Company lists · Data refreshed September 2026

Top 25 Cybersecurity advisory firms worldwide

Name: Cybersecurity advisory firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 33,800 companies tracked

RevenueBase identified 33,800 company matches for cybersecurity advisory firms worldwide as of September 2026 and tracks 497,337 professional contacts across them, including 165,002 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for cybersecurity advisory 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 21, 2026. Country and city lists for cybersecurity advisory 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 21, 2026 How this list was built

33,800Companies

497,337Contacts tracked

165,002Verified emails

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The 25 largest cybersecurity advisory firms worldwide

Ranked by team size

Top 25 of 33,800 company matches for cybersecurity advisory firms 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	Palo Alto Networks	Exact match	Santa Clara, CA, United StatesHQ recorded Sep 21, 2026	10001+	18,431 contacts →
	Exact match “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Sep 21, 2026	10001+	14,289 contacts →
	Exact match “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	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
4	Symantec	Exact match	San Jose, CA, United StatesHQ recorded Sep 21, 2026	10001+	11,169 contacts →
	Exact match “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Trend Micro	Exact match	Yoyogi, JapanHQ recorded Sep 21, 2026	5,001-10,000	4,942 contacts →
	Exact match “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Sophos	Exact match	Abingdon, United KingdomHQ recorded Sep 21, 2026	5,001-10,000	4,925 contacts →
	Exact match “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Kaspersky	Exact match	Stadtkreis 1 Altstadt, FranceHQ recorded Sep 21, 2026	5,001-10,000	3,822 contacts →
	Exact match “Our mission is simple – building a safer world.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	Orange Cyberdefense	Exact match	Nanterre, FranceHQ recorded Sep 21, 2026	1,001-5,000	3,673 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
9	Bugcrowd	Exact match	San Francisco, CA, United StatesHQ recorded Sep 21, 2026	n/a	3,649 contacts →
	Exact match “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Trellix	Exact match	Plano, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	3,447 contacts →
	Exact match “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	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
12	Sailpoint	Exact match	Austin, TX, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,886 contacts →
	Exact match “SailPoint equips the modern enterprise to seamlessly manage and secure access to applications and data through the lens of identity – at speed and scale.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Rapid7	Exact match	Boston, MA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,822 contacts →
	Exact match “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Mimecast	Exact match	London, United KingdomHQ recorded Sep 21, 2026	1,001-5,000	2,304 contacts →
	Exact match “organizations.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	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
16	Tenable	Exact match	Columbia, MD, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,173 contacts →
	Exact match “Tenable is the exposure management company, exposing and closing the cybersecurity gaps that erode business value, reputation and trust.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Bitdefender	Exact match	Bucuresti, RomaniaHQ recorded Sep 21, 2026	1,001-5,000	2,172 contacts →
	Exact match “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Barracuda	Exact match	Campbell, CA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	2,157 contacts →
	Exact match “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 21, 2026	10001+	1,949 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Sans Institute	Exact match	Rockville, MD, United StatesHQ recorded Sep 21, 2026	n/a	1,886 contacts →
	Exact match “SANS is the most trusted and by far the largest source for information and cybersecurity training and certification in the world.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Inspira Enterprise	Exact match	Mumbai, IndiaHQ recorded Sep 21, 2026	1,001-5,000	1,773 contacts →
	Exact match “Inspira Enterprise is a global Cybersecurity & Data Analytics & AI services provider with a presence in North America, ASEAN, Middle East, India, and Africa regions.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Beyondtrust	Exact match	Johns Creek, GA, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,669 contacts →
	Exact match “BeyondTrust is the global cybersecurity leader protecting Paths to Privilege™.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
23	Fortra	Exact match	Eden Prairie, MN, United StatesHQ recorded Sep 21, 2026	1,001-5,000	1,648 contacts →
	Exact match “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Quick Heal	Exact match	Pune, IndiaHQ recorded Sep 21, 2026	1,001-5,000	1,510 contacts →
	Exact match “Quick Heal Technologies Limited is one of the leading providers of IT Security and Data Protection Solutions with a strong footprint in India and an evolving global presence.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Airbus Protect	Exact match	Blagnac, FranceHQ recorded Sep 21, 2026	1,001-5,000	1,431 contacts →
	Exact match “Airbus Protect is an Airbus subsidiary bringing together expertise in cybersecurity, safety and sustainability-related services.” 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 “cybersecurity advisory 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 33,800 cybersecurity advisory firms worldwide

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Cybersecurity advisory firms worldwide at a glance

As of Sep 21, 2026

33.2%Verified-email coverage

14.7Average contacts per company

1-10Median size (employees)

2.6%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

19,960

11-50

10,263

51-200

2,566

201-500

564

501-1,000

181

1,001-5,000

148

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 cybersecurity advisory firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “cybersecurity advisory 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 165,002 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.

Cybersecurity advisory firms by location

178 lists · largest first

Every Cybersecurity advisory 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 “cybersecurity advisory firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity advisory firms are there worldwide?

RevenueBase identified 33,800 company matches for cybersecurity advisory 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?

Palo Alto Networks tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most cybersecurity advisory firms?

The United States leads with 8,793 companies, followed by India (2,337) and the United Kingdom (2,079). Every cybersecurity advisory firms list by country and city is linked on this page.

Which city has the most cybersecurity advisory firms?

London leads with 875 company records, followed by Paris (364) and Sao Paulo (324).

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 165,002 professional contacts with verified work emails tracked across these 33,800 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.