Company lists · Data refreshed September 2026

Top 25 Security audit and consulting firms worldwide

RevenueBase identified 13,670 company matches for security audit and consulting firms worldwide as of September 2026 and tracks 142,759 professional contacts across them, including 37,130 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for security audit and consulting 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 September 29, 2026. Country and city lists for security audit and consulting 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 Sep 29, 2026 How this list was built
13,670Companies
142,759Contacts tracked
37,130Verified emails
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The 25 largest security audit and consulting firms worldwide

Ranked by team size
Top 25 of 13,670 company matches for security audit and consulting firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 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 29, 2026n/a12,771 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2Exact matchLeawood, KS, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
3Exact matchStuttgart, GermanyHQ recorded Sep 29, 20261,001-5,0001,442 contacts →

Exact match

“Wollen Sie jemanden, der Sie auch beim Sprung in neue Märkte und bei allen anstehenden Herausforderungen begleitet?”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4Exact matchReston, VA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
5Exact matchMarseille, FranceHQ recorded Sep 29, 202610001+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 29, 2026 · View company records in RevenueBase
6Exact matchKansas City, MO, United StatesHQ recorded Sep 29, 20261,001-5,000844 contacts →

Exact match

“Today’s threatscape is relentless.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
8Exact matchPlano, TX, United StatesHQ recorded Sep 29, 2026501-1,000641 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 29, 2026 · View company records in RevenueBase
9Exact matchCourbevoie, FranceHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
10Exact matchAshburn, VA, United StatesHQ recorded Sep 29, 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 29, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Sep 29, 20261,001-5,000628 contacts →

Exact match

“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12Exact matchDubai, United Arab EmiratesHQ recorded Sep 29, 2026201-500525 contacts →

Exact match

“Protection is Paramount!”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13Exact matchCupertino, CA, United StatesHQ recorded Sep 29, 20261,001-5,000473 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 · Sep 29, 2026 · View company records in RevenueBase
14Exact matchMumbai, IndiaHQ recorded Sep 29, 2026201-500458 contacts →

Exact match

“We offer Internal Audit & Risk Consulting related services.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15Exact matchNavi Mumbai, IndiaHQ recorded Sep 29, 2026201-500400 contacts →

Exact match

“qSEAp is a CERT-IN empanelled, ISO 27001, SOC-2 Type2 and ISO 9001 certified Infosec organization founded in 2011 with a mission to deliver quality products, superior solutions…”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16Exact matchSao Paulo, BrazilHQ recorded Sep 29, 2026201-500399 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 · Sep 29, 2026 · View company records in RevenueBase
17Exact matchGurgaon, IndiaHQ recorded Sep 29, 2026201-500398 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 · Sep 29, 2026 · View company records in RevenueBase
18Exact matchCheseaux, United StatesHQ recorded Sep 29, 2026201-500392 contacts →

Exact match

“Kudelski Security is a premier cybersecurity solutions provider, working with the most security-conscious organizations in Europe and across the United States.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19Exact matchParis, FranceHQ recorded Sep 29, 20261,001-5,000382 contacts →

Exact match

“NEVERHACK is a French group specialized in cybersecurity for over 40 years.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20Exact matchGurugram, IndiaHQ recorded Sep 29, 2026201-500363 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 · Sep 29, 2026 · View company records in RevenueBase
21Exact matchBonn, GermanyHQ recorded Sep 29, 20261,001-5,000363 contacts →

Exact match

“Wir glauben an eine sichere digitale Zukunft mit minimalen Risiken und maximalen Chancen.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22Exact matchParis, FranceHQ recorded Sep 29, 2026201-500359 contacts →

Exact match

“Founded in 2010, Synetis is the leading independent French consultancy firm specialising in information systems security (ISS).”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23Exact match경기도, South KoreaHQ recorded Sep 29, 20265,001-10,000348 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24Exact matchAhmedabad, IndiaHQ recorded Sep 29, 2026201-500340 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 · Sep 29, 2026 · View company records in RevenueBase
25Exact matchMumbai, IndiaHQ recorded Sep 29, 2026201-500335 contacts →

Exact match

“T A L A K U N C H I Networks Pvt.”

Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

Showing 25 of 13,670 security audit and consulting firms worldwide

See the full list, filter by size, metro and specialty, and access 37,130 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Security audit and consulting firms worldwide at a glance

As of Sep 29, 2026
26.0%Verified-email coverage
10.4Average contacts per company
1-10Median size (employees)
2.2%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
8,428
11-50
4,069
51-200
879
201-500
188
501-1,000
31
1,001-5,000
35
5,001-10,000
9
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 security audit and consulting firms are linked below.
What qualifies
Company records worldwide whose business descriptions match “security audit and consulting 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 37,130 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 29, 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.

Security audit and consulting firms by location

96 lists · largest first

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

How many security audit and consulting firms are there worldwide?

RevenueBase identified 13,670 company matches for security audit and consulting firms 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 security audit and consulting firms?

The United States leads with 3,099 companies, followed by India (940) and the United Kingdom (797). Every security audit and consulting firms list by country and city is linked on this page.

Which city has the most security audit and consulting firms?

London leads with 295 company records, followed by Sao Paulo (175) and Paris (166).

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 37,130 professional contacts with verified work emails tracked across these 13,670 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 29, 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.