Company lists · Data refreshed September 2026

Top 25 IT security consulting services worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 41,033 companies tracked

RevenueBase identified 41,033 company matches for IT security consulting services worldwide as of September 2026 and tracks 397,692 professional contacts across them, including 109,317 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for IT security consulting 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 consulting 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

41,033Companies

397,692Contacts tracked

109,317Verified emails

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The 25 largest IT security consulting services worldwide

Ranked by team size

Top 25 of 41,033 company matches for IT security consulting 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	ELM Company	Exact match	Riyadh, Saudi ArabiaHQ recorded Sep 21, 2026	1,001-5,000	6,982 contacts →
	Exact match “Elm is the leading provider of innovative secure services & solutions to both public and private sectors in Saudi Arabia.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,222 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
4	Eplus INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,749 contacts →
	Exact match “ePlus is a customer-first, services-led, results-driven and trusted industry leader that helps organizations secure, modernize, optimize, and scale every aspect of their IT…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Nava Tech For Business	Exact match	Barueri, BrazilHQ recorded Sep 21, 2026	1,001-5,000	1,452 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
6	Site سايت	Exact match	Al Nakheel, Saudi ArabiaHQ recorded Sep 21, 2026	501-1,000	1,378 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
7	Thales Cybersecurity Products	Exact match	Austin, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,252 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
8	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
9	Synoptek	Exact match	Costa Mesa, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,037 contacts →
	Exact match “Synoptek is a leading global managed services provider and technology consulting firm that delivers transformative business results.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	PPC	Exact match	Trevose, PA, United StatesHQ recorded Sep 21, 2026	201-500	979 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Coalfire	Exact match	Chicago, IL, United StatesHQ recorded Sep 21, 2026	1,001-5,000	947 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
12	Ensign Infosecurity	Exact match	SingaporeHQ recorded Sep 21, 2026	501-1,000	888 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
13	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
14	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
15	Buchanan Technologies	Exact match	Grapevine, TX, United StatesHQ recorded Sep 21, 2026	501-1,000	818 contacts →
	Exact match “As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	SQUAD	Exact match	Paris, FranceHQ recorded Sep 21, 2026	501-1,000	803 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
17	MTI	Exact match	Staines-upon-thames, United KingdomHQ recorded Sep 21, 2026	201-500	764 contacts →
	Exact match “MTI provides award-winning, end-to-end technology solutions and services in cyber security and data centre for over 35 years.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Softcell Technologies Global Pvt. LTD	Exact match	Mumbai, IndiaHQ recorded Sep 21, 2026	501-1,000	763 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
19	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
20	Lgs, An IBM Company	Exact match	Québec, QC, CanadaHQ recorded Sep 21, 2026	501-1,000	742 contacts →
	Exact match “A consulting firm providing technology solutions and advisory services to both private and public sector organizations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Netrix Global	Exact match	Bannockburn, United StatesHQ recorded Sep 21, 2026	501-1,000	706 contacts →
	Exact match “Netrix Global is an engineering-led IT consultant and managed service provider with over three decades of experience.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	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
23	CAT Technologies LTD	Exact match	Hyd, IndiaHQ recorded Sep 21, 2026	201-500	660 contacts →
	Exact match “CAT Technology Inc, established in October is engaged in providing quality consulting services in Systems Analysis, System Design, Database Administration, Systems Engineering…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Teamlogic IT	Exact match	United StatesHQ recorded Sep 21, 2026	1,001-5,000	656 contacts →
	Exact match “TeamLogic IT provides IT service, support, project consultation and account management for businesses.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	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

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 consulting 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 41,033 IT security consulting services worldwide

See the full list, filter by size, metro and specialty, and access 109,317 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT security consulting services worldwide at a glance

As of Sep 21, 2026

27.5%Verified-email coverage

9.7Average contacts per company

1-10Median size (employees)

2.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

25,450

11-50

11,981

51-200

2,672

201-500

543

501-1,000

140

1,001-5,000

106

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 consulting services are linked below.
What qualifies: Company records worldwide whose business descriptions match “IT security consulting 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 109,317 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 consulting services by location

224 lists · largest first

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

How many IT security consulting services are there worldwide?

RevenueBase identified 41,033 company matches for IT security consulting 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 consulting services?

The United States leads with 10,117 companies, followed by India (2,688) and the United Kingdom (2,299). Every IT security consulting services list by country and city is linked on this page.

Which city has the most IT security consulting services?

London leads with 823 company records, followed by Sao Paulo (437) and Paris (344).

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 109,317 professional contacts with verified work emails tracked across these 41,033 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.