Company lists · Data refreshed September 2026

Top 25 IT ot convergence security companies worldwide

Name: IT ot convergence security companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 5,357 companies tracked

RevenueBase identified 5,357 IT ot convergence security companies worldwide as of September 2026 and tracks 95,616 professional contacts across them, including 28,808 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers IT ot convergence security companies 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 IT ot convergence security companies 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

5,357Companies

95,616Contacts tracked

28,808Verified emails

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The 25 largest IT ot convergence security companies worldwide

Ranked by team size

Top 25 of 5,357 IT ot convergence security companies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to IT ot convergence security 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	Axis Communications	Partial evidence	Lund, SwedenHQ checked Sep 28, 2026	1,001-5,000	4,850 contacts →
	Partial evidence “Axis enables a smarter and safer world by creating solutions for improving security and business performance.” Source: RevenueBase Database · checked Sep 28, 2026
2	Infoblox	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,813 contacts →
	Partial evidence “Infoblox unites networking and security to deliver unmatched performance and protection.” Source: RevenueBase Database · checked Sep 28, 2026
3	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
4	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 28, 2026
5	Forescout Technologies INC	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,181 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 28, 2026
6	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
7	Security 101	Partial evidence	West Palm Beach, FL, United StatesHQ checked Sep 28, 2026	501-1,000	849 contacts →
	Partial evidence “Security 101® is a nationwide leader in designing, installing, and maintaining advanced security systems tailored to the unique needs of organizations of all sizes.” Source: RevenueBase Database · checked Sep 28, 2026
8	Securitas Norge	Partial evidence	Oslo, NorwayHQ checked Sep 28, 2026	5,001-10,000	792 contacts →
	Partial evidence “Securitas AS er det største og eldste sikkerhetsselskapet i Norge.” Source: RevenueBase Database · checked Sep 28, 2026
9	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
10	Claroty	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	501-1,000	725 contacts →
	Indirect 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
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	Halogen Group	Partial evidence	Lagos, NigeriaHQ checked Sep 28, 2026	501-1,000	642 contacts →
	Partial evidence “Halogen Group formerly known as Halogen Security Company Limited is the leading Security Solutions Provider in West Africa.” Source: RevenueBase Database · checked Sep 28, 2026
13	Nvent Hoffman	Indirect evidence	Anoka, MN, United StatesHQ checked Sep 28, 2026	10001+	627 contacts →
	Indirect 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
14	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
15	Grupo Khronos	Indirect evidence	São José, BrazilHQ checked Sep 28, 2026	1,001-5,000	617 contacts →
	Indirect evidence “O Grupo Khronos é referência nacional em soluções integradas de segurança, tecnologia e IoT.” Source: RevenueBase Database · checked Sep 28, 2026
16	Kontrolmatik Technologies	Indirect evidence	Sariyer, TürkiyeHQ checked Sep 28, 2026	1,001-5,000	602 contacts →
	Indirect evidence “Kontrolmatik provides a broad spectrum of services to industries including- LV/MV/HV Solutions- SCADA and Automation- Communication- Balance of Plant- Consulting- ICS…” Source: RevenueBase Database · checked Sep 28, 2026
17	Pavion	Partial evidence	Chantilly, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	558 contacts →
	Partial evidence “Pavion Connects and Protects by providing Fire, Security, and Integration solutions to customers.” Source: RevenueBase Database · checked Sep 28, 2026
18	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
19	Raycap	Indirect evidence	Post Falls, ID, United StatesHQ checked Sep 28, 2026	1,001-5,000	538 contacts →
	Indirect evidence “Raycap is a privately-held technology solutions provider offering products and services that support and protect the world’s critical telecommunications, energy, transportation…” Source: RevenueBase Database · checked Sep 28, 2026
20	Tech Systems Inc. TSI	Indirect evidence	Buford, GA, IndiaHQ checked Sep 28, 2026	501-1,000	527 contacts →
	Indirect evidence “Since 1987, Tech Systems, Inc.” Source: RevenueBase Database · checked Sep 28, 2026
21	Eryma Security Systems	Indirect evidence	Issy-les-moulineaux, FranceHQ checked Sep 28, 2026	201-500	457 contacts →
	Indirect evidence “En tant qu’intégrateur ouvert de solutions de sûreté électroniques, nous vous accompagnons dans la protection de vos biens et personnes.” Source: RevenueBase Database · checked Sep 28, 2026
22	Equans Digital	Strong evidence	Courbevoie, FranceHQ checked Sep 28, 2026	5,001-10,000	393 contacts →
	Strong evidence “Equans Digital connects OT, IT and data to make your infrastructures truly controllable.” Source: RevenueBase Database · checked Sep 28, 2026
23	PT Itsec Asia TBK	Indirect evidence	Jakarta, IndonesiaHQ checked Sep 28, 2026	201-500	388 contacts →
	Indirect evidence “ITSEC Asia is a leading cybersecurity company in Indonesia, listed on the Indonesian Stock Exchange (“CYBR”), with over 400 employees across five countries.” Source: RevenueBase Database · checked Sep 28, 2026
24	Nozomi Networks	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	201-500	375 contacts →
	Indirect evidence “We protect the world’s critical infrastructure from cyber threats.” Source: RevenueBase Database · checked Sep 28, 2026
25	Telefónica Ingeniería DE Seguridad	Indirect evidence	Lima, PeruHQ checked Sep 28, 2026	201-500	349 contacts →
	Indirect evidence “Somos la compañía del Grupo Telefónica pionera en seguridad tecnológica integral.” 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: IT ot convergence security 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 IT ot convergence security companies.
Partial evidence: Its own public description names part of IT ot convergence security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT ot convergence security 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 5,357 IT ot convergence security companies worldwide

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IT ot convergence security companies worldwide at a glance

As of Sep 28, 2026

30.1%Verified-email coverage

17.8Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

2,139

11-50

2,152

51-200

710

201-500

196

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 IT ot convergence security 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.
Coverage: Every country. Country and city lists for IT ot convergence security companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “IT ot convergence security 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 IT ot convergence security 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 IT ot convergence security companies, 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, 28,808 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.

IT ot convergence security companies by location

31 lists · largest first

Every IT ot convergence security companies 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 IT ot convergence security 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 IT ot convergence security companies are there worldwide?

RevenueBase identified 5,357 IT ot convergence security companies 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?

Axis Communications, headquartered in Lund, tops this list with the largest team on record.

Which country has the most IT ot convergence security companies?

The United States leads with 968 companies, followed by India (326) and Brazil (313). Every IT ot convergence security companies list by country and city is linked on this page.

Which city has the most IT ot convergence security companies?

Sao Paulo leads with 70 headquartered companies, followed by London (69) and Dubai (49).

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 28,808 verified decision-maker contacts tracked across these 5,357 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.