Company lists · Data refreshed September 2026

Top 25 Cybersecurity consulting services based in the United States

Name: Cybersecurity consulting services based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 11,050 companies tracked

RevenueBase identified 11,050 cybersecurity consulting services headquartered in the United States as of September 2026 and tracks 170,975 professional contacts across them, including 65,291 with verified work emails. New York is the largest hub.

This list covers cybersecurity consulting services 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 21, 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 21, 2026 86% judged on-target in blind review

11,050Companies

170,975Contacts tracked

65,291Verified emails

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The 25 largest cybersecurity consulting services based in the United States

Ranked by team size

Top 25 of 11,050 cybersecurity consulting services based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity consulting services: 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	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 2026	10001+	14,289 contacts →
	Indirect evidence “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: RevenueBase Database · checked Sep 21, 2026
2	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	10001+	11,169 contacts →
	Partial evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 21, 2026
3	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,222 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 21, 2026
4	Fortra	Partial evidence	Eden Prairie, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,648 contacts →
	Partial evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
5	Thales Cybersecurity Products	Partial evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,252 contacts →
	Partial evidence “Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.” Source: RevenueBase Database · checked Sep 21, 2026
6	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,232 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 21, 2026
7	Imperva	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	10001+	1,217 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Sep 21, 2026
8	GDT	Indirect evidence	Dallas, TX, United StatesHQ checked Sep 21, 2026	501-1,000	1,032 contacts →
	Indirect evidence “As an award-winning, global IT solutions provider, we are changing the nature of transformation.” Source: RevenueBase Database · checked Sep 21, 2026
9	PPC	Indirect evidence	Trevose, PA, United StatesHQ checked Sep 21, 2026	201-500	979 contacts →
	Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 21, 2026
10	Coalfire	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	947 contacts →
	Partial evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 21, 2026
11	Trustwave, A Levelblue Company	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	501-1,000	874 contacts →
	Partial 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 21, 2026
12	Cyderes	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 21, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 21, 2026
13	SSE	Partial evidence	St Louis, MO, United StatesHQ checked Sep 21, 2026	201-500	837 contacts →
	Partial evidence “Systems Service Enterprises, Inc.(SSE) is a leader in Information Technology, Cybersecurity Compliance, and Training and Technical Data solutions for small-medium sized businesses…” Source: RevenueBase Database · checked Sep 21, 2026
14	Buchanan Technologies	Partial evidence	Grapevine, TX, United StatesHQ checked Sep 21, 2026	501-1,000	818 contacts →
	Partial evidence “As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…” Source: RevenueBase Database · checked Sep 21, 2026
15	Application Specialist Kompany ASK	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 21, 2026	n/a	785 contacts →
	Indirect evidence “ASK is now Convergence Networks!” Source: RevenueBase Database · checked Sep 21, 2026
16	TPX	Indirect evidence	Austin, TX, United StatesHQ checked Sep 21, 2026	1,001-5,000	751 contacts →
	Indirect evidence “TPx is the reliable sidekick every growing business deserves, powering your tech while you take the lead.” Source: RevenueBase Database · checked Sep 21, 2026
17	IT Solutions	Indirect evidence	Fort Washington, PA, United StatesHQ checked Sep 21, 2026	501-1,000	683 contacts →
	Indirect evidence “With 30 years of experience as a trusted managed services provider, we're your dedicated partner in navigating the complex world of technology, so you can focus on growing your…” Source: RevenueBase Database · checked Sep 21, 2026
18	Fireeye, INC	Indirect evidence	Milpitas, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	676 contacts →
	Indirect evidence “We are now officially Trellix!” Source: RevenueBase Database · checked Sep 21, 2026
19	SDG Corporation	Indirect evidence	Norwalk, CT, United StatesHQ checked Sep 21, 2026	201-500	660 contacts →
	Indirect evidence “With more than 30 years of experience partnering with global enterprises on complex business and IT initiatives, SDG is a trusted provider of advisory, transformation, and managed…” Source: RevenueBase Database · checked Sep 21, 2026
20	Network Intelligence	Indirect evidence	Plano, TX, United StatesHQ checked Sep 21, 2026	501-1,000	641 contacts →
	Indirect evidence “At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Source: RevenueBase Database · checked Sep 21, 2026
21	Telos Corporation	Indirect evidence	Ashburn, VA, United StatesHQ checked Sep 21, 2026	501-1,000	629 contacts →
	Indirect evidence “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Source: RevenueBase Database · checked Sep 21, 2026
22	Vikingcloud	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	1,001-5,000	628 contacts →
	Partial evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 21, 2026
23	Planned Systems International	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 21, 2026	1,001-5,000	611 contacts →
	Indirect evidence “Since 1988, PSI teams have provided our government customers with innovative, cost effective solutions that solve today’s complex challenges, improve operational efficiencies, and…” Source: RevenueBase Database · checked Sep 21, 2026
24	NIC	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	n/a	581 contacts →
	Partial evidence “NIC has been providing IT Solutions, Cybersecurity, and Cloud Services for businesses and organizations for the past two decades.” Source: RevenueBase Database · checked Sep 21, 2026
25	Integris	Indirect evidence	Cranbury Township, NJ, United StatesHQ checked Sep 21, 2026	501-1,000	574 contacts →
	Indirect evidence “Integris is a national leader in future-ready Managed Services, delivering innovative solutions that drive digital maturity for small and midsize businesses.” Source: RevenueBase Database · checked Sep 21, 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: cybersecurity consulting services. 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 cybersecurity consulting services.
Partial evidence: Its own public description names part of cybersecurity consulting services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity consulting services. 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 11,050 cybersecurity consulting services based in the United States

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Cybersecurity consulting services based in the United States at a glance

As of Sep 21, 2026

38.2%Verified-email coverage

15.5Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

6,563

11-50

3,248

51-200

905

201-500

189

501-1,000

1,001-5,000

5,001-10,000

10001+

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 11,050 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 cybersecurity consulting services, 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 “cybersecurity consulting services”. 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 cybersecurity consulting services), 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 cybersecurity consulting services, 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, 65,291 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 21, 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.

Cybersecurity consulting services by metro

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 cybersecurity consulting services, 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 cybersecurity consulting services are there based in the United States?

RevenueBase identified 11,050 cybersecurity consulting services 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?

Fortinet, headquartered in Sunnyvale, tops this list with the largest team on record.

Which city has the most cybersecurity consulting services?

New York leads with 328 headquartered companies, followed by Houston (204) and Washington (202).

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 65,291 verified decision-maker contacts tracked across these 11,050 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 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 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.