Company lists · Data refreshed September 2026

Top 25 Critical infrastructure protection software companies worldwide

Name: Critical infrastructure protection software companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 3,214 companies tracked

RevenueBase identified 3,214 critical infrastructure protection software companies worldwide as of September 2026 and tracks 92,415 professional contacts across them, including 35,527 with verified work emails. The United States is the largest market and London the largest hub.

This list covers critical infrastructure protection software 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 27, 2026. Country and city lists for critical infrastructure protection software 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 27, 2026 86% judged on-target in blind review

3,214Companies

92,415Contacts tracked

35,527Verified emails

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The 25 largest critical infrastructure protection software companies worldwide

Ranked by team size

Top 25 of 3,214 critical infrastructure protection software companies worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to critical infrastructure protection software 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	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 27, 2026	10001+	14,289 contacts →
	Indirect evidence “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: RevenueBase Database · checked Sep 27, 2026
2	Landis GYR	Indirect evidence	Cham, SwitzerlandHQ checked Sep 27, 2026	5,001-10,000	4,252 contacts →
	Indirect evidence “Landis+Gyr is a global energy technology leader delivering intelligent solutions that connect devices, data, and decisions across the grid.” Source: RevenueBase Database · checked Sep 27, 2026
3	Trellix	Indirect evidence	Plano, TX, United StatesHQ checked Sep 27, 2026	1,001-5,000	3,447 contacts →
	Indirect 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 27, 2026
4	Acronis	Strong evidence	Schaffhausen, SwitzerlandHQ checked Sep 27, 2026	1,001-5,000	2,083 contacts →
	Strong evidence “Acronis is a global cyber protection company delivering the only natively integrated cybersecurity, data protection, and infrastructure management platform for managed service…” Source: RevenueBase Database · checked Sep 27, 2026
5	Netscout	Indirect evidence	Westford, MA, United StatesHQ checked Sep 27, 2026	1,001-5,000	1,850 contacts →
	Indirect evidence “We provide the data that drives observability, fortifies cybersecurity, and keeps the world's most essential organizations resilient against disruptions of any kind.” Source: RevenueBase Database · checked Sep 27, 2026
6	Hansen Technologies	Partial evidence	Melbourne, AustraliaHQ checked Sep 27, 2026	1,001-5,000	1,527 contacts →
	Partial evidence “Hansen Technologies (ASX:HSN) is a global software and services provider to the energy, water/utilities and telecommunications industries.” Source: RevenueBase Database · checked Sep 27, 2026
7	PAS	Partial evidence	Houston, TX, United StatesHQ checked Sep 27, 2026	201-500	1,231 contacts →
	Partial 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 27, 2026
8	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 27, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 27, 2026
9	Opswat	Strong evidence	Tampa, FL, United StatesHQ checked Sep 27, 2026	501-1,000	1,119 contacts →
	Strong evidence “OPSWAT protects critical infrastructure.” Source: RevenueBase Database · checked Sep 27, 2026
10	SISA	Indirect evidence	Bengaluru, IndiaHQ checked Sep 27, 2026	201-500	743 contacts →
	Indirect 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 27, 2026
11	Claroty	Strong evidence	New York, NY, United StatesHQ checked Sep 27, 2026	501-1,000	725 contacts →
	Strong 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 27, 2026
12	S2grupo	Strong evidence	Valencia, SpainHQ checked Sep 27, 2026	501-1,000	683 contacts →
	Strong 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 27, 2026
13	Hytera	Indirect evidence	Shenzhen, ChinaHQ checked Sep 27, 2026	5,001-10,000	658 contacts →
	Indirect evidence “Founded in Shenzhen, China in 1993, Hytera Communications Corporation Limited (002583.SZ) is a closely-held privately-run company listed on the Shenzhen Stock Exchange.” Source: RevenueBase Database · checked Sep 27, 2026
14	Enea AB	Partial evidence	Stockholm, SwedenHQ checked Sep 27, 2026	501-1,000	638 contacts →
	Partial evidence “Enea is a global specialist in advanced telecom and cybersecurity software, with a vision to make the world’s communications safer and more efficient.” Source: RevenueBase Database · checked Sep 27, 2026
15	Everfox	Partial evidence	Herndon, United StatesHQ checked Sep 27, 2026	1,001-5,000	636 contacts →
	Partial 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 27, 2026
16	Secunet Security Networks AG	Indirect evidence	Essen, GermanyHQ checked Sep 27, 2026	1,001-5,000	623 contacts →
	Indirect evidence “secunet – We are the Guardians of Europe's Digital Freedom.” Source: RevenueBase Database · checked Sep 27, 2026
