Top 10 Best Energy Audit Software of 2026

RETScreen is a comprehensive clean energy management software suite developed by Natural Resources Canada, specializing in energy performance analysis, feasibility studies, and project optimization for renewables, cogeneration, and efficiency measures. It enables detailed energy audits through baseline modeling, benchmarking against industry standards, and simulation of energy savings, GHG reductions, and financial viability. Trusted globally by governments, utilities, and consultants, it supports pre-feasibility to detailed audits with integrated databases for equipment and climate data.

EnergyCAP is a robust energy management platform specializing in utility bill tracking, auditing, and analytics for multi-site organizations. It automates data aggregation from diverse utility providers, performs bill validation and anomaly detection, and delivers customizable reports to support energy audits and cost optimization. With tools for benchmarking, forecasting, and sustainability tracking, it helps users identify inefficiencies and verify savings from conservation measures.

DesignBuilder is a comprehensive energy modeling software that enables users to build detailed 3D models of buildings and perform dynamic simulations for energy consumption, thermal comfort, daylighting, and airflow analysis using the EnergyPlus engine. It supports energy audits by providing accurate predictions of building performance, retrofit optimization, and compliance with standards like LEED, BREEAM, and Part L. The software streamlines the process from modeling to reporting, making it ideal for assessing energy efficiency in existing and new buildings.

Wrightsoft Right-Suite is a comprehensive HVAC design and analysis software suite tailored for residential energy audits and system sizing. It provides ACCA-compliant Manual J load calculations, Manual S equipment selection, Manual D duct design, and detailed energy modeling to assess building performance and efficiency. The platform integrates 2D/3D drawing tools with automated calculations, enabling auditors to generate accurate reports and proposals for energy-saving HVAC upgrades.

IESVE (Integrated Environmental Solutions Virtual Environment) is a powerful building performance simulation platform designed for detailed energy modeling, analysis, and optimization of buildings. It excels in energy audits by enabling whole-building simulations, retrofit scenario testing, and compliance checks against standards like ASHRAE 90.1, LEED, and BREEAM. The suite integrates modules for thermal dynamics, daylighting, airflow (CFD), and renewables, providing comprehensive insights into energy consumption and efficiency improvements.

eQUEST is a free, open-source building energy simulation software based on the DOE-2.2 engine, enabling detailed whole-building modeling for energy audits, code compliance, and performance analysis. It supports hourly simulations of energy use, costs, peak demands, and comfort metrics across various building types, systems, and climates. Widely used for Title 24 compliance, LEED certification, and retrofit evaluations, it provides zone-level granularity for identifying energy-saving opportunities.

OpenStudio is an open-source whole-building energy modeling platform developed by NREL, enabling users to create detailed 3D building models and run energy simulations using the EnergyPlus engine. It supports energy audits by modeling as-built conditions, testing retrofit scenarios, and generating performance metrics for efficiency improvements. The software integrates geometry sketching, measures for automation, and reporting tools tailored for compliance and optimization workflows.

EnergyPlus is a state-of-the-art, open-source whole-building energy simulation program developed by the U.S. Department of Energy for detailed modeling of building energy performance. It simulates heating, cooling, lighting, ventilation, and envelope interactions with high fidelity, making it suitable for energy audits requiring precise baseline and retrofit analysis. Users create input files to define geometry, schedules, and systems, with outputs for energy use, comfort, and costs. While powerful, it demands technical expertise for effective use in audit workflows.

REM/Rate from REM/Design is a veteran residential energy modeling software primarily used for HERS ratings, home energy audits, and compliance with building codes like IECC and ENERGY STAR. It enables detailed simulations of a home's energy performance by inputting envelope, HVAC, lighting, and appliance data to calculate usage and recommend improvements. The tool produces professional reports for certifications, making it a staple for accredited energy raters.

Energy Audit Pro is a Windows-based software tailored for professional energy auditors, enabling detailed data collection from field tests like blower door, duct leakage, and combustion safety analysis. It performs precise energy calculations, models building performance, and generates customizable PDF reports for residential audits. The tool integrates seamlessly with The Energy Conservatory's diagnostic hardware for accurate measurements.