Company lists · Data refreshed September 2026

Top 25 Cybersecurity staffing based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 1, 2026 4,187 companies tracked

RevenueBase identified 4,187 company matches for cybersecurity staffing associated with the United States as of September 2026 and tracks 94,560 professional contacts across them, including 32,620 with verified work emails and 27,149 with mobile numbers. New York is the largest hub.

This list covers company matches for cybersecurity staffing associated with the United States, 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 1, 2026.

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 1, 2026 How this list was built

4,187Companies

94,560Contacts tracked

32,620Verified emails

27,149Mobile numbers

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The 25 largest cybersecurity staffing based in the United States

Ranked by team size

Top 25 of 4,187 company matches for cybersecurity staffing based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 1, 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	Symantec	Exact match	San Jose, CA, United States	10001+	11,179 contacts →
	Exact match “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
2	Trellix	Exact match	Plano, TX, United States	1,001-5,000	3,490 contacts →
	Exact match “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
3	OPTIV	Exact match	Chantilly, VA, United States	1,001-5,000	2,206 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 1, 2026 · View company records in RevenueBase
4	Bitdefender	Exact match	Fort Lauderdale, FL, United States	1,001-5,000	2,141 contacts →
	Exact match “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
5	Barracuda	Exact match	Alpharetta, GA, United States	1,001-5,000	2,108 contacts →
	Exact match “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
6	Fortra	Exact match	Eden Prairie, MN, United States	1,001-5,000	1,640 contacts →
	Exact match “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
7	Reliaquest	Exact match	Sandy, UT, United States	1,001-5,000	1,252 contacts →
	Exact match “ReliaQuest exists to Make Security Possible.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
8	Thales Cybersecurity Products	Exact match	Austin, TX, United States	1,001-5,000	1,252 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
9	Guidepoint Security	Exact match	Tampa, FL, United States	1,001-5,000	1,234 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 1, 2026 · View company records in RevenueBase
10	Imperva	Exact match	Austin, TX, United States	10001+	1,211 contacts →
	Exact match “On Dec.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
11	Watchguard Technologies	Exact match	Seattle, WA, United States	1,001-5,000	1,054 contacts →
	Exact match “WatchGuard® Technologies, Inc.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
12	Telos Corporation	Exact match	Las Vegas, NV, United States	501-1,000	636 contacts →
	Exact match “Telos empowers and protects the world’s most security-conscious organizations with solutions for continuous security assurance of individuals, systems, and information.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
13	Vc3	Exact match	Memphis, TN, United States	501-1,000	517 contacts →
	Exact match “VC3 is a managed IT and cybersecurity services provider serving organizations throughout the US and Canada.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
14	Ultraviolet Cyber	Exact match	Phoenix, AZ, United States	501-1,000	517 contacts →
	Exact match “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
15	Securityhq	Exact match	New York, NY, United States	501-1,000	492 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 1, 2026 · View company records in RevenueBase
16	DUO Security	Exact match	Austin, TX, United States	501-1,000	429 contacts →
	Exact match “We are Duo, and we’re here to democratize security.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
17	United Security, Inc. USI	Exact match	Boston, MA, United States	1,001-5,000	409 contacts →
	Exact match “United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
18	Markon	Exact match	Falls Church, VA, United States	501-1,000	271 contacts →
	Exact match “Markon is the leader across full-spectrum cyber and technology-enabled solutions for the most critical national security priorities.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
19	GM Sectec	Exact match	Santurce, United States	1,001-5,000	241 contacts →
	Exact match “GM Sectec is a multi-national organization laser focused on cyber defense, advisory and fraud prevention.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
20	AGB Investigative Services	Exact match	Brookfield, WI, United States	501-1,000	239 contacts →
	Exact match “AGB is the largest black-owned, award winning security firm that opened in Chicago in 2001 and has grown to 1300+ employees.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
21	Hillstone Networks	Exact match	Santa Clara, CA, United States	1,001-5,000	231 contacts →
	Exact match “Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
22	Mindpoint Group, A Tyto Athene Company	Exact match	Reston, VA, United States	1,001-5,000	208 contacts →
	Exact match “When it comes to Information Security Consulting, we are the team the specialists turn to.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
23	Acts-Aviation Security	Exact match	Des Plaines, IL, United States	1,001-5,000	203 contacts →
	Exact match “As the U.S.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
24	Alert Logic	Exact match	Eden Prairie, MN, United States	501-1,000	176 contacts →
	Exact match “Alert Logic, a LevelBlue company, helps organizations detect threats earlier, respond faster, and reduce cyber risk across modern IT environments.” Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
25	Hitachi Cyber	Exact match	Santa Clara, CA, United States	501-1,000	161 contacts →
	Exact match “Hitachi Systems Trusted Cyber Management Inc.” Recorded in the RevenueBase company graph · Sep 1, 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 “cybersecurity staffing”. 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 4,187 cybersecurity staffing based in the United States

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Cybersecurity staffing based in the United States at a glance

As of Sep 1, 2026

34.5%Verified-email coverage

28.7%Mobile-number coverage

22.6Average contacts per company

1-10Median size (employees)

3.2%Largest-city concentration · New York

Sep 1, 2026Page data refreshed

Companies by employee count

1-10

2,281

11-50

1,320

51-200

393

201-500

102

501-1,000

1,001-5,000

10001+

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.
What qualifies: Company records associated with the United States whose business descriptions match “cybersecurity staffing” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 32,620 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 1, 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.

Cybersecurity staffing by metro

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 “cybersecurity staffing”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity staffing are there based in the United States?

RevenueBase identified 4,187 company matches for cybersecurity staffing associated with the United States 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?

Symantec tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most cybersecurity staffing?

New York leads with 135 company records, followed by Atlanta (81) and Austin (79).

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 32,620 professional contacts with verified work emails tracked across these 4,187 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 1, 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.