Company lists · Data refreshed September 2026

Top 25 Penetration testing firms worldwide

Name: Penetration testing firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 12,322 companies tracked

RevenueBase identified 12,322 company matches for penetration testing firms worldwide as of September 2026 and tracks 145,384 professional contacts across them, including 39,709 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for penetration testing 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 20, 2026. Country and city lists for penetration testing 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 20, 2026 How this list was built

12,322Companies

145,384Contacts tracked

39,709Verified emails

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The 25 largest penetration testing firms worldwide

Ranked by team size

Top 25 of 12,322 company matches for penetration testing firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 20, 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 20, 2026	n/a	12,771 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
2	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
3	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
4	Coalfire	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
5	Ensign Infosecurity	Exact match	SingaporeHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
6	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
7	Synack RED Team	Exact match	Austin, TX, United StatesHQ recorded Sep 20, 2026	n/a	813 contacts →
	Exact match “The Synack Red Team is a private freelance security research team that spans 6 continents and over 80 countries.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
8	Softcell Technologies Global Pvt. LTD	Exact match	Mumbai, IndiaHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
9	SISA	Exact match	Bengaluru, IndiaHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
10	Network Intelligence	Exact match	Plano, TX, United StatesHQ recorded Sep 20, 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 20, 2026 · View company records in RevenueBase
11	I-Tracing	Exact match	Courbevoie, FranceHQ recorded Sep 20, 2026	1,001-5,000	639 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 20, 2026 · View company records in RevenueBase
12	Telos Corporation	Exact match	Ashburn, VA, United StatesHQ recorded Sep 20, 2026	501-1,000	629 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 20, 2026 · View company records in RevenueBase
13	Netspi	Exact match	Minneapolis, MN, United StatesHQ recorded Sep 20, 2026	501-1,000	587 contacts →
	Exact match “NetSPI® pioneered Penetration Testing as a Service (PTaaS) and leads the industry in modern, continuous pentesting.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
14	Paramount Computer Systems	Exact match	Dubai, United Arab EmiratesHQ recorded Sep 20, 2026	201-500	525 contacts →
	Exact match “Protection is Paramount!” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
15	Ultraviolet Cyber	Exact match	Mclean, VA, United StatesHQ recorded Sep 20, 2026	501-1,000	523 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 20, 2026 · View company records in RevenueBase
16	own.security	Exact match	Paris, FranceHQ recorded Sep 20, 2026	51-200	506 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 20, 2026 · View company records in RevenueBase
17	Securityhq	Exact match	London, United KingdomHQ recorded Sep 20, 2026	501-1,000	502 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 20, 2026 · View company records in RevenueBase
18	Protechmanize	Exact match	Thane, IndiaHQ recorded Sep 20, 2026	501-1,000	484 contacts →
	Exact match “At ProTechmanize, we’re committed to making cybersecurity simpler, stronger, and more future ready for the organizations we serve.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
19	Aujas Cybersecurity	Exact match	Cupertino, CA, United StatesHQ recorded Sep 20, 2026	1,001-5,000	473 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 20, 2026 · View company records in RevenueBase
20	Safeway	Exact match	Sao Paulo, BrazilHQ recorded Sep 20, 2026	201-500	399 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 20, 2026 · View company records in RevenueBase
21	Acpl Systems	Exact match	Gurgaon, IndiaHQ recorded Sep 20, 2026	201-500	398 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 20, 2026 · View company records in RevenueBase
22	PT Itsec Asia TBK	Exact match	Jakarta, IndonesiaHQ recorded Sep 20, 2026	201-500	388 contacts →
	Exact match “ITSEC Asia is a leading cybersecurity company in Indonesia, listed on the Indonesian Stock Exchange (“CYBR”), with over 400 employees across five countries.” Recorded in the RevenueBase company graph · Sep 20, 2026 · View company records in RevenueBase
23	G Data Cyberdefense	Exact match	Bochum, GermanyHQ recorded Sep 20, 2026	501-1,000	386 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 · Sep 20, 2026 · View company records in RevenueBase
24	IBN Technologies	Exact match	Miami, FL, United StatesHQ recorded Sep 20, 2026	51-200	365 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 · Sep 20, 2026 · View company records in RevenueBase
25	horizon3.ai	Exact match	San Francisco, CA, United StatesHQ recorded Sep 20, 2026	201-500	364 contacts →
	Exact match “Horizon3.ai answers the two most important questions in cybersecurity: If someone tried to compromise us, would we hold up?” Recorded in the RevenueBase company graph · Sep 20, 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 “penetration testing 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 12,322 penetration testing firms worldwide

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Penetration testing firms worldwide at a glance

As of Sep 20, 2026

27.3%Verified-email coverage

11.8Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

7,128

11-50

4,027

51-200

877

201-500

192

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 penetration testing firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “penetration testing 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 39,709 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 20, 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.

Penetration testing firms by location

83 lists · largest first

Every Penetration testing 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 “penetration testing firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many penetration testing firms are there worldwide?

RevenueBase identified 12,322 company matches for penetration testing 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 penetration testing firms?

The United States leads with 2,696 companies, followed by India (1,216) and the United Kingdom (757). Every penetration testing firms list by country and city is linked on this page.

Which city has the most penetration testing firms?

London leads with 292 company records, followed by Sao Paulo (132) and Paris (115).

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 39,709 professional contacts with verified work emails tracked across these 12,322 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 20, 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.