Company lists · Data refreshed September 2026

Top 25 Industrial control system security based in the United States

Name: Industrial control system security based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 632 companies tracked

RevenueBase identified 632 industrial control system security headquartered in the United States as of September 2026 and tracks 16,041 professional contacts across them, including 7,068 with verified work emails and 5,399 with mobile numbers. Houston is the largest hub.

This list covers industrial control system security 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 3, 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 3, 2026 86% judged on-target in blind review

632Companies

16,041Contacts tracked

7,068Verified emails

5,399Mobile numbers

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The 25 largest industrial control system security based in the United States

Ranked by team size

Top 25 of 632 industrial control system security based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. RevenueBase Smart Search rates how each company's information relates to industrial control system security: 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	Trellix	Partial evidence	Plano, TX, United StatesHQ checked Sep 3, 2026	1,001-5,000	3,490 contacts →
	Partial evidence “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Source: RevenueBase Database · checked Sep 3, 2026
2	Guidepoint Security	Partial evidence	Reston, FL, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,234 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 3, 2026
3	PAS	Indirect evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	201-500	1,227 contacts →
	Indirect evidence “PAS, part of Hexagon's Asset Lifecycle Intelligence division, delivers software solutions that prevent, detect, & remediate cyber threats, reduce process safety risks, and…” Source: RevenueBase Database · checked Sep 3, 2026
4	Forescout Technologies INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	1,165 contacts →
	Indirect evidence “As AI-driven vulnerability and exploitation accelerate attack velocity to machine speed, Forescout is a foundational cyber defense layer that allows organizations to segment and…” Source: RevenueBase Database · checked Sep 3, 2026
5	Dragos, INC	Partial evidence	Hanover, TX, United StatesHQ checked Sep 3, 2026	501-1,000	544 contacts →
	Partial evidence “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Source: RevenueBase Database · checked Sep 3, 2026
6	Niksun	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 3, 2026	201-500	274 contacts →
	Indirect evidence “In the ever-growing world of Cloud Computing, Big Data and the Internet of Things, NIKSUN® is the industry leader in making the unknown known.” Source: RevenueBase Database · checked Sep 3, 2026
7	Hillstone Networks	Strong evidence	Santa Clara, CA, United StatesHQ checked Sep 3, 2026	1,001-5,000	231 contacts →
	Strong evidence “Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Source: RevenueBase Database · checked Sep 3, 2026
8	Stone Security, A Bearcom Company	Strong evidence	Salt Lake City, CO, United StatesHQ checked Sep 3, 2026	201-500	199 contacts →
	Strong evidence “Stone Security has been driving the implementation of network-based surveillance, access control and intrusion systems for over 15 years.” Source: RevenueBase Database · checked Sep 3, 2026
9	Nextgen Security	Strong evidence	Exton, TX, United StatesHQ checked Sep 3, 2026	201-500	185 contacts →
	Strong evidence “NextGen Security is a security systems integrator that offers industrial companies best in class industry knowledge, engineering design, implementation, management and on-going…” Source: RevenueBase Database · checked Sep 3, 2026
10	Deepseas	Indirect evidence	United StatesHQ checked Sep 3, 2026	201-500	185 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” Source: RevenueBase Database · checked Sep 3, 2026
11	RMC Global	Strong evidence	Arlington, VA, United StatesHQ checked Sep 3, 2026	51-200	167 contacts →
	Strong evidence “We believe resilience depends on minimizing and managing the increasing risks facing the critical infrastructure and industrial systems that support our country, companies, and…” Source: RevenueBase Database · checked Sep 3, 2026
12	At&t Cybersecurity	Partial evidence	Dallas, TX, United StatesHQ checked Sep 3, 2026	1,001-5,000	158 contacts →
	Partial evidence “AT & T Cybersecurity’s Edge-to-Edge technologies provide phenomenal threat intelligence, collaborative defense, security without the seams, and solutions that fit your business.” Source: RevenueBase Database · checked Sep 3, 2026
13	Nuharbor Security	Partial evidence	Colchester, MA, United StatesHQ checked Sep 3, 2026	51-200	149 contacts →
	Partial evidence “NuHarbor Security is a leading national cybersecurity services firm, supporting the diverse needs of hundreds of clients with clear, comprehensive, and outcome-based solutions.” Source: RevenueBase Database · checked Sep 3, 2026
14	Shift5	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 3, 2026	51-200	137 contacts →
	Indirect evidence “Former military officers who stood up U.S.” Source: RevenueBase Database · checked Sep 3, 2026
15	Helpsystems	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 3, 2026	1,001-5,000	132 contacts →
