Company lists · Data refreshed September 2026

Top 25 Intrusion detection software companies worldwide

Name: Intrusion detection software companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 583 companies tracked

RevenueBase identified 583 intrusion detection software companies worldwide as of September 2026 and tracks 15,245 professional contacts across them, including 5,583 with verified work emails. The United States is the largest market and London the largest hub.

This list covers intrusion detection 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 28, 2026. Country and city lists for intrusion detection 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 28, 2026 86% judged on-target in blind review

583Companies

15,245Contacts tracked

5,583Verified emails

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The 25 largest intrusion detection software companies worldwide

Ranked by team size

Top 25 of 583 intrusion detection software companies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to intrusion detection 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	Sentinelone	Indirect evidence	Mountain View, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,052 contacts →
	Indirect evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Sep 28, 2026
2	Exabeam	Indirect evidence	Broomfield, CO, United StatesHQ checked Sep 28, 2026	501-1,000	876 contacts →
	Indirect evidence “Exabeam is the leader in Behavior Intelligence for the agentic enterprise.” Source: RevenueBase Database · checked Sep 28, 2026
3	Guidance Software	Indirect evidence	Pasadena, CA, United StatesHQ checked Sep 28, 2026	501-1,000	492 contacts →
	Indirect evidence “Guidance (NASDAQ: GUID) exists to turn chaos and the unknown into order and the known-so that companies and their customers can go about their daily lives as usual without worry…” Source: RevenueBase Database · checked Sep 28, 2026
4	Gurucul	Indirect evidence	El Segundo, CA, United StatesHQ checked Sep 28, 2026	201-500	325 contacts →
	Indirect evidence “Gurucul is a security analytics company founded in data science that delivers radical clarity about cyber risk.” Source: RevenueBase Database · checked Sep 28, 2026
5	ONTIC	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	201-500	317 contacts →
	Indirect evidence “At Ontic, you’ll join a team driven by collaboration, innovation, and a shared sense of purpose.” Source: RevenueBase Database · checked Sep 28, 2026
6	Niksun	Indirect evidence	Princeton, NJ, United StatesHQ checked Sep 28, 2026	201-500	276 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 28, 2026
7	Sits Group	Indirect evidence	Wettingen, SwitzerlandHQ checked Sep 28, 2026	501-1,000	269 contacts →
	Indirect evidence “As a leading IT security enterprise, the SITS Group stands for end-to-end security.” Source: RevenueBase Database · checked Sep 28, 2026
8	Hirsch USA	Strong evidence	Santa Ana, CA, United StatesHQ checked Sep 28, 2026	201-500	240 contacts →
	Strong evidence “Hirsch is a global leader in unified security solutions, helping enterprise and SMB organisations integrate perimeter security, intrusion detection, access control, video…” Source: RevenueBase Database · checked Sep 28, 2026
9	Fox-It	Indirect evidence	Rijswijk, NetherlandsHQ checked Sep 28, 2026	201-500	233 contacts →
	Indirect evidence “Fox-IT prevents, solves and mitigates the most serious cyber threats with innovative solutions for government, defense, law enforcement, critical infrastructure, banking, and…” Source: RevenueBase Database · checked Sep 28, 2026
10	Logpoint	Indirect evidence	Copenhagen, DenmarkHQ checked Sep 28, 2026	201-500	218 contacts →
	Indirect evidence “Logpoint safeguards society in a digital world by helping customers and Managed Security Service Providers (MSSPs) detect cyberattacks.” Source: RevenueBase Database · checked Sep 28, 2026
11	Stone Security, A Bearcom Company	Partial evidence	Salt Lake City, UT, United StatesHQ checked Sep 28, 2026	201-500	202 contacts →
	Partial 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
12	D3 Security	Indirect evidence	Vancouver, BC, CanadaHQ checked Sep 28, 2026	51-200	194 contacts →
	Indirect evidence “D3 Security's Morpheus is the autonomous security operations platform for busy teams defending multi-vendor environments.” Source: RevenueBase Database · checked Sep 28, 2026
13	Netwitness	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	191 contacts →
	Partial evidence “NetWitness provides comprehensive and highly scalable threat detection and response capabilities for organizations around the world.” Source: RevenueBase Database · checked Sep 28, 2026
14	Tehtris	Partial evidence	Pessac, FranceHQ checked Sep 28, 2026	201-500	185 contacts →
	Partial evidence “TEHTRIS is the software editor of the TEHTRIS XDR Platform, the world leader in automatic, real-time, non-human neutralization of cyber attacks.” Source: RevenueBase Database · checked Sep 28, 2026
15	Defendedge	Indirect evidence	Elmhurst, IL, United StatesHQ checked Sep 28, 2026	51-200	167 contacts →
	Indirect evidence “DefendEdge is a leading US-based cybersecurity firm specializing in protecting clients' firewalls, endpoints, and applications against cyber threats and vulnerabilities.” Source: RevenueBase Database · checked Sep 28, 2026
