Company lists · Data refreshed September 2026

Top 24 IT security consulting firms based in the United States

Name: IT security consulting firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 4, 2026 7,692 companies tracked

RevenueBase identified 7,692 IT security consulting firms headquartered in the United States as of September 2026 and tracks 79,796 professional contacts across them, including 29,395 with verified work emails and 29,909 with mobile numbers. New York is the largest hub.

This list covers IT 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 4, 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 4, 2026 86% judged on-target in blind review

7,692Companies

79,796Contacts tracked

29,395Verified emails

29,909Mobile numbers

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The 24 largest IT security consulting firms based in the United States

Ranked by team size

Top 24 of 7,692 IT security consulting firms based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names IT 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.
#	Company	Headquarters	Employees	Contacts
1	OPTIVIndirect evidence	Leawood, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,206
	“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 4, 2026
2	Thales Cybersecurity ProductsIndirect evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,252
	“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 4, 2026
3	Guidepoint SecurityPartial evidence	Reston, FL, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,234
	“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: company website · checked Sep 4, 2026
4	PPCIndirect evidence	Trevose, PA, United StatesHQ checked Sep 4, 2026	201-500	981
	“PPC is now part of DSA” Source: company website · checked Sep 4, 2026
5	CoalfireIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	960
	“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 4, 2026
6	Buchanan TechnologiesStrong evidence	Grapevine, KS, United StatesHQ checked Sep 4, 2026	501-1,000	817
	“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 4, 2026
7	Telos CorporationPartial evidence	Ashburn, NV, United StatesHQ checked Sep 4, 2026	501-1,000	636
	“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 4, 2026
8	VikingcloudIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	618
	“VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: company website · checked Sep 4, 2026
9	Ultraviolet CyberPartial evidence	Mclean, AZ, United StatesHQ checked Sep 4, 2026	501-1,000	517
	“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 4, 2026
10	Xcelerate SolutionsPartial evidence	Mclean, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	445
	“At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Source: company website · checked Sep 4, 2026
11	Palo Alto Networks Unit 42Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 4, 2026	5,001-10,000	438
	“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 4, 2026
12	United Security, Inc. USIPartial evidence	Red Bank, MA, United StatesHQ checked Sep 4, 2026	1,001-5,000	409
	“United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.” Source: company website · checked Sep 4, 2026
13	Edgewater Federal Solutions, INCStrong evidence	Frederick, ID, United StatesHQ checked Sep 4, 2026	501-1,000	407
	“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 4, 2026
14	IANSPartial evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	51-200	324
	“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 4, 2026
15	CTIIndirect evidence	Timonium, MD, United StatesHQ checked Sep 4, 2026	n/a	321
	“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 4, 2026
16	Intelligent Technical SolutionsStrong evidence	Las Vegas, WA, United StatesHQ checked Sep 4, 2026	201-500	313
	“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 4, 2026
17	Security Risk AdvisorsPartial evidence	Philadelphia, PA, United StatesHQ checked Sep 4, 2026	201-500	311
	“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 4, 2026
18	LogicallyIndirect evidence	Dublin, CT, United StatesHQ checked Sep 4, 2026	201-500	307
	“Welcome to Logically.” Source: company website · checked Sep 4, 2026
19	Cipher A Prosegur CompanyIndirect evidence	Miami, FL, United StatesHQ checked Sep 4, 2026	201-500	294
	“We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Source: company website · checked Sep 4, 2026
20	FeditcStrong evidence	Rockville, TX, United StatesHQ checked Sep 4, 2026	201-500	291
	“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 4, 2026
21	Brickred SystemsStrong evidence	Redmond, WA, United StatesHQ checked Sep 4, 2026	501-1,000	269
	“BrickRed Systems is Microsoft Gold certified partner also one among the leading Information Technology (IT) Consulting firms of the present generation.” Source: company website · checked Sep 4, 2026
22	Prescient SecurityPartial evidence	Nashville, TN, United StatesHQ checked Sep 4, 2026	201-500	266
	“Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: company website · checked Sep 4, 2026
23	Guidepost SolutionsIndirect evidence	New York, AZ, United StatesHQ checked Sep 4, 2026	201-500	263
	“We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: company website · checked Sep 4, 2026
24	Orion Security SolutionsPartial evidence	Edmond, OK, United StatesHQ checked Sep 4, 2026	51-200	251
	“Orion Security Systems (OSS) provides elite technical, physical, and cyber security solutions for customers with simple to complex needs.” Source: company website · checked Sep 4, 2026

Showing 24 of 7,692 IT security consulting firms based in the United States

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

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 239 HQs

29,909Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

4,653

11-50

2,250

51-200

574

201-500

121

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

31–60

2,489

61–90

15,838

90–180

10,829

180+

239

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 IT 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 “IT 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 IT 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, 29,395 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 4, 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.

IT security consulting firms by metro

Frequently asked

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

RevenueBase identified 7,692 IT 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 IT security consulting firms?

New York leads with 239 headquartered companies, followed by Houston (148) and Atlanta (139).

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 29,395 verified decision-maker contacts tracked across these 7,692 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 4, 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.