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Energy · head to head

Stem Athena vs Uplight

Stem Athena logo

Stem Athena

Energy

AI-driven clean energy optimization

From
On request
Rated
-
Full reviewWebsite
Uplight logo

Uplight

Energy

Customer engagement, rebate marketplaces and demand flexibility software sold to regulated utilities

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Stem Athena stem's site names the product PowerTrack Optimizer, formerly Athena, so the Athena name is retired; Uplight the product assumes a regulated utility with commission-approved programmes, so competitive retailers and aggregators find much of the reporting and measurement machinery irrelevant while still paying for it.
  • They diverge on capability: Stem Athena covers AI optimization, Uplight covers Energy marketplace.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

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

Attributes where Stem Athena and Uplight differ
AttributeStem AthenaUplight
Pricing modelsubscriptionquote
PlatformsWeb, Mobile, ApiWeb, iOS, Android, API
Founded2009Unknown

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 Stem Athena

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

Only in Uplight

  • Energy marketplace
  • Personalised recommendations
  • Rates engagement
  • Demand response
  • Distributed energy resource management
  • Programme reporting
  • Home energy reports
  • OEM and device partnerships

What people use each for

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

Stem Athena

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

Uplight

  • A regulated utility that must deliver an approved energy efficiency programme and evidence the savings to its commissionnot Stem Athena
  • A utility launching a residential demand response programme built on customer-owned thermostats and batteriesnot Stem Athena
  • A utility moving customers onto time-of-use tariffs that needs enrolment journeys rather than a billing change alonenot Stem Athena
  • A utility that wants rebates applied at the point of purchase instead of processing claim forms after the factnot Stem Athena

Where each one falls short

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

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

Uplight

  • The product assumes a regulated utility with commission-approved programmes, so competitive retailers and aggregators find much of the reporting and measurement machinery irrelevant while still paying for it.
  • Procurement runs through long RFPs tied to rate cases and programme approvals, so implementation dates are set by a regulator rather than by the utility or the vendor and slip when filings slip.
  • The investor group of Schneider Electric, AES and Octopus Energy Group is made up of active energy market participants, which is a governance question a utility should raise in diligence rather than discover later.
  • The platform spans engagement, marketplace and demand management, and those capabilities were built or acquired separately, so a buyer taking one module gets less of the integration benefit than the platform story implies.
  • The reference base and product depth are strongest in North America, so a European or Asia-Pacific utility gets fewer comparable deployments and less functionality built around local market rules.

Pricing, plan by plan

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

Uplight

On request
  • Uplight platform$undefined/year
    • Quoted per utility programme by customer count and modules
    • Frequently structured around approved programme budgets and performance targets
    • Marketplace economics include product fulfilment and rebate handling

Which should you pick?

Choose Stem Athena if

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

Choose Uplight if

  • You need energy marketplace.
  • You work on Web, iOS, Android, API.
  • You also want personalised recommendations.
Uplight review

Questions people ask

Is Stem Athena or Uplight better?
Neither clearly leads. Stem Athena starts at On request and Uplight at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Stem Athena or Uplight?
Stem Athena starts at On request and Uplight at On request.
Does Stem Athena or Uplight run on more platforms?
Stem Athena runs on Web, Mobile, Api. Uplight runs on Web, iOS, Android, API.
What is Stem Athena best used for?
Stem Athena is most often used for energy asset optimization and management, renewable energy integration, energy storage management, grid operations optimization. Of those, energy asset optimization and management and renewable energy integration are not what Uplight is typically brought in for.
What can Stem Athena do that Uplight cannot?
Stem Athena covers AI optimization, Energy storage management, Demand charge reduction, Grid services. Uplight covers Energy marketplace, Personalised recommendations, Rates engagement, Demand response.

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
Uplight: Who owns Uplight?

It is privately held and backed by Schneider Electric, AES Corporation and Octopus Energy Group.

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
Uplight: Can a competitive energy retailer use it?

It can, but the product is designed around regulated programme delivery and measurement, so a retailer pays for machinery it does not need.

Uplight: Does Uplight do demand response as well as efficiency?

Yes. It acquired the AutoGrid distributed energy resource platform from Schneider Electric in 2024, which added device control and dispatch to the engagement business.

Uplight: Is pricing published?

No. Deals are quoted per programme and usually sized against an approved programme budget.

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