Company lists · Data refreshed November 2026

Top 25 IT security audit firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 10,125 companies tracked

RevenueBase identified 10,125 company matches for IT security audit firms worldwide as of November 2026 and tracks 119,044 professional contacts across them, including 31,827 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for IT security audit firms 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 November 5, 2026. Country and city lists for IT security audit firms 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 Nov 5, 2026 How this list was built

10,125Companies

119,044Contacts tracked

31,827Verified emails

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The 25 largest IT security audit firms worldwide

Ranked by team size

Top 25 of 10,125 company matches for IT security audit firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 5, 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 Nov 5, 2026	n/a	13,149 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
2	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Nov 5, 2026	1,001-5,000	2,171 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 · Nov 5, 2026 · View company records in RevenueBase
3	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	1,346 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 · Nov 5, 2026 · View company records in RevenueBase
4	COBRA	Exact match	London, United KingdomHQ recorded Nov 5, 2026	n/a	782 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 · Nov 5, 2026 · View company records in RevenueBase
5	Softcell Technologies Global Pvt. LTD	Exact match	Mumbai, IndiaHQ recorded Nov 5, 2026	501-1,000	733 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 · Nov 5, 2026 · View company records in RevenueBase
6	I-Tracing	Exact match	Courbevoie, FranceHQ recorded Nov 5, 2026	1,001-5,000	687 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 · Nov 5, 2026 · View company records in RevenueBase
7	Secunet Security Networks AG	Exact match	Essen, GermanyHQ recorded Nov 5, 2026	1,001-5,000	680 contacts →
	Exact match “secunet – We are the Guardians of Europe's Digital Freedom.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
8	Telos Corporation	Exact match	Ashburn, VA, United StatesHQ recorded Nov 5, 2026	501-1,000	676 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 · Nov 5, 2026 · View company records in RevenueBase
9	Vikingcloud	Exact match	Chicago, IL, United StatesHQ recorded Nov 5, 2026	1,001-5,000	665 contacts →
	Exact match “VikingCloud delivers cybersecurity and compliance solutions that simply work.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
10	Network Intelligence	Exact match	Plano, TX, United StatesHQ recorded Nov 5, 2026	501-1,000	658 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 · Nov 5, 2026 · View company records in RevenueBase
11	own.security	Exact match	Paris, FranceHQ recorded Nov 5, 2026	51-200	558 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 · Nov 5, 2026 · View company records in RevenueBase
12	Aujas Cybersecurity	Exact match	Cupertino, United StatesHQ recorded Nov 5, 2026	1,001-5,000	514 contacts →
	Exact match “At Aujas Cybersecurity, we specialize in building and transforming cybersecurity postures to help businesses effectively mitigate risks.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
13	Xcelerate Solutions	Exact match	Mclean, VA, United StatesHQ recorded Nov 5, 2026	1,001-5,000	458 contacts →
	Exact match “At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
14	IBN Technologies	Exact match	Miami, FL, United StatesHQ recorded Nov 5, 2026	51-200	417 contacts →
	Exact match “Welcome to IBN Technologies, LLC, Your Trusted Partner in Cybersecurity, Cloud, and Finance Solutions With 26+ years of expertise, IBN Technologies leads in delivering integrated…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
15	Acpl Systems	Exact match	Gurgaon, IndiaHQ recorded Nov 5, 2026	201-500	413 contacts →
	Exact match “ACPL Systems is a pure-play cybersecurity services company focused on helping organisations translate security investments into measurable outcomes.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
16	SK Shieldus	Exact match	경기도, South KoreaHQ recorded Nov 5, 2026	5,001-10,000	411 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
17	Neverhack	Exact match	Paris, FranceHQ recorded Nov 5, 2026	1,001-5,000	400 contacts →
	Exact match “NEVERHACK is a French group specialized in cybersecurity for over 40 years.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
18	G Data Cyberdefense	Exact match	Bochum, GermanyHQ recorded Nov 5, 2026	501-1,000	392 contacts →
	Exact match “Progress is our motivation because we are convinced that it will lead us to a successful future – independent of industries, companies and social classes.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
19	Esec Forte Technologies	Exact match	Gurgaon, IndiaHQ recorded Nov 5, 2026	201-500	385 contacts →
	Exact match “eSec Forte® Technologies is a CMMi Level 3 certified Global Consulting and IT Security Services company with offerings across Cloud Security, Cyber Forensics, Malware Detection…” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
20	Centorrino Technologies	Exact match	Coburg, AustraliaHQ recorded Nov 5, 2026	501-1,000	383 contacts →
	Exact match “We are an Australian-owned, full-service managed ICT solutions and cyber security provider with a sovereign team of 500+ across Australia & New Zealand.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
21	T Security - Dach	Exact match	Bonn, GermanyHQ recorded Nov 5, 2026	1,001-5,000	379 contacts →
	Exact match “Wir glauben an eine sichere digitale Zukunft mit minimalen Risiken und maximalen Chancen.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
22	Truesec	Exact match	SwedenHQ recorded Nov 5, 2026	201-500	360 contacts →
	Exact match “Prevent Breach & Minimize Impact” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
23	Safeway	Exact match	Sao Paulo, BrazilHQ recorded Nov 5, 2026	201-500	359 contacts →
	Exact match “A SAFEWAY empresa que integra a plataforma de cibersegurança do Grupo Stefanini se une a Protega.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
24	Talakunchi Networks PVT LTD	Exact match	Mumbai, IndiaHQ recorded Nov 5, 2026	201-500	355 contacts →
	Exact match “T A L A K U N C H I Networks Pvt.” Recorded in the RevenueBase company graph · Nov 5, 2026 · View company records in RevenueBase
25	Techdefence	Exact match	Ahmedabad, IndiaHQ recorded Nov 5, 2026	201-500	346 contacts →
	Exact match “TechDefence Labs (TechD Cybersecurity Limited) Award-winning \| Innovative \| Visionary We empower organizations across the globe to secure their applications, networks, and digital…” Recorded in the RevenueBase company graph · Nov 5, 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 audit firms”. 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 10,125 IT security audit firms worldwide

See the full list, filter by size, metro and specialty, and access 31,827 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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IT security audit firms worldwide at a glance

As of Nov 5, 2026

26.7%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · London

Nov 5, 2026Page data refreshed

Companies by employee count

1-10

6,065

11-50

3,142

51-200

692

201-500

138

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 audit firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “IT security audit firms” 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 31,827 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 November 5, 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 audit firms by location

82 lists · largest first

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

How many IT security audit firms are there worldwide?

RevenueBase identified 10,125 company matches for IT security audit firms worldwide as of November 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 audit firms?

The United States leads with 2,097 companies, followed by India (887) and the United Kingdom (679). Every IT security audit firms list by country and city is linked on this page.

Which city has the most IT security audit firms?

London leads with 251 company records, followed by Sao Paulo (115) and Paris (110).

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 31,827 professional contacts with verified work emails tracked across these 10,125 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 November 5, 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.