Softwr

Energy · head to head

Enerex vs Stem Athena

E

Enerex

Energy

Energy procurement and market intelligence

From
$500/month
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: Enerex covers Real-time pricing, Stem Athena covers AI optimization.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Enerex and Stem Athena actually diverge.

Attributes where Enerex and Stem Athena differ
AttributeEnerexStem Athena
Starting price$500/monthOn request
PlatformsWeb, ApiWeb, Mobile, Api
Founded20012009

Identical on both: pricing model (subscription), 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 Enerex

  • Real-time pricing
  • Supplier management
  • Contract optimization
  • Market analytics
  • RFP management
  • Risk analysis
  • Reporting
  • Invoice validation

Only in Stem Athena

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

Both cover

  • SOC2
  • Data encryption
  • Cloud deployment

What people use each for

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

Enerex

  • Energy procurementnot Stem Athena
  • Supplier managementnot Stem Athena
  • Cost reductionnot Stem Athena
  • Risk managementnot Stem Athena
  • Contract negotiationnot Stem Athena

Stem Athena

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

Where each one falls short

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

Enerex

Nothing recorded yet. See the Enerex 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

Enerex

$500/month
  • Professional$500/month
    • Market pricing
    • Supplier comparison
    • Contract management
  • Enterprise$1500/month
    • Advanced analytics
    • Portfolio optimization
    • Risk management
  • Custom$undefined/month
    • White label
    • Custom integrations
    • Dedicated support

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 Enerex if

  • You need real-time pricing.
  • You work on Web, Api.
  • You also want supplier management.
Enerex 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 Enerex or Stem Athena better?
Neither clearly leads. Enerex starts at $500/month and Stem Athena at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Enerex or Stem Athena?
Enerex starts at $500/month and Stem Athena at On request.
Does Enerex or Stem Athena run on more platforms?
Enerex runs on Web, Api. Stem Athena runs on Web, Mobile, Api.
What is Enerex best used for?
Enerex is most often used for energy procurement, supplier management, cost reduction, risk management. Of those, energy procurement and supplier management are not what Stem Athena is typically brought in for.
What can Enerex do that Stem Athena cannot?
Enerex covers Real-time pricing, Supplier management, Contract optimization, Market analytics. Stem Athena covers AI optimization, Energy storage management, Demand charge reduction, Grid services. Both handle SOC2, Data encryption, Cloud deployment.

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
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