls Metasys run on more platforms?
ESPHome runs on ESP8266, ESP32, Docker, Raspberry Pi. Johnson Controls Metasys runs on Web, Mobile.
Can I use ESPHome for free?
Yes. ESPHome has a free tier, so you can try it without paying. Johnson Controls Metasys starts at On request.
What is ESPHome best used for?
ESPHome is most often used for building custom smart home sensors and switches on esp32 hardware, replacing vendor cloud firmware on esp based devices with locally controlled firmware, integrating diy devices into home assistant over a native api or mqtt. Of those, building custom smart home sensors and switches on esp32 hardware and replacing vendor cloud firmware on esp based devices with locally controlled firmware are not what Johnson Controls Metasys is typically brought in for.
What can ESPHome do that Johnson Controls Metasys cannot?
ESPHome covers YAML Configuration, OTA Updates, Home Assistant Native, Custom Components. Johnson Controls Metasys covers HVAC control, Building automation, Energy management, Security integration.
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