	Indirect evidence “HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: RevenueBase Database · checked Sep 3, 2026
16	Quad Plus	Strong evidence	New Lenox, IN, United StatesHQ checked Sep 3, 2026	201-500	129 contacts →
	Strong evidence “Single Source for Integrated Systems Quad Plus provides industrial control systems, solutions, and services to a variety of industries.” Source: RevenueBase Database · checked Sep 3, 2026
17	Tripwire	Indirect evidence	Portland, OR, United StatesHQ checked Sep 3, 2026	201-500	127 contacts →
	Indirect evidence “Tripwire is proud to be part of Fortra’s comprehensive cybersecurity portfolio.” Source: RevenueBase Database · checked Sep 3, 2026
18	CNF Technologies	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 3, 2026	51-200	120 contacts →
	Indirect evidence “CNF is a top cybersecurity provider in San Antonio Texas.” Source: RevenueBase Database · checked Sep 3, 2026
19	Sealing Technologies, A Parsons Company	Partial evidence	Columbia, MD, United StatesHQ checked Sep 3, 2026	51-200	119 contacts →
	Partial evidence “SealingTech, a Parsons Company, rapidly delivers innovative, agile cybersecurity solutions that modernize, protect, and defend the networks and systems of the federal government…” Source: RevenueBase Database · checked Sep 3, 2026
20	Foxguard	Partial evidence	Christiansburg, VA, United StatesHQ checked Sep 3, 2026	51-200	115 contacts →
	Partial evidence “Foxguard delivers comprehensive OT Cyber Security and Compute Solutions tailored to meet the unique needs of critical infrastructures.” Source: RevenueBase Database · checked Sep 3, 2026
21	Directdefense	Partial evidence	Denver, CO, United StatesHQ checked Sep 3, 2026	51-200	112 contacts →
	Partial evidence “DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Source: RevenueBase Database · checked Sep 3, 2026
22	Shorepoint INC	Indirect evidence	Washington, DC, United StatesHQ checked Sep 3, 2026	n/a	107 contacts →
	Indirect evidence “ShorePoint recognizes that cybersecurity is the challenge of our generation.” Source: RevenueBase Database · checked Sep 3, 2026
23	Morphisec	Indirect evidence	New York, NY, United StatesHQ checked Sep 3, 2026	51-200	103 contacts →
	Indirect evidence “We empower organizations with resilient, self-healing capabilities that prevent and neutralize even the most advanced cyber threats.” Source: RevenueBase Database · checked Sep 3, 2026
24	Everline	Strong evidence	Houston, TX, United StatesHQ checked Sep 3, 2026	201-500	101 contacts →
	Strong evidence “EverLine provides fully-integrated compliance, SCADA/IT, control room and security services to more than 200 customers nationwide through a unique Technical Stack.” Source: RevenueBase Database · checked Sep 3, 2026
25	Trustedsec	Partial evidence	Fairlawn, OH, United StatesHQ checked Sep 3, 2026	51-200	100 contacts →
	Partial evidence “TrustedSec is an end-to-end security consulting company that provides customized services to build client-defined success.” Source: RevenueBase Database · checked Sep 3, 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: industrial control system security. 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 industrial control system security.
Partial evidence: Its own public description names part of industrial control system security, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial control system security. 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 632 industrial control system security based in the United States

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Industrial control system security based in the United States at a glance

As of Sep 3, 2026

44.1%Verified-email coverage

33.7%Mobile-number coverage

25.4Average contacts per company

11-50Median size (employees)

4.0%Largest-city concentration · Houston

Sep 3, 2026Page data refreshed

Companies by employee count

1-10

295

11-50

229

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

62731–60

4,05761–90

2,32890–180

56180+

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 industrial control system security, 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 “industrial control system security”. 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 industrial control system security), 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 industrial control system security, 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, 7,068 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 3, 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.

Industrial control system security by metro

Industrial control system security in Houston25

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 industrial control system security, 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 industrial control system security are there based in the United States?

RevenueBase identified 632 industrial control system security 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?

Trellix, headquartered in Plano, tops this list with the largest team on record.

Which city has the most industrial control system security?

Houston leads with 25 headquartered companies, followed by Austin (15) and New York (15).

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 7,068 verified decision-maker contacts tracked across these 632 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 3, 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.