Willow vs CIM vs Facilio: Smart Building Platforms Compared (2026)
Willow, CIM and Facilio are three widely used smart building platforms that solve different problems. Willow builds a digital twin of a property's data. CIM analyses building performance and energy to cut operating cost. Facilio runs connected operations and maintenance across a portfolio. Which one fits depends on whether your priority is data modelling, performance analytics, or day-to-day O&M execution.
Buyers comparing these platforms are usually trying to answer one question: which layer of the building do I want software to own first? The three tools below overlap at the edges but each leads with a different job.
| Platform | Leads with | Best fit when your priority is |
|---|---|---|
| Willow | A digital twin — unifying BMS, IoT and document data into one queryable model of the asset | A single, structured data layer across a portfolio that other tools and agents can read |
| CIM | Building performance and energy analytics (the PEAK platform) | Driving energy, operating-cost and ESG performance from existing meter and BMS data |
| Facilio | Connected operations & maintenance — work orders, vendors, assets, IoT | Centralising O&M and property operations across many buildings |
Capabilities and feature sets change quickly — treat the table as a starting frame and confirm current scope directly with each vendor before you shortlist.
A digital twin, a performance-analytics engine and an O&M platform answer different questions. Many portfolios end up running more than one — a twin for the data model, an analytics layer for energy, an operations system for the work. The harder question is not which platform wins, but how the data from whichever system you run turns into decisions.
AI Smart Buildings is not a fourth platform on this list. It is the building-operations intelligence layer that reads whatever system you already run — twin, analytics, BMS or spreadsheets — and turns it into decisions: technical due diligence, an IPMVP-anchored energy baseline, a code-triggered upgrade register, and an AI-HVAC ROI band surfaced in about two minutes. Different job, complementary to all three platforms above.
See how that reads in practice on the AI-HVAC ROI calculator or the research library.
Software that connects a building's systems — controls, meters, sensors and work orders — so owners can monitor, analyse and operate the asset from one place.
None is strictly better; they target different jobs. Willow leads with the data twin, CIM with performance analytics, Facilio with operations and maintenance. Pick by the problem you are solving first.
No. A twin helps at portfolio scale, but you can capture energy and operating savings from existing meter and BMS data without one.
As an intelligence and advisory layer, not a replacement controls system — it reads platform data and turns it into due-diligence, energy M&V and retrofit decisions.
Run your own building's numbers before you commit to a platform.