Company lists · Data refreshed September 2026

Top 25 Vulnerability assessment service providers based in the United States

Name: Vulnerability assessment service providers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 678 companies tracked

RevenueBase identified 678 vulnerability assessment service providers headquartered in the United States as of September 2026 and tracks 6,040 professional contacts across them, including 2,189 with verified work emails. New York is the largest hub.

This list covers vulnerability assessment service providers headquartered in the United States, 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.

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

678Companies

6,040Contacts tracked

2,189Verified emails

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The 25 largest vulnerability assessment service providers based in the United States

Ranked by team size

Top 25 of 678 vulnerability assessment service providers based in the United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to vulnerability assessment service providers: 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	Cobalt	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	201-500	350 contacts →
	Indirect evidence “Cobalt is the pioneer in pentesting as a service and a leader in offensive security services.” Source: RevenueBase Database · checked Sep 22, 2026
2	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
3	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
4	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
5	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
6	Safebreach	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 22, 2026	51-200	138 contacts →
	Indirect evidence “SafeBreach is on a mission to help organizations have certainty in their security.” Source: RevenueBase Database · checked Sep 22, 2026
7	Tracesecurity	Partial evidence	Baton Rouge, LA, United StatesHQ checked Sep 22, 2026	51-200	115 contacts →
	Partial evidence “TraceSecurity is a leading cybersecurity services company, providing a broad range of services and solutions in IT security compliance, risk and vulnerability management, and…” Source: RevenueBase Database · checked Sep 22, 2026
8	Strategic Security	Partial evidence	Alexandria, VA, United StatesHQ checked Sep 22, 2026	n/a	113 contacts →
	Partial evidence “Strategic Security is an IT Security consulting firm that provides in-depth technical security assessments of your network, web application, and regulatory compliance gap analysis…” Source: RevenueBase Database · checked Sep 22, 2026
9	Directdefense	Partial evidence	Denver, CO, United StatesHQ checked Sep 22, 2026	51-200	111 contacts →
	Partial evidence “DirectDefense provides enterprise risk assessments, penetration testing, ICS/SCADA security services, and 24/7 managed security services for companies of all sizes.” Source: RevenueBase Database · checked Sep 22, 2026
10	WATI	Indirect evidence	Folsom, CA, United StatesHQ checked Sep 22, 2026	201-500	109 contacts →
	Indirect evidence “West Advanced Technologies, Inc.(WATI) is a California-headquartered technology solutions provider, delivering 100% success for clients from government agencies, tech companies…” Source: RevenueBase Database · checked Sep 22, 2026
11	Ioactive, INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 22, 2026	51-200	107 contacts →
	Indirect evidence “IOActive is a trusted partner for Global enterprises, providing research-fueled security services across all industries.” Source: RevenueBase Database · checked Sep 22, 2026
12	Nucleus Security	Indirect evidence	Sarasota, FL, United StatesHQ checked Sep 22, 2026	51-200	93 contacts →
	Indirect evidence “Nucleus is the exposure management platform enterprise and government security leaders rely on to reduce cyber risk at scale.” Source: RevenueBase Database · checked Sep 22, 2026
13	Redlegg	Indirect evidence	St. Charles, IL, United StatesHQ checked Sep 22, 2026	51-200	68 contacts →
	Indirect evidence “We've been serving and defending businesses since 2008 as trusted, personable guides in this complex, ever-changing, high-stakes field-MSSP Alert's Top 50 MSSPs Of 2020 -LogRhythm…” Source: RevenueBase Database · checked Sep 22, 2026
14	Galactic Advisors	Indirect evidence	Nashville, United StatesHQ checked Sep 22, 2026	11-50	60 contacts →
	Indirect evidence “We make cybersecurity easy and understandable.” Source: RevenueBase Database · checked Sep 22, 2026
15	Vulncheck	Indirect evidence	Lexington, MA, United StatesHQ checked Sep 22, 2026	51-200	59 contacts →
	Indirect evidence “VulnCheck helps organizations outpace adversaries with exploit intelligence that predicts avenues of attack with speed and accuracy.” Source: RevenueBase Database · checked Sep 22, 2026
16	Sandtech Solutions	Indirect evidence	San Antonio, TX, United StatesHQ checked Sep 22, 2026	11-50	58 contacts →
