Softwr

Energy · head to head

Azelio Energy Storage vs Stem Athena

A

Azelio Energy Storage

Energy

Thermal energy storage system design and optimization

From
On request
Rated
-
Full reviewWebsite
Stem Athena logo

Stem Athena

Energy

AI-driven clean energy optimization

From
On request
Rated
-
Full reviewWebsite

The short version

  • They diverge on capability: Azelio Energy Storage covers System design, Stem Athena covers AI optimization.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Azelio Energy Storage and Stem Athena actually diverge.

Attributes where Azelio Energy Storage and Stem Athena differ
AttributeAzelio Energy StorageStem Athena
Pricing modelquotesubscription
PlatformsDesktopWeb, Mobile, Api
Founded20122009

Identical on both: starting price (On request), free tier (No), user rating (Not yet rated), category (Energy).

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 Azelio Energy Storage

  • System design
  • Thermal simulation
  • Performance optimization
  • Integration planning
  • Technical documentation
  • On-premise deployment
  • Desktop support
  • English language support

Only in Stem Athena

  • AI optimization
  • Energy storage management
  • Demand charge reduction
  • Grid services
  • Solar integration
  • Weather forecasting
  • Performance analytics
  • Remote monitoring

What people use each for

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

Azelio Energy Storage

  • System designnot Stem Athena
  • Feasibility analysisnot Stem Athena

Stem Athena

  • Energy asset optimization and managementnot Azelio Energy Storage
  • Renewable energy integrationnot Azelio Energy Storage
  • Energy storage managementnot Azelio Energy Storage
  • Grid operations optimizationnot Azelio Energy Storage

Where each one falls short

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

Azelio Energy Storage

Nothing recorded yet. See the Azelio Energy Storage review.

Stem Athena

  • Stem's site names the product PowerTrack Optimizer, formerly Athena, so the Athena name is retired
  • No price, subscription fee or contract term is published anywhere on the site
  • The optimizer is one component of the wider PowerTrack suite alongside separate EMS, SCADA, Power Plant Controller and Logger products rather than a standalone licence
  • Design, procurement, commissioning and operation are sold as managed services separate from the software

Pricing, plan by plan

Azelio Energy Storage

On request

No published plan breakdown. See the Azelio Energy Storage review.

Stem Athena

On request
  • Commercial$undefined/custom
    • Energy storage optimization
    • Demand charge management
    • Rate optimization
  • Utility$undefined/custom
    • Grid services
    • VPP management
    • Frequency regulation
  • Enterprise$undefined/custom
    • Fleet management
    • Portfolio optimization
    • Custom integrations

Which should you pick?

Choose Azelio Energy Storage if

  • You need system design.
  • You work on Desktop.
  • You also want thermal simulation.
Azelio Energy Storage review

Choose Stem Athena if

  • You need ai optimization.
  • You work on Web, Mobile, Api.
  • You also want energy storage management.
Stem Athena review

Questions people ask

Is Azelio Energy Storage or Stem Athena better?
Neither clearly leads. Azelio Energy Storage starts at On request and Stem Athena at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Azelio Energy Storage or Stem Athena?
Azelio Energy Storage starts at On request and Stem Athena at On request.
Does Azelio Energy Storage or Stem Athena run on more platforms?
Azelio Energy Storage runs on Desktop. Stem Athena runs on Web, Mobile, Api.
What is Azelio Energy Storage best used for?
Azelio Energy Storage is most often used for system design, feasibility analysis. Of those, system design and feasibility analysis are not what Stem Athena is typically brought in for.
What can Azelio Energy Storage do that Stem Athena cannot?
Azelio Energy Storage covers System design, Thermal simulation, Performance optimization, Integration planning. Stem Athena covers AI optimization, Energy storage management, Demand charge reduction, Grid services.

Answered from the vendors’ own pages

Stem Athena: How much does Stem Athena cost?

Stem does not publish pricing for Athena on its website. The company appears to use a custom enterprise pricing model. Interested customers must contact Stem directly through their website to inquire about pricing and availability.

Source
Stem Athena: Does Stem offer a free trial?

The Stem website does not mention a free trial or demo option for Athena. Customers are directed to contact Stem's sales team for information about trial access or pricing.

Source
Share

Related pages

More on Azelio Energy Storage

More on Stem Athena

Keep looking

Other head to heads