Company lists · Data verified August 2026

Top 25 Cybersecurity consulting agencies based in the United States

Name: Cybersecurity consulting agencies 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 8,344 companies tracked

There are 8,344 cybersecurity consulting agencies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 125,087 professional contacts across them, including 42,297 with verified work emails and 41,809 with mobile numbers. New York is the largest hub.

This list covers cybersecurity consulting agencies 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.

8,344Companies

125,087Contacts tracked

42,297Verified emails

41,809Mobile numbers

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The 25 largest cybersecurity consulting agencies based in the United States

Ranked by team size

Top 25 of 8,344 cybersecurity consulting agencies 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	Paragon Systems INC	Herndon, VA	10001+	1,946	75
6	Reliaquest	Sandy, UT	1,001-5,000	1,252	980
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	Telos Corporation	Las Vegas, NV	501-1,000	636	230
12	Vikingcloud	Chicago, IL	1,001-5,000	618	436
13	Planned Systems International	Valparaiso, FL	1,001-5,000	608	316
14	Levelblue	Dallas, TX	1,001-5,000	582	372
15	Vc3	Memphis, TN	501-1,000	517	374
16	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258
17	Securityhq	New York, NY	501-1,000	492	279
18	Xcelerate Solutions	Mclean, VA	1,001-5,000	445	8
19	United Security, Inc. USI	Boston, MA	1,001-5,000	409	72
20	Edgewater Federal Solutions, INC	Pocatello, ID	501-1,000	407	222
21	Macaulay-Brown, Inc. Macb , An Alion Company	Dayton, OH	1,001-5,000	382	11
22	Markon	Falls Church, VA	501-1,000	271	137
23	VMD Corp	Sacramento, CA	501-1,000	251	6
24	GM Sectec	Santurce	1,001-5,000	241	69
25	Tricorps	Oklahoma City, OK	501-1,000	232	23

Showing 25 of 8,344 cybersecurity consulting agencies based in the United States

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Cybersecurity consulting agencies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 255 HQs

41,809Contacts with mobile numbers

78Emails re-verified in last 30 days

Companies by employee count

1-10

4,955

11-50

2,429

51-200

697

201-500

131

501-1,000

1,001-5,000

10001+

Cybersecurity consulting agencies by metro

Metro	Companies
Cybersecurity consulting agencies in New York	255
Cybersecurity consulting agencies in Washington	179
Cybersecurity consulting agencies in Atlanta	153
Cybersecurity consulting agencies in Houston	150
Cybersecurity consulting agencies in Austin	138
Cybersecurity consulting agencies in Miami	129
Cybersecurity consulting agencies in Dallas	128

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 agencies”, 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; 78 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 agencies are there based in the United States?

There are 8,344 cybersecurity consulting agencies 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 agencies?

New York leads with 255 headquartered companies, followed by Washington (179) and Atlanta (153).

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 42,297 verified decision-maker contacts tracked across these 8,344 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.