Company lists · Data refreshed September 2026

Top 25 Building automation system companies based in the United States

Name: Building automation system companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 1,439 companies tracked

RevenueBase identified 1,439 building automation system companies headquartered in the United States as of September 2026 and tracks 30,303 professional contacts across them, including 13,474 with verified work emails. New York is the largest hub.

This list covers building automation system companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

1,439Companies

30,303Contacts tracked

13,474Verified emails

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The 25 largest building automation system companies based in the United States

Ranked by team size

Top 25 of 1,439 building automation system companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to building automation system companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Automated Logic Corporation	Strong evidence	Kennesaw, GA, United StatesHQ checked Sep 16, 2026	501-1,000	1,115 contacts →
	Strong evidence “Automated Logic Corporation (ALC) provides innovative building automation and control systems.” Source: RevenueBase Database · checked Sep 16, 2026
2	Mckenney's, INC	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,077 contacts →
	Indirect evidence “McKenney’s is the Southeast’s most trusted name in facility construction, operation and maintenance.” Source: RevenueBase Database · checked Sep 16, 2026
3	Albireo Energy	Partial evidence	Edison, NJ, United StatesHQ checked Sep 16, 2026	1,001-5,000	669 contacts →
	Partial evidence “Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.” Source: RevenueBase Database · checked Sep 16, 2026
4	Rovisys Building Technologies	Strong evidence	Aurora, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	547 contacts →
	Strong evidence “As part of the RoviSys family of companies, we deliver vendor independent building automation, electrical power management, facility monitoring, and systems integration solutions…” Source: RevenueBase Database · checked Sep 16, 2026
5	MSS Solutions, LLC	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 16, 2026	501-1,000	470 contacts →
	Indirect evidence “Since 1996, MSS has made thousands of facilities more efficient, comfortable, secure and reliable for owners, operators and occupiers across the Carolinas and throughout North…” Source: RevenueBase Database · checked Sep 16, 2026
6	Long Building Technologies	Partial evidence	Littleton, CO, United StatesHQ checked Sep 16, 2026	501-1,000	453 contacts →
	Partial evidence “Since 1965, LONG has been in the business of building performance; making them automated, efficient, green, and safe.” Source: RevenueBase Database · checked Sep 16, 2026
7	UMC	Partial evidence	Lynnwood, WA, United StatesHQ checked Sep 16, 2026	201-500	393 contacts →
	Partial evidence “UMC helps clients solve the complex challenges of built environments and their systems.” Source: RevenueBase Database · checked Sep 16, 2026
8	AIR Systems, INC	Strong evidence	San Jose, CA, United StatesHQ checked Sep 16, 2026	201-500	348 contacts →
	Strong evidence “Whether building quality work environments, valuable relationships or community ties, Air Systems never cuts corners.” Source: RevenueBase Database · checked Sep 16, 2026
9	Brady Services	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 16, 2026	501-1,000	340 contacts →
	Partial evidence “Since 1962, Brady has been committed to delivering innovative, sustainable building solutions that drive long-term success for our customers.” Source: RevenueBase Database · checked Sep 16, 2026
10	Havtech	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 16, 2026	201-500	333 contacts →
	Indirect evidence “Havtech delivers innovative commercial and industrial HVAC solutions across Maryland, Washington, D.C, Virginia, Pennsylvania, and West Virginia.” Source: RevenueBase Database · checked Sep 16, 2026
11	Sunbelt Controls	Strong evidence	Pleasanton, CA, United StatesHQ checked Sep 16, 2026	201-500	322 contacts →
	Strong evidence “Sunbelt Controls is a leading full-service building automation contractor for new construction and retrofit projects in the Western United States.” Source: RevenueBase Database · checked Sep 16, 2026
12	Entech Sales & Service, LLC	Partial evidence	Dallas, TX, United StatesHQ checked Sep 16, 2026	201-500	316 contacts →
	Partial evidence “Entech consists of several cohesive business groups working together to provide services for commercial and industrial buildings.” Source: RevenueBase Database · checked Sep 16, 2026
13	Ermco, INC	Indirect evidence	Greenwood, IN, United StatesHQ checked Sep 16, 2026	201-500	304 contacts →
	Indirect evidence “From our beginning in 1962 as a small electrical maintenance company in downtown Indianapolis with a staff of three, ERMCO, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
14	ATS Automation, INC	Strong evidence	Renton, WA, United StatesHQ checked Sep 16, 2026	201-500	287 contacts →
	Strong evidence “ATS, established in 1986, specializes in custom engineered and installed Building Automation Systems control solutions for buildings’ mechanical and electrical systems, allowing…” Source: RevenueBase Database · checked Sep 16, 2026
15	Holaday-Parks, INC	Indirect evidence	Tukwila, WA, United StatesHQ checked Sep 16, 2026	201-500	218 contacts →
	Indirect evidence “As one of the largest full service mechanical contractors headquartered in the Pacific Northwest, Holaday Parks has grown well beyond Seattle.” Source: RevenueBase Database · checked Sep 16, 2026
