01
Audit and model
Collect the data you have, refine assumptions, compare modeled use to bills, and see savings change as the home model improves.
See OptiMiser Zeus →Energy modeling for real-world decisions
Better analysis. Faster audits. More confident upgrades.
Audit software for building performance professionals, weatherization agencies, and energy program implementers.
Bill-calibrated modeling programs can defend — BPI-2400 aligned, 340,000+ audits delivered.
Trusted by utility programs and contractors nationwide
ICF / CEC Equitable Building Decarbonization
Resource Innovations
APS
Focus on Energy
NYSERDA
MassEnergyInsight
Boston Housing Authority
PowerOptions
Green Homeowners United
- 340,000+ audits
- BPI-2400 aligned modeling
- IRA HOMES & WAP program delivery
One platform, multiple workflows
One house, or a whole program.
Use a short field workflow for a single home, or connect audits, projects, quality checks, and reporting across a program.
02
Design the work
Evaluate interacting measures, size equipment, build a workscope, and turn technical findings into decisions customers can understand.
Explore modeling tools →03
Run a program
Connect field teams, program staff, project data, QA, and reporting in workflows designed around your requirements.
Explore program solutions →
Utility bill calibration
Analysis grounded in reality.
OptiMiser compares the model to the household’s utility bills, so the savings start from how the home actually uses energy.
Mobile data entry on tablet or phone keeps crews in the field; Nexus CRM modules connect projects, quality checks, and program reporting.
Honest
modeling based on real data
Deep
insights in envelope performance, electrification, and renewables
Clear
customer-ready reporting
Coming soon
Multifamily and commercial modeling in Zeus
Multifamily and commercial modeling are coming to Zeus, alongside the single-family audits crews already run.
Find your path
For crews, contractors, and program staff.
01
Auditors and contractors
Go from the assessment to a tailored package of improvements, with less software time, and deliver a report the homeowner can follow.
Explore professional software →02
Program implementers
Configure stages, QA checks, incentives, and reports so every contractor runs the same program rules.
Explore program solutions →03
Utilities and agencies
Stand behind the savings numbers, and keep project data consistent across contractors and regions.
See platform capabilities →From our users
What auditors and program partners say
My experiences with you guys has always been a 5 Star out of 5.
We have a really robust report that none of our competition uses, and those details make the difference. OptiMiser cuts out duplicate entries and auto-populates picture captions — that saved a lot of time.
So that’s the reason we went with OptiMiser: to save the contractors time and money. And that has worked.
From the field
News and insights from OptiMiser.
Recent updates from the OptiMiser team — product news, program lessons, and technical notes.
OptiMiser backs top IRA HOMES contractor in America
As of February 2026, approximately 800 IRA HOMES jobs have been completed nationally. Wisconsin leads the way, and OptiMiser is proud to partner with Green Homeowners United.
Contractors in First-In-Nation IRA HOMES Program Using OptiMiser
Wisconsin's Focus on Energy launched the nation's first IRA HOMES program, and contractors are using OptiMiser to streamline whole-home retrofit projects.
High Realization Rates for Modeled Savings: What the LBNL PAYS Report Reveals About the Potential Success of IRA Home Energy Rebate Programs
A Lawrence Berkeley National Laboratory report on Pay As You Save programs offers lessons for IRA HOMES rebate design, calibrated modeling, and program quality.
Talk with us
Tell us how your audits or program work today.
We shape the software around how jobs are done in the field, and around the forms and reports the program needs at the end.