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Energy · head to head

Aurora Solar vs Stem Athena

Aurora Solar logo

Aurora Solar

Energy

The leading solar design and sales platform

From
$135/month
Rated
-
Full reviewWebsite
Stem Athena logo

Stem Athena

Energy

AI-driven clean energy optimization

From
On request
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Aurora Solar both published plans are single user, so a second designer means a second licence; Stem Athena stem's site names the product PowerTrack Optimizer, formerly Athena, so the Athena name is retired
  • They diverge on capability: Aurora Solar covers 3D solar 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 Aurora Solar and Stem Athena actually diverge.

Attributes where Aurora Solar and Stem Athena differ
AttributeAurora SolarStem Athena
Starting price$135/monthOn request
PlatformsWeb, ApiWeb, Mobile, Api
Founded20132009

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 Aurora Solar

  • 3D solar design
  • Shade analysis
  • LIDAR integration
  • Performance simulation
  • Sales proposals
  • Financing options
  • Permit packages
  • NEC code compliance

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

What people use each for

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

Aurora Solar

  • Designing and simulating residential and commercial solar installationsnot Stem Athena
  • Producing shade analysis and sales proposals for solar projectsnot Stem Athena

Stem Athena

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

Where each one falls short

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

Aurora Solar

  • Both published plans are single user, so a second designer means a second licence
  • Projects are capped at 50 a month on both Basic and Premium, so the tiers differ on features rather than volume
  • LIDAR assisted modelling, shade reports and battery storage modelling all require Premium at $259 a month
  • API access and integrations are Enterprise only, which is priced per project rather than per month
  • Paying monthly rather than annually costs $288 more a year on Basic and $468 on Premium

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

Aurora Solar

$135/month
  • Basic$159/month
    • Tablet-friendly sales proposals
    • Industry-leading design accuracy
    • HD imagery
  • Premium$259/month
    • Tablet-friendly sales proposals
    • Industry-leading design accuracy
    • HD imagery
  • Enterprise$null/project
    • All Premium features
    • AI-assisted site models
    • APIs and integrations

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 Aurora Solar if

  • You need 3d solar design.
  • You work on Web, Api.
  • You also want shade analysis.
Aurora Solar 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 Aurora Solar or Stem Athena better?
Neither clearly leads. Aurora Solar starts at $135/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, Aurora Solar or Stem Athena?
Aurora Solar starts at $135/month and Stem Athena at On request.
Does Aurora Solar or Stem Athena run on more platforms?
Aurora Solar runs on Web, Api. Stem Athena runs on Web, Mobile, Api.
What is Aurora Solar best used for?
Aurora Solar is most often used for designing and simulating residential and commercial solar installations, producing shade analysis and sales proposals for solar projects. Of those, designing and simulating residential and commercial solar installations and producing shade analysis and sales proposals for solar projects are not what Stem Athena is typically brought in for.
What can Aurora Solar do that Stem Athena cannot?
Aurora Solar covers 3D solar design, Shade analysis, LIDAR integration, Performance simulation. Stem Athena covers AI optimization, Energy storage management, Demand charge reduction, Grid services. Both handle SOC2.

Answered from the vendors’ own pages

Aurora Solar: How much does Aurora Solar cost per month?

Aurora Solar Basic costs $159/month billed monthly or $135/month billed annually (save $288/year). Premium costs $259/month monthly or $220/month annually (save $468/year). Enterprise pricing is custom per project. Monthly plans have no minimum commitment and can be cancelled at any billing period end. Annual plans require a one-year commitment.

Source
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
Aurora Solar: What features does Aurora Solar Premium add over Basic?

Premium adds LIDAR-assisted modeling, bankable shade reports, and battery modeling for backup, self-consumption, and arbitrage scenarios. Both tiers include 50 projects per month and support 1 user.

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
Aurora Solar: How many users and projects can I have on Aurora Solar?

Basic and Premium plans support 1 user with a 50-project monthly limit. Enterprise plans support unlimited users and custom project limits; Enterprise pricing and terms are custom and determined through sales.

Source
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