16	Cyberoo	Indirect evidence	Reggio Nell'emilia, ItalyHQ checked Sep 28, 2026	51-200	154 contacts →
	Indirect evidence “CYBEROO is the European cybersecurity company that helps businesses manage cyber risk in a continuous, integrated and measurable way.” Source: RevenueBase Database · checked Sep 28, 2026
17	Fidelis Security	Indirect evidence	Riverside, CA, United StatesHQ checked Sep 28, 2026	51-200	147 contacts →
	Indirect evidence “Fidelis Security® is the industry innovator in proactive cyber defense, safeguarding modern IT for global enterprises with proactive XDR and CNAPP platforms.” Source: RevenueBase Database · checked Sep 28, 2026
18	Gatewatcher	Strong evidence	Paris, FranceHQ checked Sep 28, 2026	51-200	138 contacts →
	Strong evidence “European leader in intrusion detection and advanced threat detection, Gatewatcher has been protecting the critical networks of large companies as well as public institutions since…” Source: RevenueBase Database · checked Sep 28, 2026
19	Sekoia	Indirect evidence	Rennes, FranceHQ checked Sep 28, 2026	51-200	134 contacts →
	Indirect evidence “Sekoia is the European agentic cybersecurity company building the Cyber Operations Platform for the AI era.” Source: RevenueBase Database · checked Sep 28, 2026
20	Stellar Cyber	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	51-200	133 contacts →
	Indirect evidence “By shining a bright light on the darkest corners of security operations, Stellar Cyber empowers organizations to see incoming attacks, know how to fight them, and act decisively –…” Source: RevenueBase Database · checked Sep 28, 2026
21	A3sec	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	51-200	124 contacts →
	Indirect evidence “Empresa de Ciberseguridad soportada en Datos.” Source: RevenueBase Database · checked Sep 28, 2026
22	Vairav Tech	Indirect evidence	Kathmandu, NepalHQ checked Sep 28, 2026	201-500	121 contacts →
	Indirect evidence “Vairav Technology is a dedicated Cyber Defender, delivering cutting-edge solutions that proactively monitor, detect, and neutralize cyber threats in real-time.” Source: RevenueBase Database · checked Sep 28, 2026
23	sorint.sec	Indirect evidence	Osio Sotto, ItalyHQ checked Sep 28, 2026	1,001-5,000	112 contacts →
	Indirect evidence “Sorint.SEC is The CyberSecurity Company of the Global ICT Service Provider Sorint.LAB.” Source: RevenueBase Database · checked Sep 28, 2026
24	Cy4gate	Indirect evidence	Roma, ItalyHQ checked Sep 28, 2026	51-200	111 contacts →
	Indirect evidence “CY4GATE nasce nel 2014 con il compito di rispondere ad una domanda di sicurezza cibernetica non convenzionale.” Source: RevenueBase Database · checked Sep 28, 2026
25	Centripetal	Indirect evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	51-200	103 contacts →
	Indirect evidence “We stand in the breach so you don’t have to.” 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: intrusion detection 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 intrusion detection software companies.
Partial evidence: Its own public description names part of intrusion detection software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name intrusion detection 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 583 intrusion detection software companies worldwide

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Intrusion detection software companies worldwide at a glance

As of Sep 28, 2026

36.6%Verified-email coverage

26.1Average contacts per company

11-50Median size (employees)

1.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

217

11-50

223

51-200

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 intrusion detection 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 intrusion detection software companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “intrusion detection 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 intrusion detection 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 intrusion detection 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, 5,583 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.

Intrusion detection software companies by location

1 lists · largest first

Every Intrusion detection software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Intrusion detection software companies based in the United States187

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 intrusion detection 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 intrusion detection software companies are there worldwide?

RevenueBase identified 583 intrusion detection 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?

Sentinelone, headquartered in Mountain View, tops this list with the largest team on record.

Which country has the most intrusion detection software companies?

The United States leads with 187 companies. Every intrusion detection software companies list by country and city is linked on this page.

Which city has the most intrusion detection software companies?

London leads with 11 headquartered companies, followed by Paris (8) and Austin (7).

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 5,583 verified decision-maker contacts tracked across these 583 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.