4.6/5
Free, open-source EnergyPlus front-end from NREL with a SketchUp plugin, a Measures library for parametric analysis, and Radiance daylighting support.
Vaporware Risk
Energy & Sustainability Analysis
Building energy modeling, daylighting, and sustainability analysis for design-stage decisions.
7 tools reviewed, sorted by composite score.
4.4/5
Free open-source Grasshopper plugins for climate analysis, energy modeling, daylighting, CFD, and urban simulation, with a commercial cloud layer via Pollination.
4.4/5
Free, DOE-funded whole-building energy simulation engine with sub-hourly HVAC, lighting, and water modeling -- the engine under most commercial tools on this list.
Vaporware Risk
3.8/5
Whole-building simulation suite covering thermal, HVAC, daylighting, CFD, and compliance for LEED, BREEAM, and Passivhaus.
AI WashingHidden Pricing
3.8/5
EnergyPlus-based building simulation software with a graphical interface for energy, daylighting, HVAC, CFD, and LEED/BREEAM compliance.
AI Washing
3.4/5
SketchUp-integrated energy and daylighting analysis plugin that runs full annual EnergyPlus and Radiance simulations without leaving the modeler.
Vendor Lock-inAI WashingHidden Pricing
3.2/5
Rhino and Grasshopper plugin for daylighting, annual glare, energy modeling, and PV analysis using a novel path-tracing Radiance engine.
Vendor Lock-inAI WashingHidden Pricing
Comparison Table
| Tool | Composite | Maturity | Specificity | Integration | Value | Evidence | Pricing | Flags |
|---|---|---|---|---|---|---|---|---|
| OpenStudio | 4.6 | 5 | 4 | 4 | 5 | 5 | free | Vaporware Risk |
| Ladybug Tools | 4.4 | 4 | 5 | 3 | 5 | 5 | freemium | none |
| EnergyPlus | 4.4 | 5 | 5 | 2 | 5 | 5 | free | Vaporware Risk |
| IES VE | 3.8 | 5 | 5 | 3 | 2 | 4 | contact-sales | AI WashingHidden Pricing |
| DesignBuilder | 3.8 | 4 | 4 | 3 | 4 | 4 | subscription | AI Washing |
| Sefaira | 3.4 | 4 | 4 | 3 | 2 | 4 | subscription | Vendor Lock-inAI WashingHidden Pricing |
| ClimateStudio | 3.2 | 3 | 5 | 3 | 2 | 3 | contact-sales | Vendor Lock-inAI WashingHidden Pricing |
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