Best Smart Buildings Companies in United States
The 85 best Smart Buildings companies in United States in 2026, ranked by funding and momentum. Funding, investors, founders, valuation, tech stack and live signals. Top: encelium.
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Ranked: Best Smart Buildings companies in United States
| # | Company | Disclosed funding | Last round | Stage | Founder | Founded | Tech stack | Patents & IP focus | Recent signals |
|---|---|---|---|---|---|---|---|---|---|
| 1 | encelium Encelium Technologies is an advanced technology development company focused on integrated lighting control… | $12M | 186 mo ago | Acquired | — | 2001 | — | — | — |
| 2 | powerx PowerX is a technology startup that creates a line of precision sensors that gather data about a home’s… | $4M | 60 mo ago | Seed | — | 2019 | WordPress Block EditorElementorWordPress+30 | — | — |
| 3 | mistbox Mistbox dramatically boosts the efficiency of air-conditioning units and saves users 30% on their cooling… | $2M | 81 mo ago | Seed | — | 2013 | — | 13 patents Misting and leak‑shutoff technologies for HVAC and water‑based cooling systems | — |
| 4 | occuspace The world's easiest and most scalable occupancy monitoring technology. | — | 60 mo ago | Seed | — | 2017 | — | — | — |
| 5 | Itron Itron is a technology company that offers products and services on energy and water resource management. | — | 63 mo ago | Public | — | 1977 | LiferayApple iCloud MailJava+21 | 2,529 patents Patents concentrated in electrical & electronics | — |
| 6 | ADMMicro ADMMicro offers a new breed of energy management and building controllers. | — | — | Acquired | — | 2002 | — | 2 patents IoT-enabled power and performance monitoring for lighting systems and vending machines | — |
| 7 | Advanced Automated Systems Advanced Automated Systems is an innovative, independent building automation and energy management firm… | — | — | Acquired | — | 1992 | — | — | — |
| 8 | Advanced Power Control Provider of building automation systems and installation and maintenance services. | — | — | Acquired | — | 1980 | — | — | — |
Top 5 Smart Buildings companies in United States
#1
Seed · Brooklyn, New York · founded 2019 · 19 employees$4Mraised▾
Developer of an energy management system intended to save money on water heating. The company's system can be attached to an existing water heater and calculates the temperature the user likes and heats only as much water as needed, enabling customers to save water heating bills and reduce carbon emissions.
#2
Seed · Houston, Texas · founded 2013 · 3 employees$2Mraised▾
Developer of a hardware device designed to create energy-saving air conditioners. The company's device significantly decreases the power consumption of air conditioners by using fine mists to cool intake air, enabling homeowners to buy energy efficiency product which reduces customers' electricity bills.
#3
Acquired · Markham, Ontario · founded 2001 · 51 employees$11.8Mraised▾
Provider of light management services intended to manage lighting space. The company's light management services offers integrated lighting control systems that gathers data from a range of lighting component suppliers to tailor lighting usage with changing requirements, enabling commercial buildings to maximize energy savings and provide attractive returns on investment.
#4
Seed · Westlake Village, California · founded 2017 · 30 employees—raised▾
Developer of crowd monitoring technology designed for optimum occupancy management and safety. The company's platform offers real-time and historical occupancy data technology by leveraging IoT sensors that analyze radio frequency signals, enabling clients to make space allocation and planning decisions.
#5
Public · Liberty Lake, Washington · founded 1977 · 547 employees—raised▾
Itron Inc provides solutions that measure, manage and analyze energy and water use. It operates under the Itron brand and manages and reports under three operating segments: Device Solutions, Networked Solutions, and Outcomes. The device Solutions segment includes hardware products used for measurement, control, or sense that do not have communications capability embedded for use with broader Itron systems.The networked Solutions segment includes a combination of communicating devices, network infrastructure, and associated application software designed and sold as a complete solution. The outcome segment includes their value-added, enhanced software and services which manage, organize, analyze, and interpret data to improve decision making, maximize operational profitability.
Funding & investor landscape
Market landscape — 10 sub-themes by coverage
Share of Smart Buildings coverage by sub-theme.
Regulatory-risk over time flat
Funding & growth over time
funding flat · growth flat
Common questions
Rohit lives in the feed. He covers what's moving right now — the funding rounds, launches and shifts breaking across the trade press — and ties them back to where the sector is heading.