Company lists · Data refreshed September 2026

Top 25 Cybersecurity companies for critical infrastructure based in the United States

Name: Cybersecurity companies for critical infrastructure based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 2,997 companies tracked

RevenueBase identified 2,997 company matches for cybersecurity companies for critical infrastructure associated with the United States as of September 2026 and tracks 102,702 professional contacts across them, including 49,699 with verified work emails. New York is the largest hub.

This list covers company matches for cybersecurity companies for critical infrastructure 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 28, 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 28, 2026 How this list was built

2,997Companies

102,702Contacts tracked

49,699Verified emails

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The 25 largest cybersecurity companies for critical infrastructure based in the United States

Ranked by team size

Top 25 of 2,997 company matches for cybersecurity companies for critical infrastructure based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 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 Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
2	Fortinet	Exact match	Sunnyvale, CA, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
3	Trellix	Exact match	Plano, TX, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
4	Rapid7	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
5	OPTIV	Exact match	Leawood, KS, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
6	Barracuda	Exact match	Campbell, CA, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
7	Paragon Systems INC	Exact match	Herndon, VA, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
8	N-Able	Exact match	Morrisville, NC, United StatesHQ recorded Sep 28, 2026	1,001-5,000	1,903 contacts →
	Exact match “N-able’s mission is to protect businesses against evolving cyberthreats with a unified cyber resiliency platform to manage, secure, and recover.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9	Fortra	Exact match	Eden Prairie, MN, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
10	Thales Cybersecurity Products	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
11	Guidepoint Security	Exact match	Reston, VA, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
12	Imperva	Exact match	Austin, TX, United StatesHQ recorded Sep 28, 2026	10001+	1,217 contacts →
	Exact match “On Dec.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13	Opswat	Exact match	Tampa, FL, United StatesHQ recorded Sep 28, 2026	501-1,000	1,119 contacts →
	Exact match “OPSWAT protects critical infrastructure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14	Coalfire	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
15	Trustwave, A Levelblue Company	Exact match	Chicago, IL, United StatesHQ recorded Sep 28, 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 · Sep 28, 2026 · View company records in RevenueBase
16	Cyderes	Exact match	Kansas City, MO, United StatesHQ recorded Sep 28, 2026	1,001-5,000	844 contacts →
	Exact match “Today’s threatscape is relentless.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17	Bitsight	Exact match	Boston, MA, United StatesHQ recorded Sep 28, 2026	501-1,000	752 contacts →
	Exact match “Bitsight is the global leader in cyber risk intelligence, leveraging advanced AI to empower organizations with precise insights derived from the industry’s most extensive external…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18	Claroty	Exact match	New York, NY, United StatesHQ recorded Sep 28, 2026	501-1,000	725 contacts →
	Exact match “Claroty has redefined cyber-physical systems (CPS) protection with an unrivaled industry-centric platform built to secure mission-critical infrastructure.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19	Vectra AI	Exact match	San Jose, CA, United StatesHQ recorded Sep 28, 2026	501-1,000	651 contacts →
	Exact match “Vectra AI is the cybersecurity AI leader in protecting modern networks from modern attacks.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20	Telos Corporation	Exact match	Ashburn, VA, United StatesHQ recorded Sep 28, 2026	501-1,000	629 contacts →
	Exact match “Telos Corporation (NASDAQ: TLS) empowers and protects the world’s most security-conscious organizations with efficient, adaptable, and secure solutions that safeguard people…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21	Comodo	Exact match	Bloomfield, NJ, United StatesHQ recorded Sep 28, 2026	51-200	566 contacts →
	Exact match “Comodo - Protecting Your Digital World At Comodo, we are dedicated to safeguarding your digital property with Comodo Website Security.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22	Dragos, INC	Exact match	Hanover, MD, United StatesHQ recorded Sep 28, 2026	501-1,000	551 contacts →
	Exact match “Dragos provides the most effective OT cybersecurity technology for industrial and critical infrastructure to deliver on our global mission: to safeguard civilization.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23	Ultraviolet Cyber	Exact match	Mclean, VA, United StatesHQ recorded Sep 28, 2026	501-1,000	523 contacts →
	Exact match “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24	Aujas Cybersecurity	Exact match	Cupertino, CA, United StatesHQ recorded Sep 28, 2026	1,001-5,000	473 contacts →
	Exact match “At Aujas Cybersecurity, we specialize in building and transforming cybersecurity postures to help businesses effectively mitigate risks.” Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25	ARETE	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 28, 2026	201-500	462 contacts →
	Exact match “Arete helps organizations stay ahead of cyber threats with standardized, intelligence-led detection, response, resolution, and resilience capabilities.” Recorded in the RevenueBase company graph · Sep 28, 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 companies for critical infrastructure”. 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 2,997 cybersecurity companies for critical infrastructure based in the United States

See the full list, filter by size, metro and specialty, and access 49,699 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity companies for critical infrastructure based in the United States at a glance

As of Sep 28, 2026

48.4%Verified-email coverage

34.3Average contacts per company

1-10Median size (employees)

3.0%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

1,550

11-50

991

51-200

320

201-500

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 2,997 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 companies for critical infrastructure” 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 49,699 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 28, 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 companies for critical infrastructure 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 companies for critical infrastructure”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity companies for critical infrastructure are there based in the United States?

RevenueBase identified 2,997 company matches for cybersecurity companies for critical infrastructure 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?

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 companies for critical infrastructure?

New York leads with 91 company records, followed by Washington (63) and Houston (62).

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 49,699 professional contacts with verified work emails tracked across these 2,997 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 28, 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.