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Arduino Cloud vs Wattwatchers EMS

Arduino Cloud logo

Arduino Cloud

Smart Home

Cloud platform for Arduino IoT devices and applications

From
Free
Rated
-
Full reviewWebsite
Wattwatchers EMS logo

Wattwatchers EMS

Energy

Smart building energy management system

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Arduino Cloud has a free tier, so it costs nothing to try first.
  • Each has a real cost: Arduino Cloud the free plan allows 2 connected devices, 5 variables each and one day of data retention; Wattwatchers EMS requires hardware installation at each monitoring point, increasing total cost of ownership
  • They diverge on capability: Arduino Cloud covers Device Connectivity, Wattwatchers EMS covers Real-time monitoring.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Arduino Cloud and Wattwatchers EMS actually diverge.

Attributes where Arduino Cloud and Wattwatchers EMS differ
AttributeArduino CloudWattwatchers EMS
Starting priceFreeOn request
Pricing modelsubscriptionUnknown
Free tierYesNo
PlatformsArduino devices, Cloud, Mobile app, Web dashboardWeb, iOS, Android, Cloud
CategorySmart HomeEnergy
Founded20052007

Identical on both: 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 Arduino Cloud

  • Device Connectivity
  • Cloud Storage
  • Real-Time Sync
  • Security
  • Arduino IDE
  • REST API
  • Integration services
  • Arduino devices support

Only in Wattwatchers EMS

  • Real-time monitoring
  • Energy analytics
  • Smart recommendations
  • Alert system
  • Home Assistant
  • Google Home
  • SSL encryption
  • Cloud deployment

Both cover

  • Mobile app

What people use each for

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

Arduino Cloud

  • Connecting Arduino boards to a cloud dashboardnot Wattwatchers EMS
  • Over-the-air firmware updates to deployed devicesnot Wattwatchers EMS
  • Logging sensor data and charting it over timenot Wattwatchers EMS
  • Triggering notifications from device thresholdsnot Wattwatchers EMS
  • Classroom IoT projects on the School plannot Wattwatchers EMS

Wattwatchers EMS

  • Energy optimizationnot Arduino Cloud
  • Cost reductionnot Arduino Cloud

Where each one falls short

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

Arduino Cloud

  • The free plan allows 2 connected devices, 5 variables each and one day of data retention
  • Free accounts are limited to 25 compilations a day and 10 trigger notifications a day
  • The Maker plan at $72 a year lifts devices to 25 and retention to 3 months, still for a single user
  • Team pricing jumps to $1,000 a year
  • Two years of data retention and unlimited ingestion require Enterprise

Wattwatchers EMS

  • Requires hardware installation at each monitoring point, increasing total cost of ownership
  • Built for small to medium portfolios; scaling to large portfolios may present usability challenges
  • Limited to energy monitoring; not a comprehensive building management system

Pricing, plan by plan

Arduino Cloud

Free
  • MakerFree
    • 2 devices
    • Basic features
    • Cloud access
  • Maker Plus$7/month
    • Up to 10 devices
    • Advanced features
    • Better storage

Wattwatchers EMS

On request

No published plan breakdown. See the Wattwatchers EMS review.

Which should you pick?

Choose Arduino Cloud if

  • You need device connectivity.
  • You want to start without paying.
  • You work on Arduino devices, Cloud, Mobile app, Web dashboard.
  • You also want cloud storage.
Arduino Cloud review

Choose Wattwatchers EMS if

  • You need real-time monitoring.
  • You work on Web, iOS, Android, Cloud.
  • You also want energy analytics.
Wattwatchers EMS review

Questions people ask

Is Arduino Cloud or Wattwatchers EMS better?
Neither clearly leads. Arduino Cloud starts at Free and Wattwatchers EMS at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Arduino Cloud or Wattwatchers EMS?
Arduino Cloud has a free tier; the other does not. Paid plans start at Free for Arduino Cloud and On request for Wattwatchers EMS.
Does Arduino Cloud or Wattwatchers EMS run on more platforms?
Arduino Cloud runs on Arduino devices, Cloud, Mobile app, Web dashboard. Wattwatchers EMS runs on Web, iOS, Android, Cloud.
Can I use Arduino Cloud for free?
Yes. Arduino Cloud has a free tier, so you can try it without paying. Wattwatchers EMS starts at On request.
What is Arduino Cloud best used for?
Arduino Cloud is most often used for connecting arduino boards to a cloud dashboard, over-the-air firmware updates to deployed devices, logging sensor data and charting it over time, triggering notifications from device thresholds. Of those, connecting arduino boards to a cloud dashboard and over-the-air firmware updates to deployed devices are not what Wattwatchers EMS is typically brought in for.
What can Arduino Cloud do that Wattwatchers EMS cannot?
Arduino Cloud covers Device Connectivity, Cloud Storage, Real-Time Sync, Security. Wattwatchers EMS covers Real-time monitoring, Energy analytics, Smart recommendations, Alert system. Both handle Mobile app.

Answered from the vendors’ own pages

Wattwatchers EMS: What data does Wattwatchers monitor?

Wattwatchers measures consumption at the device or circuit level in real-time, identifies equipment inefficiencies, and streams data through cloud dashboards for detailed energy consumption pattern analysis.

Source
Wattwatchers EMS: What web-based tools does Wattwatchers provide?

Wattwatchers provides Fleet Management for fleet overview and device health, an Onboarding tool for smartphone-based device configuration, and a Dashboard for customers to view sites and data.

Source
Wattwatchers EMS: What is the mydata.energy app?

mydata.energy is Wattwatchers' mobile application available on iPhone and Android that provides real-time energy management and monitoring for homes and small businesses.

Source
Wattwatchers EMS: How does ADEPT help with energy management?

ADEPT is Wattwatchers' agile development platform for distributed energy that enables fleet analytics, real-time performance analysis, and zero-code prototyping of custom analytics rules.

Source
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