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Company lists · Data refreshed September 2026

Top 24 Information security companies based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 5,605 companies tracked

RevenueBase identified 5,605 information security companies headquartered in the United States as of September 2026 and tracks 105,321 professional contacts across them, including 37,110 with verified work emails and 32,039 with mobile numbers. New York is the largest hub.

This list covers information security companies 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, how directly it supports the match, and when it was last checked. Data refreshed September 3, 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 HQ checked on every row Match evidence on every row Refreshed Sep 3, 2026 86% judged on-target in blind review
5,605Companies
105,321Contacts tracked
37,110Verified emails
32,039Mobile numbers
Unlock all 5,605 companies Free signup · no credit card · 500 free credits

The 24 largest information security companies based in the United States

Ranked by team size
Top 24 of 5,605 information security companies based in the United States, ranked by team size, largest first. Data refreshed Sep 3, 2026. Evidence rates how directly each company's own description names information security companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
SymantecPartial evidence
San Jose, CA, United StatesHQ checked Sep 3, 202610001+11,179

“Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.”

Source: company website · checked Sep 3, 2026
2
BugcrowdPartial evidence
San Francisco, CA, United StatesHQ checked Sep 3, 2026n/a3,566

“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: company website · checked Sep 3, 2026
3
TrellixPartial evidence
Plano, TX, United StatesHQ checked Sep 3, 20261,001-5,0003,490

“Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.”

Source: company website · checked Sep 3, 2026
4
OPTIVIndirect evidence
Leawood, VA, United StatesHQ checked Sep 3, 20261,001-5,0002,206

“Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.”

Source: company website · checked Sep 3, 2026
5
BarracudaIndirect evidence
Campbell, GA, United StatesHQ checked Sep 3, 20261,001-5,0002,108

“Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.”

Source: company website · checked Sep 3, 2026
6
FortraIndirect evidence
Eden Prairie, MN, United StatesHQ checked Sep 3, 20261,001-5,0001,640

“Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.”

Source: company website · checked Sep 3, 2026
7
Thales Cybersecurity ProductsIndirect evidence
Austin, TX, United StatesHQ checked Sep 3, 20261,001-5,0001,252

“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: company website · checked Sep 3, 2026
8
Guidepoint SecurityPartial evidence
Reston, FL, United StatesHQ checked Sep 3, 20261,001-5,0001,234

“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.”

Source: company website · checked Sep 3, 2026
9
DRUVAPartial evidence
Santa Clara, CO, United StatesHQ checked Sep 3, 20261,001-5,0001,213

“Druva is the leading provider of data security solutions, empowering customers to secure and recover their data from all threats.”

Source: company website · checked Sep 3, 2026
10
ImpervaIndirect evidence
Austin, TX, United StatesHQ checked Sep 3, 202610001+1,211

“On Dec.”

Source: company website · checked Sep 3, 2026
11
Watchguard TechnologiesIndirect evidence
Seattle, WA, United StatesHQ checked Sep 3, 20261,001-5,0001,054

“WatchGuard® Technologies, Inc.”

Source: company website · checked Sep 3, 2026
12
PPCIndirect evidence
Trevose, PA, United StatesHQ checked Sep 3, 2026201-500981

“PPC is now part of DSA”

Source: company website · checked Sep 3, 2026
13
CoalfireIndirect evidence
Chicago, IL, United StatesHQ checked Sep 3, 20261,001-5,000960

“Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.”

Source: company website · checked Sep 3, 2026
14
Application Specialist Kompany ASKIndirect evidence
Lansing, MI, United StatesHQ checked Sep 3, 2026n/a785

“ASK is now Convergence Networks!”

Source: company website · checked Sep 3, 2026
15
HuntressIndirect evidence
Columbia, MD, United StatesHQ checked Sep 3, 2026501-1,000694

“Protect Your Endpoints, Identities, Logs, and Employees.”

Source: company website · checked Sep 3, 2026
16
Telos CorporationStrong evidence
Ashburn, NV, United StatesHQ checked Sep 3, 2026501-1,000636

“Telos empowers and protects the world’s most security-conscious organizations with solutions for continuous security assurance of individuals, systems, and information.”

Source: company website · checked Sep 3, 2026
17
VikingcloudIndirect evidence
Chicago, IL, United StatesHQ checked Sep 3, 20261,001-5,000618

“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.”

Source: company website · checked Sep 3, 2026
18
NICIndirect evidence
Los Angeles, CA, United StatesHQ checked Sep 3, 2026n/a578

“NIC has been providing IT Solutions, Cybersecurity, and Cloud Services for businesses and organizations for the past two decades.”

Source: company website · checked Sep 3, 2026
19
ComodoPartial evidence
Bloomfield, NJ, United StatesHQ checked Sep 3, 202651-200568

“Comodo - Protecting Your Digital World At Comodo, we are dedicated to safeguarding your digital property with Comodo Website Security.”

Source: company website · checked Sep 3, 2026
20
Ultraviolet CyberPartial evidence
Mclean, AZ, United StatesHQ checked Sep 3, 2026501-1,000517

“UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.”

Source: company website · checked Sep 3, 2026
21
Blue MantisPartial evidence
Portsmouth, MA, United StatesHQ checked Sep 3, 2026201-500511

“Blue Mantis is a security-first, IT solutions and services provider with a 30+ year history of successfully helping clients achieve business modernization by applying…”

Source: company website · checked Sep 3, 2026
22
Palo Alto Networks Unit 42Partial evidence
Santa Clara, CA, United StatesHQ checked Sep 3, 20265,001-10,000438

“Palo Alto Networks Unit 42 brings together world-renowned threat researchers with an elite team of incident responders and security consultants to create an intelligence-driven…”

Source: company website · checked Sep 3, 2026
23
DUO SecurityPartial evidence
Ann Arbor, TX, United StatesHQ checked Sep 3, 2026501-1,000429

“We are Duo, and we’re here to democratize security.”

Source: company website · checked Sep 3, 2026
24
United Security, Inc. USIPartial evidence
Red Bank, MA, United StatesHQ checked Sep 3, 20261,001-5,000409

“United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.”

Source: company website · checked Sep 3, 2026

Showing 24 of 5,605 information security companies based in the United States

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Information security companies based in the United States at a glance

As of Sep 3, 2026
1-10Median size (employees)
New YorkLargest hub · 172 HQs
32,039Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
3,113
11-50
1,783
51-200
499
201-500
104
501-1,000
34
1,001-5,000
32
5,001-10,000
8
10001+
7

Verified emails by last verification

0–30
0
31–60
3,409
61–90
21,137
90–180
12,274
180+
290

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 information security companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “information security companies”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among information security companies, 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 an evidence 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, 37,110 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 3, 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.

Information security companies by metro

Frequently asked

How many information security companies are there based in the United States?

RevenueBase identified 5,605 information security companies 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?

Symantec, headquartered in San Jose, tops this list with the largest team on record.

Which city has the most information security companies?

New York leads with 172 headquartered companies, followed by Houston (102) and Atlanta (98).

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 37,110 verified decision-maker contacts tracked across these 5,605 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 3, 2026.

Ready to reach these companies? Verified emails and direct dials for all 5,605 information security companies based in the United States. Start with a free account, no credit card.

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Related lists

Browse: Companies home · All United States lists · All Information security companies lists · New lists

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.

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