Company lists · Data refreshed September 2026

Top 25 Industrial control system security manufacturers worldwide

Name: Industrial control system security manufacturers worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 926 companies tracked

RevenueBase identified 926 industrial control system security manufacturers worldwide as of September 2026 and tracks 17,511 professional contacts across them, including 5,309 with verified work emails. The United States is the largest market and London the largest hub.

This list covers industrial control system security manufacturers worldwide, 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 28, 2026. Country and city lists for industrial control system security manufacturers follow the table.

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 28, 2026 86% judged on-target in blind review

926Companies

17,511Contacts tracked

5,309Verified emails

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The 25 largest industrial control system security manufacturers worldwide

Ranked by team size

Top 25 of 926 industrial control system security manufacturers worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to industrial control system security manufacturers: 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	PAS	Indirect evidence	Houston, TX, United StatesHQ checked Sep 28, 2026	201-500	1,231 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 28, 2026
2	Opswat	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 28, 2026	501-1,000	1,119 contacts →
	Indirect evidence “OPSWAT protects critical infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
3	Claroty	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	725 contacts →
	Partial evidence “Claroty has redefined cyber-physical systems (CPS) protection with an unrivaled industry-centric platform built to secure mission-critical infrastructure.” Source: RevenueBase Database · checked Sep 28, 2026
4	Nvent Hoffman	Strong evidence	Anoka, MN, United StatesHQ checked Sep 28, 2026	10001+	627 contacts →
	Strong evidence “nVent HOFFMAN leading designer and manufacturer of systems that safely and reliably protect the electronic controls and mission critical electrical systems in industrial, data…” Source: RevenueBase Database · checked Sep 28, 2026
5	Dragos, INC	Partial evidence	Hanover, MD, United StatesHQ checked Sep 28, 2026	501-1,000	551 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 28, 2026
6	G Data Cyberdefense	Partial evidence	Bochum, GermanyHQ checked Sep 28, 2026	501-1,000	386 contacts →
	Partial evidence “Progress is our motivation because we are convinced that it will lead us to a successful future – independent of industries, companies and social classes.” Source: RevenueBase Database · checked Sep 28, 2026
7	Infopercept	Partial evidence	Ahmedabad, IndiaHQ checked Sep 28, 2026	201-500	304 contacts →
	Partial evidence “Infopercept is a global cybersecurity company dedicated to transforming how organizations perceive and implement security.” Source: RevenueBase Database · checked Sep 28, 2026
8	RED Lion By HMS Networks	Partial evidence	York, PA, United StatesHQ checked Sep 28, 2026	201-500	282 contacts →
	Partial evidence “Under the Red Lion brand, HMS offers secure, scalable data access and control from edge to cloud.” Source: RevenueBase Database · checked Sep 28, 2026
9	Sits Group	Partial evidence	Wettingen, SwitzerlandHQ checked Sep 28, 2026	501-1,000	269 contacts →
	Partial evidence “As a leading IT security enterprise, the SITS Group stands for end-to-end security.” Source: RevenueBase Database · checked Sep 28, 2026
10	Wittenbach	Strong evidence	Sparks, MD, United StatesHQ checked Sep 28, 2026	201-500	244 contacts →
	Strong evidence “For over 50 years, Wittenbach has been a trusted leader in advanced security solutions in financial and commercial industries.” Source: RevenueBase Database · checked Sep 28, 2026
11	ANG India LTD	Strong evidence	Noida, IndiaHQ checked Sep 28, 2026	201-500	210 contacts →
	Strong evidence “A’nG INDIA specializes in Security surveillance, Fire Detection and CCTV products with system design and custom engineering being a major strength.” Source: RevenueBase Database · checked Sep 28, 2026
12	Stone Security, A Bearcom Company	Strong evidence	Salt Lake City, UT, United StatesHQ checked Sep 28, 2026	201-500	202 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 28, 2026
13	Nextgen Security	Strong evidence	Exton, PA, United StatesHQ checked Sep 28, 2026	201-500	188 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 28, 2026
14	Vertech	Strong evidence	Phoenix, AZ, United StatesHQ checked Sep 28, 2026	201-500	175 contacts →
	Strong evidence “Vertech is an industrial control systems integration firm providing a complete range of engineering and technical services.” Source: RevenueBase Database · checked Sep 28, 2026
15	HWG Sababa	Partial evidence	Milan, ItalyHQ checked Sep 28, 2026	201-500	153 contacts →
	Partial evidence “From the merger of HWG srl and Sababa Security, HWG Sababa offers a complete suite of customized security solutions.” Source: RevenueBase Database · checked Sep 28, 2026
16	Netsecurity	Partial evidence	Oslo, NorwayHQ checked Sep 28, 2026	51-200	138 contacts →
