Company lists · Data refreshed September 2026

Top 25 IT security monitoring services worldwide

Name: IT security monitoring services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 12,963 companies tracked

RevenueBase identified 12,963 company matches for IT security monitoring services worldwide as of September 2026 and tracks 172,228 professional contacts across them, including 47,410 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for IT security monitoring services worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 21, 2026. Country and city lists for IT security monitoring services follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 21, 2026 How this list was built

12,963Companies

172,228Contacts tracked

47,410Verified emails

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The 25 largest IT security monitoring services worldwide

Ranked by team size

Top 25 of 12,963 company matches for IT security monitoring services worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Private Sector	Exact match	United StatesHQ recorded Sep 21, 2026	n/a	12,771 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Arctic Wolf	Exact match	Eden Prairie, MN, United StatesHQ recorded Sep 21, 2026	1,001-5,000	3,145 contacts →
	Exact match “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Qualys	Exact match	Foster City, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	3,058 contacts →
	Exact match “Qualys, Inc.(NASDAQ: QLYS) is a leading provider of disruptive cloud-based security, compliance and IT solutions with more than subscription customers worldwide, including a…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Sentinelone	Exact match	Mountain View, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	3,052 contacts →
	Exact match “SentinelOne is the world's leading AI-powered cybersecurity platform.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,232 contacts →
	Exact match “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Onet Sécurité	Exact match	Marseille, FranceHQ recorded Sep 21, 2026	10001+	1,007 contacts →
	Exact match “La proposition de valeur d'Onet dans la sécurité se fonde sur - son expertise sécurité et sa capacité à analyser les besoins et risques propres à ses clients- sa parfaite maîtrise…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Terrier Security Services	Exact match	Bangalore, IndiaHQ recorded Sep 21, 2026	10001+	937 contacts →
	Exact match “Founded in 1989, Terrier Security Services is a leading integrated security provider in India, with over guards and 2,480 secured sites.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Zerofox	Exact match	Baltimore, MD, United StatesHQ recorded Sep 21, 2026	501-1,000	904 contacts →
	Exact match “ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	501-1,000	874 contacts →
	Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Cyderes	Exact match	Kansas City, MO, United StatesHQ recorded Sep 21, 2026	1,001-5,000	844 contacts →
	Exact match “Today’s threatscape is relentless.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Securitas Electronic Security, INC	Exact match	Uniontown, OH, United StatesHQ recorded Sep 21, 2026	10001+	839 contacts →
	Exact match “Securitas knows Security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	SISA	Exact match	Bengaluru, IndiaHQ recorded Sep 21, 2026	201-500	743 contacts →
	Exact match “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	COBRA	Exact match	London, United KingdomHQ recorded Sep 21, 2026	n/a	705 contacts →
	Exact match “Get a free, powerful security assessment with personalised recommendations, the same analysis that costs from IT Consultancies.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Pro-Vigil Surveillance Services	Exact match	San Antonio, TX, United StatesHQ recorded Sep 21, 2026	201-500	702 contacts →
	Exact match “Pro-Vigil is the smartest, fastest, most reliable, surveillance and monitoring solution, to enable you to focus on your core business, whether that’s in construction, an auto…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Huntress	Exact match	Columbia, MD, United StatesHQ recorded Sep 21, 2026	501-1,000	696 contacts →
	Exact match “Protect Your Endpoints, Identities, Logs, and Employees.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Sabico Seguridad	Exact match	SpainHQ recorded Sep 21, 2026	1,001-5,000	659 contacts →
	Exact match “comienzos de 1989 se funda SABICO SEGURIDAD S.A, estando inscrita en el Registro de Empresas de Seguridad con el nº 1731.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Esentire	Exact match	Waterloo, ON, CanadaHQ recorded Sep 21, 2026	501-1,000	649 contacts →
	Exact match “eSentire is a leader in Controlled Autonomy SecOps, protecting organizations across 35+ industries around the world.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Network Intelligence	Exact match	Plano, TX, United StatesHQ recorded Sep 21, 2026	501-1,000	641 contacts →
	Exact match “At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	I-Tracing	Exact match	Courbevoie, FranceHQ recorded Sep 21, 2026	1,001-5,000	639 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Vikingcloud	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	1,001-5,000	628 contacts →
	Exact match “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Advens	Exact match	Paris, ItalyHQ recorded Sep 21, 2026	501-1,000	586 contacts →
	Exact match “Advens is a European, independent and outstanding leader in cybersecurity.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Interface Systems	Exact match	St Louis, MO, United StatesHQ recorded Sep 21, 2026	501-1,000	569 contacts →
	Exact match “Interface Systems combines AI-powered technologies with expert remote video monitoring from its US-based Interactive Security Operations Centers (iSOCs).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Lucidity Cloud Services	Exact match	Auckland, New ZealandHQ recorded Sep 21, 2026	n/a	545 contacts →
	Exact match “Managing IT systems can be complex and time-consuming, with security risks, outdated infrastructure, and inefficient processes holding your business back.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Group-Ib	Exact match	SingaporeHQ recorded Sep 21, 2026	501-1,000	528 contacts →
	Exact match “Founded in 2003 and headquartered in Singapore, Group-IB is a leading creator of cybersecurity technologies to investigate, prevent, and fight digital crime.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Ultraviolet Cyber	Exact match	Mclean, VA, United StatesHQ recorded Sep 21, 2026	501-1,000	523 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “IT security monitoring services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 12,963 IT security monitoring services worldwide

See the full list, filter by size, metro and specialty, and access 47,410 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT security monitoring services worldwide at a glance

As of Sep 21, 2026

27.5%Verified-email coverage

13.3Average contacts per company

1-10Median size (employees)

1.8%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

6,819

11-50

4,401

51-200

1,220

201-500

295

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

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for IT security monitoring services are linked below.
What qualifies: Company records worldwide whose business descriptions match “IT security monitoring services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 47,410 professional contacts with verified work emails across the full matched dataset. 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 21, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

IT security monitoring services by location

73 lists · largest first

Every IT security monitoring services 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 SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “IT security monitoring services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT security monitoring services are there worldwide?

RevenueBase identified 12,963 company matches for IT security monitoring services worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Private Sector tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most IT security monitoring services?

The United States leads with 3,270 companies, followed by India (976) and the United Kingdom (691). Every IT security monitoring services list by country and city is linked on this page.

Which city has the most IT security monitoring services?

London leads with 237 company records, followed by Sao Paulo (160) and Dubai (109).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 47,410 professional contacts with verified work emails tracked across these 12,963 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 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 SmartSearch, 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.