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, its RevenueBase Smart Search rating, 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 Smart Search, 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 RevenueBase Smart Search rating 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. RevenueBase Smart Search rates how each company's information relates to IT security consulting firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OPTIV	Indirect evidence	Leawood, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,206 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 4, 2026
2	Thales Cybersecurity Products	Indirect evidence	Austin, TX, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,252 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 4, 2026
3	Guidepoint Security	Partial evidence	Reston, FL, United StatesHQ checked Sep 4, 2026	1,001-5,000	1,234 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 4, 2026
4	PPC	Indirect evidence	Trevose, PA, United StatesHQ checked Sep 4, 2026	201-500	981 contacts →
	Indirect evidence “PPC is now part of DSA” Source: RevenueBase Database · checked Sep 4, 2026
5	Coalfire	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	960 contacts →
	Indirect evidence “Coalfire is the premier Cybersecurity and Compliance Services leader for the tech, healthcare, and finance industries.(This page is maintained by Marketing.” Source: RevenueBase Database · checked Sep 4, 2026
6	Buchanan Technologies	Strong evidence	Grapevine, KS, United StatesHQ checked Sep 4, 2026	501-1,000	817 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 4, 2026
7	Telos Corporation	Partial evidence	Ashburn, NV, United StatesHQ checked Sep 4, 2026	501-1,000	636 contacts →
	Partial evidence “Telos empowers and protects the world’s most security-conscious organizations with solutions for continuous security assurance of individuals, systems, and information.” Source: RevenueBase Database · checked Sep 4, 2026
8	Vikingcloud	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	618 contacts →
	Indirect evidence “VikingCloud delivers battle-tested cybersecurity and compliance solutions that simply work.” Source: RevenueBase Database · checked Sep 4, 2026
9	Ultraviolet Cyber	Partial evidence	Mclean, AZ, United StatesHQ checked Sep 4, 2026	501-1,000	517 contacts →
	Partial evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.” Source: RevenueBase Database · checked Sep 4, 2026
10	Xcelerate Solutions	Partial evidence	Mclean, VA, United StatesHQ checked Sep 4, 2026	1,001-5,000	445 contacts →
	Partial evidence “At Xcelerate, safeguarding the nation isn’t just a mission-it’s our obsession.” Source: RevenueBase Database · checked Sep 4, 2026
11	Palo Alto Networks Unit 42	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 4, 2026	5,001-10,000	438 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 4, 2026
12	United Security, Inc. USI	Partial evidence	Red Bank, MA, United StatesHQ checked Sep 4, 2026	1,001-5,000	409 contacts →
	Partial evidence “United Security Inc.(USI) provides personalized security solutions enhanced by advanced technology and cyber services.” Source: RevenueBase Database · checked Sep 4, 2026
13	Edgewater Federal Solutions, INC	Strong evidence	Frederick, ID, United StatesHQ checked Sep 4, 2026	501-1,000	407 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 4, 2026
14	IANS	Partial evidence	Boston, MA, United StatesHQ checked Sep 4, 2026	51-200	324 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 4, 2026
15	CTI	Indirect evidence	Timonium, MD, United StatesHQ checked Sep 4, 2026	n/a	321 contacts →
	Indirect evidence “Continental Technologies Inc (CTI) configures, distributes, designs and maintains technology solutions for customers around the globe and remains both privately-held and locally…” Source: RevenueBase Database · checked Sep 4, 2026
16	Intelligent Technical Solutions	Strong evidence	Las Vegas, WA, United StatesHQ checked Sep 4, 2026	201-500	313 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 4, 2026
17	Security Risk Advisors	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 4, 2026	201-500	311 contacts →
	Partial evidence “We deliver cybersecurity consulting, 24x7 operations and SaaS to leading companies in the Financial Services, Healthcare, Pharmaceuticals, Technology and Retail industries.” Source: RevenueBase Database · checked Sep 4, 2026
18	Logically	Indirect evidence	Dublin, CT, United StatesHQ checked Sep 4, 2026	201-500	307 contacts →
	Indirect evidence “Welcome to Logically.” Source: RevenueBase Database · checked Sep 4, 2026
19	Cipher A Prosegur Company	Indirect evidence	Miami, FL, United StatesHQ checked Sep 4, 2026	201-500	294 contacts →
	Indirect evidence “We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Source: RevenueBase Database · checked Sep 4, 2026
20	Feditc	Strong evidence	Rockville, TX, United StatesHQ checked Sep 4, 2026	201-500	291 contacts →
	Strong evidence “Founded in 2003, FEDITC, LLC is an ISO and CMMI level 3 certified cyber security, IT, and engineering services firm.” Source: RevenueBase Database · checked Sep 4, 2026
21	Brickred Systems	Strong evidence	Redmond, WA, United StatesHQ checked Sep 4, 2026	501-1,000	269 contacts →
	Strong evidence “BrickRed Systems is Microsoft Gold certified partner also one among the leading Information Technology (IT) Consulting firms of the present generation.” Source: RevenueBase Database · checked Sep 4, 2026
22	Prescient Security	Partial evidence	Nashville, TN, United StatesHQ checked Sep 4, 2026	201-500	266 contacts →
	Partial evidence “Prescient Security is a global cybersecurity and compliance firm delivering risk-based audits, advanced penetration testing, and end-to-end framework support.” Source: RevenueBase Database · checked Sep 4, 2026
23	Guidepost Solutions	Indirect evidence	New York, AZ, United StatesHQ checked Sep 4, 2026	201-500	263 contacts →
	Indirect evidence “We stand at the forefront of leadership, insight, and guidance in a world marked by complexity and uncertainty.” Source: RevenueBase Database · checked Sep 4, 2026
24	Orion Security Solutions	Partial evidence	Edmond, OK, United StatesHQ checked Sep 4, 2026	51-200	251 contacts →
	Partial evidence “Orion Security Systems (OSS) provides elite technical, physical, and cyber security solutions for customers with simple to complex needs.” Source: RevenueBase Database · checked Sep 4, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: IT security consulting firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names IT security consulting firms.
Partial evidence: Its own public description names part of IT security consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT security consulting firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

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

36.8%Verified-email coverage

37.5%Mobile-number coverage

10.4Average contacts per company

1-10Median size (employees)

3.1%Largest-city concentration · New York

Sep 4, 2026Page data 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+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

00–30

2,48931–60

15,83861–90

10,82990–180

239180+

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 RevenueBase Smart Search 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 Smart Search, 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.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names IT security consulting firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
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 its RevenueBase Smart Search 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

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names IT security consulting firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

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 Smart Search, 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.