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Company lists · Data refreshed September 2026

Top 25 Information security consulting firms based in the United States

Compiled by the RevenueBase Data Team Data refreshed Sep 3, 2026 8,547 companies tracked

RevenueBase identified 8,547 information security consulting firms headquartered in the United States as of September 2026 and tracks 92,425 professional contacts across them, including 34,163 with verified work emails and 35,112 with mobile numbers. New York is the largest hub.

This list covers information security consulting firms 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
8,547Companies
92,425Contacts tracked
34,163Verified emails
35,112Mobile numbers
Explore all 8,547 companies → Free signup · no credit card · 500 free credits

The 25 largest information security consulting firms based in the United States

Ranked by team size
Top 25 of 8,547 information security consulting firms 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 consulting firms: 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
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
2
Trace3Indirect evidence
Irvine, AZ, United StatesHQ checked Sep 3, 20261,001-5,0001,336

“Trace3 delivers business transformation.”

Source: company website · checked Sep 3, 2026
3
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
4
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
5
Brosnan Risk ConsultantsPartial evidence
Pearl River, CA, United StatesHQ checked Sep 3, 20265,001-10,0001,047

“Brosnan Risk Consultants, Ltd.(BRC) is a security risk management firm focusing on physical security, emergency security, disaster preparedness and recovery and management…”

Source: company website · checked Sep 3, 2026
6
PPCIndirect evidence
Trevose, PA, United StatesHQ checked Sep 3, 2026201-500981

“PPC is now part of DSA”

Source: company website · checked Sep 3, 2026
7
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
8
Buchanan TechnologiesPartial evidence
Grapevine, KS, United StatesHQ checked Sep 3, 2026501-1,000817

“As a leading IT consulting and outsourcing services firm, Buchanan Technologies helps organizations across North America turn their business technology into a powerful competitive…”

Source: company website · checked Sep 3, 2026
9
SDG CorporationIndirect evidence
Norwalk, CT, United StatesHQ checked Sep 3, 2026201-500661

“With more than 30 years of experience partnering with global enterprises on complex business and IT initiatives, SDG is a trusted provider of advisory, transformation, and managed…”

Source: company website · checked Sep 3, 2026
10
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
11
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
12
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
13
Xcelerate SolutionsIndirect evidence
Mclean, VA, United StatesHQ checked Sep 3, 20261,001-5,000445

“At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.”

Source: company website · checked Sep 3, 2026
14
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
15
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
16
Edgewater Federal Solutions, INCPartial evidence
Frederick, ID, United StatesHQ checked Sep 3, 2026501-1,000407

“Edgewater Federal Solutions was founded in 2002 with the mission of being the best IT consulting company possible for our government clients, our contracting partners and our…”

Source: company website · checked Sep 3, 2026
17
UpguardIndirect evidence
Mountain View, CA, United StatesHQ checked Sep 3, 2026201-500338

“UpGuard is the only platform that unifies cyber risk management across the vendor supply chain, attack surface, and human workforce.”

Source: company website · checked Sep 3, 2026
18
IANSPartial evidence
Boston, MA, United StatesHQ checked Sep 3, 202651-200324

“For the security practitioner caught between rapidly evolving threats and demanding executives, IANS Research is a clear-headed resource for decision-making and articulating risk.”

Source: company website · checked Sep 3, 2026
19
CTIIndirect evidence
Timonium, MD, United StatesHQ checked Sep 3, 2026n/a321

“Continental Technologies Inc (CTI) configures, distributes, designs and maintains technology solutions for customers around the globe and remains both privately-held and locally…”

Source: company website · checked Sep 3, 2026
20
Intelligent Technical SolutionsPartial evidence
Las Vegas, WA, United StatesHQ checked Sep 3, 2026201-500313

“Intelligent Technical Solutions is your trusted business partner for all your Cybersecurity, Managed and Co-managed IT support, Risk & Compliance, Data Analytics, and Consulting…”

Source: company website · checked Sep 3, 2026
21
K2 IntegrityIndirect evidence
New York, DC, United StatesHQ checked Sep 3, 2026201-500313

“K2 Integrity is a global risk management firm dedicated to helping organizations across both the public and private sectors protect their assets, reputation, and operations and…”

Source: company website · checked Sep 3, 2026
22
Security Risk AdvisorsPartial evidence
Philadelphia, PA, United StatesHQ checked Sep 3, 2026201-500311

“We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.”

Source: company website · checked Sep 3, 2026
23
LogicallyIndirect evidence
Dublin, CT, United StatesHQ checked Sep 3, 2026201-500307

“Welcome to Logically.”

Source: company website · checked Sep 3, 2026
24
Cipher A Prosegur CompanyIndirect evidence
Miami, FL, United StatesHQ checked Sep 3, 2026201-500294

“We are Cipher, a company from the Prosegur group specializing in Cybersecurity.”

Source: company website · checked Sep 3, 2026
25
FeditcPartial evidence
Rockville, TX, United StatesHQ checked Sep 3, 2026201-500291

“Founded in 2003, FEDITC, LLC is an ISO and CMMI level 3 certified cyber security, IT, and engineering services firm.”

Source: company website · checked Sep 3, 2026

Showing 25 of 8,547 information security consulting firms based in the United States

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Information security consulting firms based in the United States at a glance

As of Sep 3, 2026
1-10Median size (employees)
New YorkLargest hub · 265 HQs
35,112Contacts with mobile numbers
Sep 3, 2026Data refreshed

Companies by employee count

1-10
5,206
11-50
2,427
51-200
671
201-500
138
501-1,000
33
1,001-5,000
32
5,001-10,000
9
10001+
3

Verified emails by last verification

0–30
0
31–60
2,929
61–90
19,627
90–180
11,316
180+
291

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 consulting firms, 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 consulting firms”. 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 consulting firms, 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, 34,163 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 consulting firms by metro

Frequently asked

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

RevenueBase identified 8,547 information security consulting firms 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?

OPTIV, headquartered in Chantilly, tops this list with the largest team on record.

Which city has the most information security consulting firms?

New York leads with 265 headquartered companies, followed by Washington (172) and Houston (170).

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 34,163 verified decision-maker contacts tracked across these 8,547 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.

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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.

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