17	Kontrolmatik Technologies	Indirect evidence	Sariyer, TürkiyeHQ checked Sep 27, 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 27, 2026
18	SSH Communications Security	Partial evidence	Helsinki, FinlandHQ checked Sep 27, 2026	51-200	593 contacts →
	Partial evidence “We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive…” Source: RevenueBase Database · checked Sep 27, 2026
19	DEIF	Partial evidence	Skive, DenmarkHQ checked Sep 27, 2026	501-1,000	589 contacts →
	Partial evidence “For us, sustainable development begins with setting some of the highest standards in energy management and protection – the faster, the better.” Source: RevenueBase Database · checked Sep 27, 2026
20	Advens	Indirect evidence	Paris, ItalyHQ checked Sep 27, 2026	501-1,000	586 contacts →
	Indirect evidence “Advens is a European, independent and outstanding leader in cybersecurity.” Source: RevenueBase Database · checked Sep 27, 2026
21	Dragos, INC	Strong evidence	Hanover, MD, United StatesHQ checked Sep 27, 2026	501-1,000	551 contacts →
	Strong 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 27, 2026
22	Raycap	Partial evidence	Post Falls, ID, United StatesHQ checked Sep 27, 2026	1,001-5,000	538 contacts →
	Partial 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 27, 2026
23	Qualitrol	Indirect evidence	Fairport, NY, United StatesHQ checked Sep 27, 2026	501-1,000	494 contacts →
	Indirect evidence “Qualitrol is a global leader in electrical grid monitoring solutions for businesses that manage, operate, or support the power grid.” Source: RevenueBase Database · checked Sep 27, 2026
24	Sirar By STC	Strong evidence	Riyadh, Saudi ArabiaHQ checked Sep 27, 2026	201-500	493 contacts →
	Strong evidence “World-class leading edge cyber capabilities to enable and protect economic and physical critical infrastructure and government services.” Source: RevenueBase Database · checked Sep 27, 2026
25	MER Group	Partial evidence	Or Yehuda, IsraelHQ checked Sep 27, 2026	501-1,000	410 contacts →
	Partial evidence “A global leader in Homeland Security (HLS), Communication Infrastructure and Defense Communications, with decades of experience delivering holistic, customized solutions.” Source: RevenueBase Database · checked Sep 27, 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: critical infrastructure protection software 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 critical infrastructure protection software companies.
Partial evidence: Its own public description names part of critical infrastructure protection software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name critical infrastructure protection software 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 3,214 critical infrastructure protection software companies worldwide

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Critical infrastructure protection software companies worldwide at a glance

As of Sep 27, 2026

38.4%Verified-email coverage

28.8Average contacts per company

11-50Median size (employees)

1.4%Largest-city concentration · London

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

1,288

11-50

1,244

51-200

456

201-500

117

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 critical infrastructure protection software 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 critical infrastructure protection software companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “critical infrastructure protection software 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 critical infrastructure protection software 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 critical infrastructure protection software 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, 35,527 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 27, 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.

Critical infrastructure protection software companies by location

24 lists · largest first

Every Critical infrastructure protection software 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 critical infrastructure protection software 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 critical infrastructure protection software companies are there worldwide?

RevenueBase identified 3,214 critical infrastructure protection software 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?

Fortinet, headquartered in Sunnyvale, tops this list with the largest team on record.

Which country has the most critical infrastructure protection software companies?

The United States leads with 656 companies, followed by Brazil (171) and India (160). Every critical infrastructure protection software companies list by country and city is linked on this page.

Which city has the most critical infrastructure protection software companies?

London leads with 46 headquartered companies, followed by Sao Paulo (43) and Dubai (34).

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 35,527 verified decision-maker contacts tracked across these 3,214 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 27, 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.