	Partial evidence “Netsecurity is a dedicated cyber security company that helps companies before, during and after an attack.” Source: RevenueBase Database · checked Sep 28, 2026
17	Quad Plus	Strong evidence	New Lenox, IL, United StatesHQ checked Sep 28, 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 28, 2026
18	Waterfall Security Solutions	Indirect evidence	Rosh Haayin, IsraelHQ checked Sep 28, 2026	51-200	126 contacts →
	Indirect evidence “Through our software-enabled hardware platforms, we enable secure and reliable operations, protecting against both today’s cybersecurity challenges and those yet to come.” Source: RevenueBase Database · checked Sep 28, 2026
19	Opto 22	Partial evidence	Temecula, CA, United StatesHQ checked Sep 28, 2026	201-500	117 contacts →
	Partial evidence “For 50 years, OEMs, machine builders, system integrators, and IT and operations personnel have looked to Opto 22 for innovative automation products at an affordable price.” Source: RevenueBase Database · checked Sep 28, 2026
20	Clavister	Indirect evidence	Örnsköldsvik, SwedenHQ checked Sep 28, 2026	51-200	116 contacts →
	Indirect evidence “Clavister is a Swedish cybersecurity company protecting organisations with mission-critical applications for over two decades.” Source: RevenueBase Database · checked Sep 28, 2026
21	Foxguard	Partial evidence	Christiansburg, VA, United StatesHQ checked Sep 28, 2026	51-200	116 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 28, 2026
22	IDS	Indirect evidence	New Germany, South AfricaHQ checked Sep 28, 2026	51-200	112 contacts →
	Indirect evidence “We live in an increasingly volatile, uncertain and chaotic world characterised by ambiguity and constant change.” Source: RevenueBase Database · checked Sep 28, 2026
23	Rohde & Schwarz Cybersecurity	Partial evidence	Munich, GermanyHQ checked Sep 28, 2026	201-500	96 contacts →
	Partial evidence “Rohde & Schwarz Cybersecurity is a leading IT security company that protects companies and public institutions around the world against cyberattacks.” Source: RevenueBase Database · checked Sep 28, 2026
24	Nomios Uk&i	Indirect evidence	Basingstoke, United StatesHQ checked Sep 28, 2026	51-200	94 contacts →
	Indirect evidence “Nomios UK & I delivers advanced cybersecurity, networking, and managed services that help organisations protect critical assets, optimise performance, and accelerate business…” Source: RevenueBase Database · checked Sep 28, 2026
25	Titania LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	88 contacts →
	Partial evidence “Dedicated to securing the networks society depends on.” Source: RevenueBase Database · checked Sep 28, 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 manufacturers. 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 manufacturers.
Partial evidence: Its own public description names part of industrial control system security manufacturers, 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 manufacturers. 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 926 industrial control system security manufacturers worldwide

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Industrial control system security manufacturers worldwide at a glance

As of Sep 28, 2026

30.3%Verified-email coverage

18.9Average contacts per company

11-50Median size (employees)

1.7%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

389

11-50

346

51-200

134

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 manufacturers, 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.
Coverage: Every country. Country and city lists for industrial control system security manufacturers are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “industrial control system security manufacturers”. 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 manufacturers), 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 manufacturers, and records with no verified work email.
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, 5,309 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 28, 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 manufacturers by location

7 lists · largest first

Every Industrial control system security manufacturers list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 manufacturers, 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 manufacturers are there worldwide?

RevenueBase identified 926 industrial control system security manufacturers worldwide 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?

PAS, headquartered in Houston, tops this list with the largest team on record.

Which country has the most industrial control system security manufacturers?

The United States leads with 193 companies, followed by India (53) and the United Kingdom (44). Every industrial control system security manufacturers list by country and city is linked on this page.

Which city has the most industrial control system security manufacturers?

London leads with 16 headquartered companies, followed by Dubai (11) and Houston (11).

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 5,309 verified decision-maker contacts tracked across these 926 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 28, 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.