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Company lists · Data verified August 2026

Top 25 Cybersecurity consulting companies based in the United States

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 7,619 companies tracked

There are 7,619 cybersecurity consulting companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 112,024 professional contacts across them, including 38,549 with verified work emails and 35,905 with mobile numbers. New York is the largest hub.

This list covers cybersecurity consulting companies 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.

7,619Companies
112,024Contacts tracked
38,549Verified emails
35,905Mobile numbers
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The 25 largest cybersecurity consulting companies based in the United States

Ranked by team size
Top 25 of 7,619 cybersecurity consulting companies 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.
#CompanyHQEmployeesContactsVerified emails
1SymantecSan Jose, CA10001+11,179876
2TrellixPlano, TX1,001-5,0003,4901,633
3OPTIVChantilly, VA1,001-5,0002,2061,422
4BitdefenderFort Lauderdale, FL1,001-5,0002,1411,230
5Thales Cybersecurity ProductsAustin, TX1,001-5,0001,252645
6Guidepoint SecurityTampa, FL1,001-5,0001,234809
7ImpervaAustin, TX10001+1,211829
8CoalfireChicago, IL1,001-5,000960613
9Telos CorporationLas Vegas, NV501-1,000636230
10VikingcloudChicago, IL1,001-5,000618436
11Vc3Memphis, TN501-1,000517374
12Ultraviolet CyberPhoenix, AZ501-1,000517258
13SecurityhqNew York, NY501-1,000492279
14United Security, Inc. USIBoston, MA1,001-5,00040972
15Edgewater Federal Solutions, INCPocatello, ID501-1,000407222
16VMD CorpSacramento, CA501-1,0002516
17GM SectecSanturce1,001-5,00024169
18Hillstone NetworksSanta Clara, CA1,001-5,0002311
19Mindpoint Group, A Tyto Athene CompanyReston, VA1,001-5,0002087
20Stroz Friedberg, A Levelblue CompanyNew York, NY501-1,00020467
21NtiretyAustin, TX1,001-5,000166134
22Hitachi CyberSanta Clara, CA501-1,00016158
23At&t CybersecurityDallas, TX1,001-5,00015829
24HelpsystemsEden Prairie, MN1,001-5,00013227
25PDI Security And Network SolutionsAlpharetta, GA1,001-5,00012565

Showing 25 of 7,619 cybersecurity consulting companies based in the United States

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Cybersecurity consulting companies based in the United States at a glance

As of Aug 28, 2026
1-10Median size (employees)
New YorkLargest hub · 239 HQs
35,905Contacts with mobile numbers
70Emails re-verified in last 30 days

Companies by employee count

1-10
4,543
11-50
2,223
51-200
621
201-500
117
501-1,000
34
1,001-5,000
35
10001+
10

Cybersecurity consulting companies by metro

MetroCompanies
Cybersecurity consulting companies in New York239
Cybersecurity consulting companies in Washington152
Cybersecurity consulting companies in Houston145
Cybersecurity consulting companies in Atlanta144
Cybersecurity consulting companies in Dallas122
Cybersecurity consulting companies in Austin121
Cybersecurity consulting companies in Miami120

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 companies”, 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; 70 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 companies are there based in the United States?

There are 7,619 cybersecurity consulting companies 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 companies?

New York leads with 239 headquartered companies, followed by Washington (152) and Houston (145).

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 38,549 verified decision-maker contacts tracked across these 7,619 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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Related lists

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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.

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