Company lists · Data refreshed September 2026

Top 25 IT security consultants worldwide

RevenueBase identified 20,768 company matches for IT security consultants worldwide as of September 2026 and tracks 214,757 professional contacts across them, including 61,864 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for IT security consultants 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 consultants 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
20,768Companies
214,757Contacts tracked
61,864Verified emails
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The 25 largest IT security consultants worldwide

Ranked by team size
Top 25 of 20,768 company matches for IT security consultants 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchUnited StatesHQ recorded Sep 21, 2026n/a12,771 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2Exact matchNanterre, FranceHQ recorded Sep 21, 20261,001-5,0003,673 contacts →

Exact match

“Orange Cyberdefense is the expert cybersecurity business unit of the Orange Group.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3Exact matchLeawood, KS, United StatesHQ recorded Sep 21, 20261,001-5,0002,222 contacts →

Exact match

“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4Exact matchBarueri, BrazilHQ recorded Sep 21, 20261,001-5,0001,452 contacts →

Exact match

“Atuamos no core de empresas líderes em seus segmentos, onde tecnologia, estratégia e operação se encontram.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5Exact matchAl Nakheel, Saudi ArabiaHQ recorded Sep 21, 2026501-1,0001,378 contacts →

Exact match

“We are established for enriching local content in designing, developing, and operating secure digital computing environments through Saudi talents, by fulfilling our role as a…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6Exact matchAustin, TX, United StatesHQ recorded Sep 21, 20261,001-5,0001,252 contacts →

Exact match

“Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7Exact matchReston, VA, United StatesHQ recorded Sep 21, 20261,001-5,0001,232 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
8Exact matchChicago, IL, United StatesHQ recorded Sep 21, 20261,001-5,000947 contacts →

Exact match

“Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9Exact matchCologne, GermanyHQ recorded Sep 21, 20261,001-5,000925 contacts →

Exact match

“At BCG Platinion, we leverage our expertise alongside the unique experiences of our teams to accelerate digital transformations for our clients.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10Exact matchSingaporeHQ recorded Sep 21, 2026501-1,000888 contacts →

Exact match

“Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Sep 21, 2026501-1,000874 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
12Exact matchKansas City, MO, United StatesHQ recorded Sep 21, 20261,001-5,000844 contacts →

Exact match

“Today’s threatscape is relentless.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13Exact matchParis, FranceHQ recorded Sep 21, 2026501-1,000803 contacts →

Exact match

“The growing threat of cyber risks, the expansion of cloud computing and the emergence of the DevOps movement are reshaping IT practices, enlighting the relevance of our vision for…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14Exact matchMumbai, IndiaHQ recorded Sep 21, 2026501-1,000763 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15Exact matchBengaluru, IndiaHQ recorded Sep 21, 2026201-500743 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
16Exact matchLondon, United KingdomHQ recorded Sep 21, 2026n/a705 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
17Exact matchCourbevoie, FranceHQ recorded Sep 21, 20261,001-5,000639 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
18Exact matchHerndon, United StatesHQ recorded Sep 21, 20261,001-5,000636 contacts →

Exact match

“Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19Exact matchDubai, United Arab EmiratesHQ recorded Sep 21, 2026501-1,000634 contacts →

Exact match

“Help AG, the cybersecurity arm of e & company, provides leading enterprise businesses and governments across the Middle East with strategic consultancy combined with tailored…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20Exact matchAshburn, VA, United StatesHQ recorded Sep 21, 2026501-1,000629 contacts →

Exact match

“Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21Exact matchStockholm, SwedenHQ recorded Sep 21, 2026501-1,000619 contacts →

Exact match

“Omegapoint hjälper dig att utveckla och cybersäkra din digitala verksamhet.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22Exact matchDubai, United Arab EmiratesHQ recorded Sep 21, 2026201-500525 contacts →

Exact match

“Protection is Paramount!”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23Exact matchMclean, VA, United StatesHQ recorded Sep 21, 2026501-1,000523 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
24Exact matchParis, FranceHQ recorded Sep 21, 202651-200506 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25Exact matchLondon, United KingdomHQ recorded Sep 21, 2026501-1,000502 contacts →

Exact match

“SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.”

Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

Showing 25 of 20,768 IT security consultants worldwide

See the full list, filter by size, metro and specialty, and access 61,864 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT security consultants worldwide at a glance

As of Sep 21, 2026
28.8%Verified-email coverage
10.3Average contacts per company
1-10Median size (employees)
2.5%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
12,733
11-50
6,190
51-200
1,396
201-500
286
501-1,000
66
1,001-5,000
53
5,001-10,000
6
10001+
9

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 consultants are linked below.
What qualifies
Company records worldwide whose business descriptions match “IT security consultants” 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 61,864 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 consultants by location

115 lists · largest first

Every IT security consultants 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 consultants”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many IT security consultants are there worldwide?

RevenueBase identified 20,768 company matches for IT security consultants 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 consultants?

The United States leads with 4,909 companies, followed by India (1,447) and the United Kingdom (1,375). Every IT security consultants list by country and city is linked on this page.

Which city has the most IT security consultants?

London leads with 515 company records, followed by Sao Paulo (214) and Paris (213).

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 61,864 professional contacts with verified work emails tracked across these 20,768 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.