Company lists · Data refreshed September 2026

Top 25 Vulnerability assessment firms worldwide

Name: Vulnerability assessment firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 3,579 companies tracked

RevenueBase identified 3,579 vulnerability assessment firms worldwide as of September 2026 and tracks 47,903 professional contacts across them, including 9,986 with verified work emails. The United States is the largest market and London the largest hub.

This list covers vulnerability assessment firms worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026. Country and city lists for vulnerability assessment firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 22, 2026 86% judged on-target in blind review

3,579Companies

47,903Contacts tracked

9,986Verified emails

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The 25 largest vulnerability assessment firms worldwide

Ranked by team size

Top 25 of 3,579 vulnerability assessment firms worldwide, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to vulnerability assessment firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Private Sector	Indirect evidence	United StatesHQ checked Sep 22, 2026	n/a	12,771 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
2	Bugcrowd	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	n/a	3,649 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 22, 2026
3	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 22, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 22, 2026
4	Trustwave, A Levelblue Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 22, 2026	501-1,000	874 contacts →
	Indirect evidence “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: RevenueBase Database · checked Sep 22, 2026
5	Pentera	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 22, 2026	201-500	486 contacts →
	Indirect evidence “Pentera provides AI-powered Automated Security Validation for enterprise security teams.” Source: RevenueBase Database · checked Sep 22, 2026
6	Techdefence	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 22, 2026	201-500	340 contacts →
	Indirect evidence “TechDefence Labs (TechD Cybersecurity Limited) Award-winning \| Innovative \| Visionary We empower organizations across the globe to secure their applications, networks, and digital…” Source: RevenueBase Database · checked Sep 22, 2026
7	Prescient Security	Indirect evidence	Nashville, TN, United StatesHQ checked Sep 22, 2026	201-500	272 contacts →
	Indirect evidence “Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: RevenueBase Database · checked Sep 22, 2026
8	Securin INC	Indirect evidence	Albuquerque, NM, United StatesHQ checked Sep 22, 2026	201-500	244 contacts →
	Indirect evidence “Securin is obsessed with helping leaders continuously improve their security posture.” Source: RevenueBase Database · checked Sep 22, 2026
9	Synack	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 22, 2026	201-500	237 contacts →
	Indirect evidence “Synack is the leader in human-led and agentic AI-powered Penetration Testing as a Service (PTaaS), transforming offensive security to help organizations proactively reduce risk…” Source: RevenueBase Database · checked Sep 22, 2026
10	TAC Security	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	51-200	208 contacts →
	Partial evidence “TAC Security (NSE: TAC) TAC Security, a leading publicly listed global cybersecurity company specializing in vulnerability management, today serves clients across 100 countries…” Source: RevenueBase Database · checked Sep 22, 2026
11	TCM Security	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 22, 2026	n/a	206 contacts →
	Indirect evidence “A veteran-owned cybersecurity company focused on penetration testing, security training, and compliance.” Source: RevenueBase Database · checked Sep 22, 2026
12	Mindpoint Group, A Quantum SKY Company	Indirect evidence	Reston, VA, United StatesHQ checked Sep 22, 2026	1,001-5,000	204 contacts →
	Indirect evidence “MindPoint Group, a Quantum Sky company, is a cybersecurity specialist trusted by U.S.” Source: RevenueBase Database · checked Sep 22, 2026
13	Census	Indirect evidence	Athens, GreeceHQ checked Sep 22, 2026	51-200	194 contacts →
	Indirect evidence “CENSUS is a cybersecurity engineering powerhouse.” Source: RevenueBase Database · checked Sep 22, 2026
14	Deepseas	Indirect evidence	Globally Distributed, United StatesHQ checked Sep 22, 2026	201-500	182 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” Source: RevenueBase Database · checked Sep 22, 2026
15	NET Square Solutions Pvt. LTD	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 22, 2026	51-200	182 contacts →
	Indirect evidence “Net Square is a company specializing in information security.” Source: RevenueBase Database · checked Sep 22, 2026
16	Reversec	Indirect evidence	Sweden, ItalyHQ checked Sep 22, 2026	201-500	177 contacts →
	Indirect evidence “We are Reversec.” Source: RevenueBase Database · checked Sep 22, 2026
17	Synacktiv	Indirect evidence	Paris, FranceHQ checked Sep 22, 2026	201-500	171 contacts →
	Indirect evidence “Synacktiv is an offensive security company founded in 2012 by several security experts.” Source: RevenueBase Database · checked Sep 22, 2026