16	Control4	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 16, 2026	501-1,000	215 contacts →
	Strong evidence “Control4 is a leading global provider of automation and networking systems for homes and businesses, offering personalized control of lighting, music, video, comfort, security…” Source: RevenueBase Database · checked Sep 16, 2026
17	Gardiner	Partial evidence	Solon, OH, United StatesHQ checked Sep 16, 2026	201-500	205 contacts →
	Partial evidence “At Gardiner, we've gotten used to clients being shocked by everything we can do to improve a building.” Source: RevenueBase Database · checked Sep 16, 2026
18	Emcor Services NEW England Mechanical	Strong evidence	Windsor, CT, United StatesHQ checked Sep 16, 2026	201-500	195 contacts →
	Strong evidence “EMCOR Services New England Mechanical Services (NEMSI) offers a full range of mechanical, electrical, plumbing, sheetmetal, building automation, and facilities services that…” Source: RevenueBase Database · checked Sep 16, 2026
19	KMC Controls	Strong evidence	New Paris, IN, United StatesHQ checked Sep 16, 2026	51-200	192 contacts →
	Strong evidence “KMC Controls is an independent American manufacturer of building automation and IoT solutions for system integrators, system distributors, IT providers, and OEM partners.” Source: RevenueBase Database · checked Sep 16, 2026
20	Haynes Mechanical Systems	Strong evidence	Greenwood Village, CO, United StatesHQ checked Sep 16, 2026	201-500	190 contacts →
	Strong evidence “Haynes Mechanical Systems has been keeping commercial buildings running strong since 1968.” Source: RevenueBase Database · checked Sep 16, 2026
21	Total Mechanical	Indirect evidence	Pewaukee, WI, United StatesHQ checked Sep 16, 2026	201-500	186 contacts →
	Indirect evidence “TOTAL Mechanical is a single-source mechanical contractor, specializing in the design, engineering, manufacturing, installation, maintenance and repair of commercial, industrial…” Source: RevenueBase Database · checked Sep 16, 2026
22	Maxair Mechanical	Indirect evidence	Marietta, GA, United StatesHQ checked Sep 16, 2026	201-500	183 contacts →
	Indirect evidence “MAXAIR Mechanical, founded in 1988, is a people first company.” Source: RevenueBase Database · checked Sep 16, 2026
23	Emcor Services Aircond	Strong evidence	Smyrna, GA, United StatesHQ checked Sep 16, 2026	201-500	178 contacts →
	Strong evidence “Backed by 80 years of experience, the more than 300 associates at EMCOR Services Aircond design and deliver comprehensive, timely, and cost effective HVAC and building system…” Source: RevenueBase Database · checked Sep 16, 2026
24	AC Corporation	Partial evidence	Greensboro, NC, United StatesHQ checked Sep 16, 2026	201-500	167 contacts →
	Partial evidence “Since 1935, AC Corporation has provided quality systems for the industrial and commercial markets.” Source: RevenueBase Database · checked Sep 16, 2026
25	Syserco, INC	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 16, 2026	51-200	164 contacts →
	Indirect evidence “Syserco is an industry leader delivering Energy Management Solutions and Services to commercial and industrial facilities ranging from K-12 Schools, to High Rises, to…” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: building automation system companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names building automation system companies.
Partial evidence: Its own public description names part of building automation system companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name building automation system companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,439 building automation system companies based in the United States

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Building automation system companies based in the United States at a glance

As of Sep 16, 2026

44.5%Verified-email coverage

21.1Average contacts per company

11-50Median size (employees)

2.1%Largest-city concentration · New York

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

557

11-50

576

51-200

228

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 1,439 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among building automation system companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “building automation system companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names building automation system companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among building automation system companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 13,474 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Building automation system companies by metro

Building automation system companies in New York30
Building automation system companies in Houston28

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names building automation system companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many building automation system companies are there based in the United States?

RevenueBase identified 1,439 building automation system companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Automated Logic Corporation, headquartered in Kennesaw, tops this list with the largest team on record.

Which city has the most building automation system companies?

New York leads with 30 headquartered companies, followed by Houston (28) and Miami (18).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 13,474 verified decision-maker contacts tracked across these 1,439 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.