Company lists · Data refreshed September 2026

Top 25 Plc programming companies based in the United States

Name: Plc programming 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 20, 2026 1,186 companies tracked

RevenueBase identified 1,186 plc programming companies headquartered in the United States as of September 2026 and tracks 39,915 professional contacts across them, including 14,067 with verified work emails. Houston is the largest hub.

This list covers plc programming 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 20, 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 20, 2026 86% judged on-target in blind review

1,186Companies

39,915Contacts tracked

14,067Verified emails

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The 25 largest plc programming companies based in the United States

Ranked by team size

Top 25 of 1,186 plc programming companies based in the United States, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to plc programming 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	Rockwell Automation	Indirect evidence	Milwaukee, WI, United StatesHQ checked Sep 20, 2026	10001+	20,582 contacts →
	Indirect evidence “At Rockwell Automation, we connect the imaginations of people with the potential of technology to expand what is humanly possible, making the world more intelligent, more…” Source: RevenueBase Database · checked Sep 20, 2026
2	Mitsubishi Electric Automation, INC	Indirect evidence	Vernon Hills, IL, United StatesHQ checked Sep 20, 2026	n/a	2,012 contacts →
	Indirect evidence “The sole mission of Mitsubishi Electric Automation Americas, is to support the factory automation needs of North and Latin American customers with combined sales, marketing…” Source: RevenueBase Database · checked Sep 20, 2026
3	Rovisys	Indirect evidence	Aurora, OH, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,159 contacts →
	Indirect evidence “As one of the world's largest independent systems integrators, RoviSys delivers comprehensive automation, digital transformation, manufacturing execution (MES), Industrial AI…” Source: RevenueBase Database · checked Sep 20, 2026
4	Awc, INC	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 20, 2026	501-1,000	848 contacts →
	Indirect evidence “We love our customers and are committed to providing Better Automation and Controls Solutions, Products, Engineering, Services and Support to them.” Source: RevenueBase Database · checked Sep 20, 2026
5	Rovisys Building Technologies	Indirect evidence	Aurora, OH, United StatesHQ checked Sep 20, 2026	1,001-5,000	547 contacts →
	Indirect 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 20, 2026
6	R&e Automated	Indirect evidence	Bruce Township, MI, United StatesHQ checked Sep 20, 2026	501-1,000	383 contacts →
	Indirect evidence “R&E Automated Systems is an internationally recognized leader in automation, engineering and field service management.” Source: RevenueBase Database · checked Sep 20, 2026
7	Automationdirect	Partial evidence	Cumming, GA, United StatesHQ checked Sep 20, 2026	201-500	279 contacts →
	Partial evidence “In business since 1994, AutomationDirect is a distributor offering thousands of industrial automation products for electrical control systems, including PLCs, operator interfaces…” Source: RevenueBase Database · checked Sep 20, 2026
8	Koops Automation Systems	Indirect evidence	Holland, MI, United StatesHQ checked Sep 20, 2026	201-500	277 contacts →
	Indirect evidence “Specializing in factory automation systems, Koops designs and builds innovative special machines and automated equipment for leading, world-class manufacturers across a broad…” Source: RevenueBase Database · checked Sep 20, 2026
9	Actemium Avanceon	Indirect evidence	Exton, PA, United StatesHQ checked Sep 20, 2026	51-200	221 contacts →
	Indirect evidence “Avanceon, under VINCI Energies brand Actemium, is a systems integrator company that develops, executes, and supports automation/information solutions for manufacturing and utility…” Source: RevenueBase Database · checked Sep 20, 2026
10	Idec USA	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	216 contacts →
	Indirect evidence “A global manufacturer with locations throughout Asia, North and South America, and Europe, IDEC Corporation has provided reliable automation, control and safety products worldwide…” Source: RevenueBase Database · checked Sep 20, 2026
11	Applied Control	Indirect evidence	Centennial, CO, United StatesHQ checked Sep 20, 2026	201-500	180 contacts →
	Indirect evidence “Applied Control comes alongside you as a partner who understands your plant, your processes, and the pressure you face to deliver performance without interruption.” Source: RevenueBase Database · checked Sep 20, 2026
12	Vertech	Indirect evidence	Phoenix, AZ, United StatesHQ checked Sep 20, 2026	201-500	175 contacts →
	Indirect evidence “Vertech is an industrial control systems integration firm providing a complete range of engineering and technical services.” Source: RevenueBase Database · checked Sep 20, 2026
13	AA Electric	Indirect evidence	Lakeland, FL, United StatesHQ checked Sep 20, 2026	n/a	161 contacts →
	Indirect evidence “AA Electric is your single source for machine control and automation specialty electrical products.” Source: RevenueBase Database · checked Sep 20, 2026
14	Linear Controls	Indirect evidence	Lafayette, LA, United StatesHQ checked Sep 20, 2026	51-200	146 contacts →
	Indirect evidence “Linear Controls, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
15	Control System Integrators	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 20, 2026	51-200	138 contacts →