18	Citadel Cyber Security	Indirect evidence	Rehovot, IsraelHQ checked Sep 22, 2026	51-200	167 contacts →
	Indirect evidence “Citadel is an Information Security Consulting company.” Source: RevenueBase Database · checked Sep 22, 2026
19	Payatu	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	51-200	156 contacts →
	Indirect evidence “At Payatu we believe in following one’s passion and with that thought, we have created a world class team of researchers and executors who are bending the rules to provide state…” Source: RevenueBase Database · checked Sep 22, 2026
20	Aikido Security	Partial evidence	Ghent, BelgiumHQ checked Sep 22, 2026	201-500	154 contacts →
	Partial evidence “From vulnerability management to penetration testing, secure everything you build, host, and run with Aikido.” Source: RevenueBase Database · checked Sep 22, 2026
21	Redseal, INC	Indirect evidence	Menlo Park, CA, United StatesHQ checked Sep 22, 2026	51-200	154 contacts →
	Indirect evidence “RedSeal is an agentless, AI enabled exposure management platform for hybrid and remote infrastructure.” Source: RevenueBase Database · checked Sep 22, 2026
22	Nuharbor	Indirect evidence	Colchester, VT, United StatesHQ checked Sep 22, 2026	51-200	151 contacts →
	Indirect evidence “nuHarbor is a U.S-based cybersecurity firm trusted by public sector and critical infrastructure organizations nationwide.” Source: RevenueBase Database · checked Sep 22, 2026
23	Securelayer7	Indirect evidence	Pune, IndiaHQ checked Sep 22, 2026	51-200	149 contacts →
	Indirect evidence “SecureLayer7 is a CREST accredited advanced offensive security solutions provider, combining deep expertise with innovative products to protect modern digital enterprises.” Source: RevenueBase Database · checked Sep 22, 2026
24	Attackiq	Indirect evidence	Los Altos, CA, United StatesHQ checked Sep 22, 2026	51-200	149 contacts →
	Indirect evidence “AttackIQ® is trusted by top organizations worldwide to validate security controls in real time.” Source: RevenueBase Database · checked Sep 22, 2026
25	RNS Technology Services	Indirect evidence	Dubai, United Arab EmiratesHQ checked Sep 22, 2026	51-200	147 contacts →
	Indirect evidence “RNS Technology Services, which has grown massively in the UAE, Qatar, Saudi, Singapore, Malaysia & India, is an international award-winning cybersecurity Value-Added Reseller and…” Source: RevenueBase Database · checked Sep 22, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: vulnerability assessment firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names vulnerability assessment firms.
Partial evidence: Its own public description names part of vulnerability assessment firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name vulnerability assessment firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 3,579 vulnerability assessment firms worldwide

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Vulnerability assessment firms worldwide at a glance

As of Sep 22, 2026

20.8%Verified-email coverage

13.4Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

2,270

11-50

1,076

51-200

191

201-500

501-1,000

1,001-5,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among vulnerability assessment firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for vulnerability assessment firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “vulnerability assessment firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names vulnerability assessment firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among vulnerability assessment firms, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 9,986 across the full list. 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 22, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Vulnerability assessment firms by location

16 lists · largest first

Every Vulnerability assessment firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Vulnerability assessment firms based in Hyderabad, India35

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names vulnerability assessment firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many vulnerability assessment firms are there worldwide?

RevenueBase identified 3,579 vulnerability assessment firms worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Private Sector, headquartered in Worldwide, tops this list with the largest team on record.

Which country has the most vulnerability assessment firms?

The United States leads with 904 companies, followed by India (382) and the United Kingdom (200). Every vulnerability assessment firms list by country and city is linked on this page.

Which city has the most vulnerability assessment firms?

London leads with 74 headquartered companies, followed by Sao Paulo (40) and Toronto (37).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 9,986 verified decision-maker contacts tracked across these 3,579 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 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 Smart Search, 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.