Company lists · Data refreshed October 2026

Top 25 Cybersecurity services firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 8,254 companies tracked

RevenueBase identified 8,254 company matches for cybersecurity services firms associated with the United States as of October 2026 and tracks 195,147 professional contacts across them, including 81,366 with verified work emails. New York is the largest hub.

This list covers company matches for cybersecurity services firms 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 October 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 Oct 1, 2026 How this list was built

8,254Companies

195,147Contacts tracked

81,366Verified emails

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The 25 largest cybersecurity services firms based in the United States

Ranked by team size

Top 25 of 8,254 company matches for cybersecurity services firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 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	Palo Alto Networks	Exact match	Santa Clara, CA, United StatesHQ recorded Oct 1, 2026	10001+	18,431 contacts →
	Exact match “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Oct 1, 2026	10001+	14,289 contacts →
	Exact match “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	Symantec	Exact match	San Jose, CA, United StatesHQ recorded Oct 1, 2026	10001+	11,169 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 · Oct 1, 2026 · View company records in RevenueBase
4	Bugcrowd	Exact match	San Francisco, CA, United StatesHQ recorded Oct 1, 2026	n/a	3,649 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	Trellix	Exact match	Plano, TX, United StatesHQ recorded Oct 1, 2026	1,001-5,000	3,447 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 · Oct 1, 2026 · View company records in RevenueBase
6	Arctic Wolf	Exact match	Eden Prairie, MN, United StatesHQ recorded Oct 1, 2026	1,001-5,000	3,145 contacts →
	Exact match “Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Rapid7	Exact match	Boston, MA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,822 contacts →
	Exact match “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,222 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 · Oct 1, 2026 · View company records in RevenueBase
9	Barracuda	Exact match	Campbell, CA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	2,157 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 · Oct 1, 2026 · View company records in RevenueBase
10	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Oct 1, 2026	10001+	1,949 contacts →
	Exact match “Paragon Systems employs over 10,500 professionals in specialized operations providing security, fire, investigations, inspections, cybersecurity, risk management, and mission…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11	Beyondtrust	Exact match	Johns Creek, GA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,669 contacts →
	Exact match “BeyondTrust is the global cybersecurity leader protecting Paths to Privilege™.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12	Fortra	Exact match	Eden Prairie, MN, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,648 contacts →
	Exact match “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13	Reliaquest	Exact match	Tampa, FL, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,285 contacts →
	Exact match “ReliaQuest exists to Make Security Possible.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14	Thales Cybersecurity Products	Exact match	Austin, TX, United StatesHQ recorded Oct 1, 2026	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 · Oct 1, 2026 · View company records in RevenueBase
15	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,232 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 · Oct 1, 2026 · View company records in RevenueBase
16	Imperva	Exact match	Austin, TX, United StatesHQ recorded Oct 1, 2026	10001+	1,217 contacts →
	Exact match “On Dec.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17	Opswat	Exact match	Tampa, FL, United StatesHQ recorded Oct 1, 2026	501-1,000	1,119 contacts →
	Exact match “OPSWAT protects critical infrastructure.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18	Watchguard Technologies	Exact match	Seattle, WA, United StatesHQ recorded Oct 1, 2026	1,001-5,000	1,059 contacts →
	Exact match “WatchGuard® Technologies, Inc.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19	PPC	Exact match	Trevose, PA, United StatesHQ recorded Oct 1, 2026	201-500	979 contacts →
	Exact match “PPC is now part of DSA” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20	Coalfire	Exact match	Chicago, IL, United StatesHQ recorded Oct 1, 2026	1,001-5,000	947 contacts →
	Exact match “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21	Zerofox	Exact match	Baltimore, MD, United StatesHQ recorded Oct 1, 2026	501-1,000	904 contacts →
	Exact match “ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Oct 1, 2026	501-1,000	874 contacts →
	Exact match “Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
23	Cyderes	Exact match	Kansas City, MO, United StatesHQ recorded Oct 1, 2026	1,001-5,000	844 contacts →
	Exact match “Today’s threatscape is relentless.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
24	SSE	Exact match	St. Louis, MO, United StatesHQ recorded Oct 1, 2026	201-500	837 contacts →
	Exact match “Systems Service Enterprises, Inc.(SSE) is a leader in Information Technology, Cybersecurity Compliance, and Training and Technical Data solutions for small-medium sized businesses…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
25	Application Specialist Kompany ASK	Exact match	Lansing, MI, United StatesHQ recorded Oct 1, 2026	n/a	785 contacts →
	Exact match “ASK is now Convergence Networks!” Recorded in the RevenueBase company graph · Oct 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 services firms”. 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 8,254 cybersecurity services firms based in the United States

See the full list, filter by size, metro and specialty, and access 81,366 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity services firms based in the United States at a glance

As of Oct 1, 2026

41.7%Verified-email coverage

23.6Average contacts per company

1-10Median size (employees)

3.3%Largest-city concentration · New York

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

4,621

11-50

2,562

51-200

765

201-500

157

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 8,254 companies.

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 services firms” 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 81,366 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 October 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 services firms 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 services firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity services firms are there based in the United States?

RevenueBase identified 8,254 company matches for cybersecurity services firms associated with the United States as of October 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?

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

Which city has the most cybersecurity services firms?

New York leads with 276 company records, followed by Washington (154) and Austin (153).

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 81,366 professional contacts with verified work emails tracked across these 8,254 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 October 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.