	Indirect evidence “SandTech Solutions is a Certified 8a member as well as a Service Disabled Veteran-Owned Small Business (SDVOSB).” Source: RevenueBase Database · checked Sep 22, 2026
17	Mondoo	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	51-200	55 contacts →
	Partial evidence “Mondoo's Agentic Managed Vulnerability Service, a combination of local expert security professionals and a proven AI-native platform, delivers the outcomes security professionals…” Source: RevenueBase Database · checked Sep 22, 2026
18	Synercomm	Indirect evidence	Brookfield, WI, United StatesHQ checked Sep 22, 2026	51-200	52 contacts →
	Indirect evidence “SynerComm strengthens your cybersecurity and network defenses across your entire technology stack.” Source: RevenueBase Database · checked Sep 22, 2026
19	Compass IT Compliance	Indirect evidence	North Providence, RI, United StatesHQ checked Sep 22, 2026	11-50	51 contacts →
	Indirect evidence “Founded in 2010, Compass IT Compliance is a nationwide leader in providing IT security, compliance, and risk management services to organizations of all sizes in all industries.” Source: RevenueBase Database · checked Sep 22, 2026
20	Projectdiscovery	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 22, 2026	11-50	47 contacts →
	Indirect evidence “Software ships daily.” Source: RevenueBase Database · checked Sep 22, 2026
21	Securit360	Indirect evidence	Birmingham, AL, United StatesHQ checked Sep 22, 2026	11-50	46 contacts →
	Indirect evidence “SecurIT360 is a unique company driven by Cyber knowledge and applying it to eliminate blind spots.” Source: RevenueBase Database · checked Sep 22, 2026
22	H2l Solutions INC	Indirect evidence	Huntsville, AL, United StatesHQ checked Sep 22, 2026	11-50	46 contacts →
	Indirect evidence “H2L Solutions is a Service-Disabled Veteran-Owned Small Business (SDVOSB) and HUBZone-certified cybersecurity company headquartered in Huntsville, Alabama.” Source: RevenueBase Database · checked Sep 22, 2026
23	Secure Ideas, LLC	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 22, 2026	11-50	44 contacts →
	Indirect evidence “Founded in 2010, Secure Ideas is a small-business consulting firm.” Source: RevenueBase Database · checked Sep 22, 2026
24	Bugbase	Partial evidence	San Francisco, United StatesHQ checked Sep 22, 2026	11-50	41 contacts →
	Partial evidence “Pentest Copilot Enterprise is an autonomous zero-day vulnerability discovery agent that continuously tests your organization like a real attacker.” Source: RevenueBase Database · checked Sep 22, 2026
25	VDA Labs, LLC	Indirect evidence	Grand Rapids, MI, United StatesHQ checked Sep 22, 2026	11-50	39 contacts →
	Indirect evidence “VDA Labs is on a mission to make the world a safer place through improved Cyber Security!” 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 service providers. 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 service providers.
Partial evidence: Its own public description names part of vulnerability assessment service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name vulnerability assessment service providers. 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 678 vulnerability assessment service providers based in the United States

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Vulnerability assessment service providers based in the United States at a glance

As of Sep 22, 2026

36.2%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

3.8%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

428

11-50

208

51-200

201-500

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 678 companies.

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 service providers, 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.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “vulnerability assessment service providers”. 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 service providers), 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 service providers, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
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, 2,189 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 service providers by metro

Vulnerability assessment service providers in New York26

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 service providers, 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 service providers are there based in the United States?

RevenueBase identified 678 vulnerability assessment service providers headquartered in the United States 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?

Cobalt, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most vulnerability assessment service providers?

New York leads with 26 headquartered companies, followed by San Francisco (18) and Austin (16).

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 2,189 verified decision-maker contacts tracked across these 678 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.