	Indirect evidence “We specialize in designing and implementing turnkey industrial controls and automation systems.” Source: RevenueBase Database · checked Sep 20, 2026
16	Alliance Automation, LLC	Indirect evidence	Van Wert, OH, United StatesHQ checked Sep 20, 2026	51-200	127 contacts →
	Indirect evidence “Simply put, we design and build the machines that enable our customers to build their products.” Source: RevenueBase Database · checked Sep 20, 2026
17	Indicon LLC	Indirect evidence	Sterling Heights, MI, United StatesHQ checked Sep 20, 2026	51-200	125 contacts →
	Indirect evidence “Indicon is the leading Control System Integrator and one of the largest, most technologically advanced, UL Certified Panel Builders in the Industry.” Source: RevenueBase Database · checked Sep 20, 2026
18	Factory Automation Systems	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 20, 2026	51-200	120 contacts →
	Indirect evidence “Factory Automation Systems, Inc.” Source: RevenueBase Database · checked Sep 20, 2026
19	Kasa Companies	Indirect evidence	Salina, KS, United StatesHQ checked Sep 20, 2026	51-200	117 contacts →
	Indirect evidence “Since 1974, Kasa has been providing turnkey industrial controls and automation engineering expertise to a variety of manufacturers including the automotive, grain handling, food…” Source: RevenueBase Database · checked Sep 20, 2026
20	Horner Automation & Solutions Group	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 20, 2026	201-500	115 contacts →
	Indirect evidence “At Horner APG, we are a U.S-based global leader in automation, delivering integrated control systems that help industries operate smarter and more efficiently.” Source: RevenueBase Database · checked Sep 20, 2026
21	Premier Automation LLC	Indirect evidence	Monroeville, PA, United StatesHQ checked Sep 20, 2026	51-200	113 contacts →
	Indirect evidence “Premier Automation is an industry leading engineered solutions company focused on providing best-in-class automation, drive, robotics, electrical control solutions, panel building…” Source: RevenueBase Database · checked Sep 20, 2026
22	LIN & Associates, INC	Indirect evidence	Phoenix, TX, United StatesHQ checked Sep 20, 2026	11-50	113 contacts →
	Indirect evidence “Lin & Associates is a control system integration company with years of practical industrial experience implementing automation solutions.” Source: RevenueBase Database · checked Sep 20, 2026
23	IS International Services, LLC	Indirect evidence	Lawrenceville, GA, United StatesHQ checked Sep 20, 2026	51-200	104 contacts →
	Indirect evidence “IS International Services, LLC (IS) is a controls system integrator, providing solutions and services globally.” Source: RevenueBase Database · checked Sep 20, 2026
24	KEB America, INC	Indirect evidence	Shakopee, MN, United StatesHQ checked Sep 20, 2026	51-200	103 contacts →
	Indirect evidence “KEB America is a leading manufacturer of industrial automation products, including industrial PCs, HMIs, I/O modules, VFDs, servo and induction motors, integral gearmotors, and…” Source: RevenueBase Database · checked Sep 20, 2026
25	Suburban Enterprises, INC	Indirect evidence	Appleton, WI, United StatesHQ checked Sep 20, 2026	201-500	98 contacts →
	Indirect evidence “Founded in 1960, Suburban continues to exceed our clients’ expectations by providing industry-leading automation, electrical, fabrication and technology solutions.” Source: RevenueBase Database · checked Sep 20, 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: plc programming 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 plc programming companies.
Partial evidence: Its own public description names part of plc programming companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name plc programming 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 1,186 plc programming companies based in the United States

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Plc programming companies based in the United States at a glance

As of Sep 20, 2026

35.2%Verified-email coverage

33.7Average contacts per company

1-10Median size (employees)

2.2%Largest-city concentration · Houston

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

622

11-50

414

51-200

114

201-500

501-1,000

1,001-5,000

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 1,186 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 plc programming 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 “plc programming 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 plc programming 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 plc programming 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, 14,067 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 20, 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.

Plc programming companies by metro

Plc programming companies in Houston26

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 plc programming 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 plc programming companies are there based in the United States?

RevenueBase identified 1,186 plc programming 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?

Rockwell Automation, headquartered in Milwaukee, tops this list with the largest team on record.

Which city has the most plc programming companies?

Houston leads with 26 headquartered companies, followed by San Diego (9) and Sterling Heights (9).

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 14,067 verified decision-maker contacts tracked across these 1,186 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 20, 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.