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IoT & Smart Home · head to head

ESPHome vs HOMER Energy

ESPHome logo

ESPHome

IoT & Smart Home

Custom firmware for ESP8266/ESP32 smart home devices

From
Free
Rated
-
Full reviewWebsite
HOMER Energy logo

HOMER Energy

Energy & Utilities

Microgrid and distributed energy optimization software

From
Free
Rated
-
Full reviewWebsite

The short version

  • 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; HOMER Energy now owned by UL Solutions rather than being independent
  • They diverge on capability: ESPHome covers YAML Configuration, HOMER Energy covers Microgrid optimization.

Where they differ

Only the attributes on which ESPHome and HOMER Energy actually diverge.

Attributes where ESPHome and HOMER Energy differ
AttributeESPHomeHOMER Energy
Pricing modelopen-sourcesubscription
PlatformsESP8266, ESP32, Docker, Raspberry PiWindows, Web
CategoryIoT & Smart HomeEnergy & Utilities
Founded20182009

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

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 HOMER Energy

  • Microgrid optimization
  • Techno-economic analysis
  • Component library
  • Sensitivity analysis
  • Energy storage sizing
  • Renewable integration
  • Load profile analysis
  • Financial modeling

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 HOMER Energy
  • Replacing vendor cloud firmware on ESP based devices with locally controlled firmwarenot HOMER Energy
  • Integrating DIY devices into Home Assistant over a native API or MQTTnot HOMER Energy

HOMER Energy

  • Sizing and optimising off-grid and microgrid systemsnot ESPHome
  • Modelling the economics of solar, wind and battery combinationsnot ESPHome
  • Electric bill optimisation for grid-connected sites and EV chargingnot ESPHome
  • Utility-scale storage investment analysisnot ESPHome
  • Comparing least-cost configurations against load and resource datanot 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

HOMER Energy

  • Now owned by UL Solutions rather than being independent
  • Split into three separate products, HOMER Pro for off-grid and microgrids, HOMER Grid for bill optimisation and HOMER Front for utility-scale, so the right one depends on project type
  • Pricing is not shown on the product pages

Pricing, plan by plan

ESPHome

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

HOMER Energy

Free
  • HOMER GridFree
    • Grid-connected optimization
    • Basic components
    • Limited simulations
  • HOMER Pro$1500/year
    • Advanced optimization
    • All components
    • Unlimited simulations
  • Enterprise$undefined/year
    • Multi-user licenses
    • API access
    • Custom modules

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 HOMER Energy if

  • You need microgrid optimization.
  • You want to start without paying.
  • You work on Windows, Web.
  • You also want techno-economic analysis.
HOMER Energy review

Questions people ask

Is ESPHome or HOMER Energy better?
Neither clearly leads. ESPHome starts at Free and HOMER Energy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, ESPHome or HOMER Energy?
ESPHome starts at Free and HOMER Energy at Free.
Does ESPHome or HOMER Energy run on more platforms?
ESPHome runs on ESP8266, ESP32, Docker, Raspberry Pi. HOMER Energy runs on Windows, Web.
Can I use ESPHome for free?
Both have a free tier, so you can try either at no cost before committing.
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 HOMER Energy is typically brought in for.
What can ESPHome do that HOMER Energy cannot?
ESPHome covers YAML Configuration, OTA Updates, Home Assistant Native, Custom Components. HOMER Energy covers Microgrid optimization, Techno-economic analysis, Component library, Sensitivity analysis.
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