Company lists · Data verified August 2026

Top 25 Cybersecurity consulting firms based in the United States

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 8,724 companies tracked

There are 8,724 cybersecurity consulting firms headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 129,143 professional contacts across them, including 45,312 with verified work emails and 42,659 with mobile numbers. New York is the largest hub.

This list covers cybersecurity 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. Data current as of August 28, 2026.

8,724Companies

129,143Contacts tracked

45,312Verified emails

42,659Mobile numbers

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The 25 largest cybersecurity consulting firms based in the United States

Ranked by team size

Top 25 of 8,724 cybersecurity consulting firms based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Symantec	San Jose, CA	10001+	11,179	876
2	Trellix	Plano, TX	1,001-5,000	3,490	1,633
3	OPTIV	Chantilly, VA	1,001-5,000	2,206	1,422
4	Bitdefender	Fort Lauderdale, FL	1,001-5,000	2,141	1,230
5	Beyondtrust	Johns Creek, GA	1,001-5,000	1,650	1,329
6	Fortra	Eden Prairie, MN	1,001-5,000	1,640	1,037
7	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
8	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
9	Imperva	Austin, TX	10001+	1,211	829
10	Coalfire	Chicago, IL	1,001-5,000	960	613
11	Buchanan Technologies	Wichita, KS	501-1,000	817	250
12	Telos Corporation	Las Vegas, NV	501-1,000	636	230
13	Vikingcloud	Chicago, IL	1,001-5,000	618	436
14	Vc3	Memphis, TN	501-1,000	517	374
15	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258
16	Securityhq	New York, NY	501-1,000	492	279
17	Xcelerate Solutions	Mclean, VA	1,001-5,000	445	8
18	United Security, Inc. USI	Boston, MA	1,001-5,000	409	72
19	Edgewater Federal Solutions, INC	Pocatello, ID	501-1,000	407	222
20	Markon	Falls Church, VA	501-1,000	271	137
21	VMD Corp	Sacramento, CA	501-1,000	251	6
22	GM Sectec	Santurce	1,001-5,000	241	69
23	Tricorps	Oklahoma City, OK	501-1,000	232	23
24	Hillstone Networks	Santa Clara, CA	1,001-5,000	231	1
25	Mindpoint Group, A Tyto Athene Company	Reston, VA	1,001-5,000	208	7

Showing 25 of 8,724 cybersecurity consulting firms based in the United States

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Cybersecurity consulting firms based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 285 HQs

42,659Contacts with mobile numbers

84Emails re-verified in last 30 days

Companies by employee count

1-10

5,211

11-50

2,532

51-200

714

201-500

140

501-1,000

1,001-5,000

10001+

Cybersecurity consulting firms by metro

Metro	Companies
Cybersecurity consulting firms in New York	285
Cybersecurity consulting firms in Washington	189
Cybersecurity consulting firms in Atlanta	172
Cybersecurity consulting firms in Houston	166
Cybersecurity consulting firms in Austin	145
Cybersecurity consulting firms in Dallas	132
Cybersecurity consulting firms in Chicago	131

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cybersecurity consulting firms”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 84 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 8,724 cybersecurity consulting firms headquartered in the United States as of August 2026 (RevenueBase).

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 cybersecurity consulting firms?

New York leads with 285 headquartered companies, followed by Washington (189) and Atlanta (172).

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 45,312 verified decision-maker contacts tracked across these 8,724 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.