Company lists · Data refreshed September 2026

Top 25 Industrial control systems security firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 9,011 companies tracked

RevenueBase identified 9,011 industrial control systems security firms worldwide as of September 2026 and tracks 146,212 professional contacts across them, including 43,476 with verified work emails. The United States is the largest market and London the largest hub.

This list covers industrial control systems security firms 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 systems security firms 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

9,011Companies

146,212Contacts tracked

43,476Verified emails

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The 25 largest industrial control systems security firms worldwide

Ranked by team size

Top 25 of 9,011 industrial control systems security firms 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 systems security firms: 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	Private Sector	Indirect evidence	United StatesHQ checked Sep 28, 2026	n/a	12,771 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
2	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Sep 28, 2026	5,001-10,000	4,925 contacts →
	Indirect evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 28, 2026
3	Orange Cyberdefense	Indirect evidence	Nanterre, FranceHQ checked Sep 28, 2026	1,001-5,000	3,673 contacts →
	Indirect evidence “Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.” Source: RevenueBase Database · checked Sep 28, 2026
4	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,222 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 28, 2026
5	Inspira Enterprise	Indirect evidence	Mumbai, IndiaHQ checked Sep 28, 2026	1,001-5,000	1,773 contacts →
	Indirect evidence “Inspira Enterprise is a global Cybersecurity & Data Analytics & AI services provider with a presence in North America, ASEAN, Middle East, India, and Africa regions.” Source: RevenueBase Database · checked Sep 28, 2026
6	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,232 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 28, 2026
7	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
8	Trustwave, A Levelblue Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	874 contacts →
	Indirect evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
9	Softcell Technologies Global Pvt. LTD	Partial evidence	Mumbai, IndiaHQ checked Sep 28, 2026	501-1,000	763 contacts →
	Partial evidence “With 35 years of experience, Softcell Technologies Global is a trusted IT services provider specialising in (i) IT security and cybersecurity solutions,(ii) cloud / on-premise…” Source: RevenueBase Database · checked Sep 28, 2026
10	SISA	Partial evidence	Bengaluru, IndiaHQ checked Sep 28, 2026	201-500	743 contacts →
	Partial evidence “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Source: RevenueBase Database · checked Sep 28, 2026
11	S2grupo	Indirect evidence	Valencia, SpainHQ checked Sep 28, 2026	501-1,000	683 contacts →
	Indirect evidence “We are a European company specialising in cybersecurity, cyberintelligence and cyberdefence, with more than 20 years of experience protecting critical infrastructures and…” Source: RevenueBase Database · checked Sep 28, 2026
12	I-Tracing	Indirect evidence	Courbevoie, FranceHQ checked Sep 28, 2026	1,001-5,000	639 contacts →
	Indirect evidence “I-TRACING, pure player and cybersecurity service provider leader in France, supports over 600 clients around the world in managing their cyber risks, from anticipating threats to…” Source: RevenueBase Database · checked Sep 28, 2026
13	Everfox	Indirect evidence	Herndon, United StatesHQ checked Sep 28, 2026	1,001-5,000	636 contacts →
	Indirect evidence “Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.” Source: RevenueBase Database · checked Sep 28, 2026
14	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
15	Secunet Security Networks AG	Indirect evidence	Essen, GermanyHQ checked Sep 28, 2026	1,001-5,000	623 contacts →
	Indirect evidence “secunet – We are the Guardians of Europe's Digital Freedom.” Source: RevenueBase Database · checked Sep 28, 2026
16	Advens	Indirect evidence	Paris, ItalyHQ checked Sep 28, 2026	501-1,000	586 contacts →
	Indirect evidence “Advens is a European, independent and outstanding leader in cybersecurity.” Source: RevenueBase Database · checked Sep 28, 2026
17	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
18	Group-Ib	Indirect evidence	SingaporeHQ checked Sep 28, 2026	501-1,000	528 contacts →
	Indirect evidence “Founded in 2003 and headquartered in Singapore, Group-IB is a leading creator of cybersecurity technologies to investigate, prevent, and fight digital crime.” Source: RevenueBase Database · checked Sep 28, 2026
19	Paramount Computer Systems	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 28, 2026	201-500	525 contacts →
	Indirect evidence “Protection is Paramount!” Source: RevenueBase Database · checked Sep 28, 2026
20	Ultraviolet Cyber	Partial evidence	Mclean, VA, United StatesHQ checked Sep 28, 2026	501-1,000	523 contacts →
	Partial evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: RevenueBase Database · checked Sep 28, 2026
21	own.security	Indirect evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	506 contacts →
	Indirect evidence “Founded in 2008, OWN is a Pure Player in cybersecurity, with offices in Paris, Rennes and Toulouse, but with a presence throughout France with its fully remote employees.” Source: RevenueBase Database · checked Sep 28, 2026
22	Securityhq	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	502 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 28, 2026
23	Sirar By STC	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 28, 2026	201-500	493 contacts →
	Indirect evidence “World-class leading edge cyber capabilities to enable and protect economic and physical critical infrastructure and government services.” Source: RevenueBase Database · checked Sep 28, 2026
24	Aujas Cybersecurity	Indirect evidence	Cupertino, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	473 contacts →
	Indirect evidence “At Aujas Cybersecurity, we specialize in building and transforming cybersecurity postures to help businesses effectively mitigate risks.” Source: RevenueBase Database · checked Sep 28, 2026
25	Secure Soft S.A.C	Indirect evidence	Santiago De Surco, PeruHQ checked Sep 28, 2026	51-200	426 contacts →
	Indirect evidence “Somos Secure Soft, el Centro de Excelencia en Ciberseguridad de la empresa Gtd, con más de 20 años de experiencia y presencia en Perú, Chile, Colombia, Ecuador y México.” 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 systems security firms. 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 systems security firms.
Partial evidence: Its own public description names part of industrial control systems security firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial control systems security firms. 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 9,011 industrial control systems security firms worldwide

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Industrial control systems security firms worldwide at a glance

As of Sep 28, 2026

29.7%Verified-email coverage

16.2Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

4,607

11-50

3,207

51-200

855

201-500

219

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 systems security firms, 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 systems security firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “industrial control systems security firms”. 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 systems security firms), 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 systems security firms, 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, 43,476 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 systems security firms by location

67 lists · largest first

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

Countries

Cities

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 systems security firms, 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 systems security firms are there worldwide?

RevenueBase identified 9,011 industrial control systems security firms 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?

Private Sector, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most industrial control systems security firms?

The United States leads with 2,177 companies, followed by India (773) and the United Kingdom (505). Every industrial control systems security firms list by country and city is linked on this page.

Which city has the most industrial control systems security firms?

London leads with 192 headquartered companies, followed by Dubai (98) and Sao Paulo (87).

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 43,476 verified decision-maker contacts tracked across these 9,011 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.