Company lists · Data refreshed September 2026

Top 25 Cybersecurity consultancies based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 17,981 companies tracked

RevenueBase identified 17,981 cybersecurity consultancies headquartered in the United States as of September 2026 and tracks 432,790 professional contacts across them, including 177,039 with verified work emails and 146,373 with mobile numbers. New York is the largest hub.

This list covers cybersecurity consultancies 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 24, 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 24, 2026 86% judged on-target in blind review

17,981Companies

432,790Contacts tracked

177,039Verified emails

146,373Mobile numbers

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The 25 largest cybersecurity consultancies based in the United States

Ranked by team size

Top 25 of 17,981 cybersecurity consultancies based in the United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity consultancies: 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	Palo Alto Networks	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 24, 2026	10001+	18,431 contacts →
	Partial evidence “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Source: RevenueBase Database · checked Sep 24, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 24, 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 24, 2026
3	Guidehouse	Indirect evidence	Mclean, VA, United StatesHQ checked Sep 24, 2026	10001+	12,815 contacts →
	Indirect evidence “Guidehouse is a global AI-led professional services firm delivering advisory, technology, and managed services to the commercial and government sectors.” Source: RevenueBase Database · checked Sep 24, 2026
4	Symantec	Partial evidence	San Jose, CA, United StatesHQ checked Sep 24, 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 24, 2026
5	Crowdstrike	Partial evidence	Remote, United StatesHQ checked Sep 24, 2026	5,001-10,000	10,118 contacts →
	Partial evidence “CrowdStrike (Nasdaq: CRWD), a global cybersecurity leader, has redefined modern security with the world’s most advanced cloud-native platform for protecting critical areas of…” Source: RevenueBase Database · checked Sep 24, 2026
6	Comcast Business	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 24, 2026	10001+	8,242 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026
7	Check Point Software	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 24, 2026	5,001-10,000	7,668 contacts →
	Indirect evidence “Check Point Software Technologies Ltd.” Source: RevenueBase Database · checked Sep 24, 2026
8	Convergint	Indirect evidence	Hoffman Estates, IL, United StatesHQ checked Sep 24, 2026	10001+	5,707 contacts →
	Indirect evidence “Convergint is a global systems integrator focused on delivering results for our customers through unparalleled service excellence.” Source: RevenueBase Database · checked Sep 24, 2026
9	Bugcrowd	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 24, 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 24, 2026
10	U.S. Security Associates, INC	Indirect evidence	Roswell, GA, United StatesHQ checked Sep 24, 2026	10001+	3,592 contacts →
	Indirect evidence “U.S.” Source: RevenueBase Database · checked Sep 24, 2026
11	Trellix	Partial evidence	Plano, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,447 contacts →
	Partial evidence “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Source: RevenueBase Database · checked Sep 24, 2026
12	Arctic Wolf	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,145 contacts →
	Indirect evidence “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Source: RevenueBase Database · checked Sep 24, 2026
13	Qualys	Indirect evidence	Foster City, CA, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,058 contacts →
	Indirect evidence “Qualys, Inc.(NASDAQ: QLYS) is a leading provider of disruptive cloud-based security, compliance and IT solutions with more than subscription customers worldwide, including a…” Source: RevenueBase Database · checked Sep 24, 2026
14	Sentinelone	Partial evidence	Mountain View, CA, United StatesHQ checked Sep 24, 2026	1,001-5,000	3,052 contacts →
	Partial evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Sep 24, 2026
15	GTT	Indirect evidence	Arlington, VA, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,933 contacts →
	Indirect evidence “GTT is a leading networking and security as a service provider for multinational organizations, simply and securely connecting people and machines to data and applications –…” Source: RevenueBase Database · checked Sep 24, 2026
16	Sailpoint	Indirect evidence	Austin, TX, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,886 contacts →
	Indirect evidence “SailPoint equips the modern enterprise to seamlessly manage and secure access to applications and data through the lens of identity – at speed and scale.” Source: RevenueBase Database · checked Sep 24, 2026
17	Rapid7	Partial evidence	Boston, MA, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,822 contacts →
	Partial evidence “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Source: RevenueBase Database · checked Sep 24, 2026
18	Compunnel INC	Partial evidence	Princeton, NJ, United StatesHQ checked Sep 24, 2026	5,001-10,000	2,502 contacts →
	Partial evidence “Compunnel serves as a global partner for talent, digital, and cybersecurity solutions, designed to help enterprises staff critical roles, modernize technology, and strengthen…” Source: RevenueBase Database · checked Sep 24, 2026
19	Security Industry Specialists	Indirect evidence	Culver City, CA, United StatesHQ checked Sep 24, 2026	5,001-10,000	2,500 contacts →
	Indirect evidence “The industry leader in security, Security Industry Specialists offers unique solutions to Fortune 500 companies, international events, and celebrity clients.” Source: RevenueBase Database · checked Sep 24, 2026
20	Knowbe4	Indirect evidence	Clearwater, FL, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,367 contacts →
	Indirect evidence “KnowBe4 empowers the modern workforce to make smarter security decisions every day.” Source: RevenueBase Database · checked Sep 24, 2026
21	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 24, 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 24, 2026
22	Tenable	Partial evidence	Columbia, MD, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,173 contacts →
	Partial evidence “Tenable is the exposure management company, exposing and closing the cybersecurity gaps that erode business value, reputation and trust.” Source: RevenueBase Database · checked Sep 24, 2026
23	RSA Security	Indirect evidence	Burlington, MA, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,163 contacts →
	Indirect evidence “The identity standard for government, finance, and high-assurance organizations.” Source: RevenueBase Database · checked Sep 24, 2026
24	Barracuda	Partial evidence	Campbell, CA, United StatesHQ checked Sep 24, 2026	1,001-5,000	2,157 contacts →
	Partial evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Sep 24, 2026
25	Paragon Systems INC	Partial evidence	Herndon, VA, United StatesHQ checked Sep 24, 2026	10001+	1,949 contacts →
	Partial evidence “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Source: RevenueBase Database · checked Sep 24, 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 consultancies. 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 consultancies.
Partial evidence: Its own public description names part of cybersecurity consultancies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity consultancies. 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 17,981 cybersecurity consultancies based in the United States

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Cybersecurity consultancies based in the United States at a glance

As of Sep 24, 2026

40.9%Verified-email coverage

33.8%Mobile-number coverage

24.1Average contacts per company

1-10Median size (employees)

3.4%Largest-city concentration · New York

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

10,136

11-50

5,467

51-200

1,648

201-500

402

501-1,000

132

1,001-5,000

114

5,001-10,000

10001+

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 26.0d

131,9880–30

40,10731–60

2,74861–90

18990–180

2,007180+

Company record updated

Median 80.0d

00–30

118,22431–60

199,94361–90

90,55390–180

24,070180+

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 consultancies, 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 consultancies”. 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 consultancies), 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 consultancies, 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, 177,039 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 24, 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 consultancies 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 consultancies, 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 consultancies are there based in the United States?

RevenueBase identified 17,981 cybersecurity consultancies 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?

Palo Alto Networks, headquartered in Santa Clara, tops this list with the largest team on record.

Which city has the most cybersecurity consultancies?

New York leads with 609 headquartered companies, followed by Washington (366) and Houston (303).

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 177,039 verified decision-maker contacts tracked across these 17,981 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 24, 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.