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Company lists · Data verified August 2026

Top 25 Cybersecurity consultancy companies based in the United States

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 8,085 companies tracked

There are 8,085 cybersecurity consultancy companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 124,060 professional contacts across them, including 43,780 with verified work emails and 40,175 with mobile numbers. New York is the largest hub.

This list covers cybersecurity consultancy 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.

8,085Companies
124,060Contacts tracked
43,780Verified emails
40,175Mobile numbers
Unlock all 8,085 companies Free account · no credit card · 2 minutes

The 25 largest cybersecurity consultancy companies based in the United States

Ranked by team size
Top 25 of 8,085 cybersecurity consultancy 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
5FortraEden Prairie, MN1,001-5,0001,6401,037
6Thales Cybersecurity ProductsAustin, TX1,001-5,0001,252645
7Guidepoint SecurityTampa, FL1,001-5,0001,234809
8ImpervaAustin, TX10001+1,211829
9Watchguard TechnologiesSeattle, WA1,001-5,0001,054631
10CoalfireChicago, IL1,001-5,000960613
11Telos CorporationLas Vegas, NV501-1,000636230
12VikingcloudChicago, IL1,001-5,000618436
13Planned Systems InternationalValparaiso, FL1,001-5,000608316
14LevelblueDallas, TX1,001-5,000582372
15Vc3Memphis, TN501-1,000517374
16Ultraviolet CyberPhoenix, AZ501-1,000517258
17SecurityhqNew York, NY501-1,000492279
18Xcelerate SolutionsMclean, VA1,001-5,0004458
19United Security, Inc. USIBoston, MA1,001-5,00040972
20Edgewater Federal Solutions, INCPocatello, ID501-1,000407222
21VMD CorpSacramento, CA501-1,0002516
22GM SectecSanturce1,001-5,00024169
23Hillstone NetworksSanta Clara, CA1,001-5,0002311
24Mindpoint Group, A Tyto Athene CompanyReston, VA1,001-5,0002087
25NtiretyAustin, TX1,001-5,000166134

Showing 25 of 8,085 cybersecurity consultancy companies based in the United States

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Cybersecurity consultancy companies based in the United States at a glance

As of Aug 28, 2026
1-10Median size (employees)
New YorkLargest hub · 260 HQs
40,175Contacts with mobile numbers
77Emails re-verified in last 30 days

Companies by employee count

1-10
4,776
11-50
2,376
51-200
675
201-500
128
501-1,000
39
1,001-5,000
42
10001+
11

Cybersecurity consultancy companies by metro

MetroCompanies
Cybersecurity consultancy companies in New York260
Cybersecurity consultancy companies in Washington168
Cybersecurity consultancy companies in Houston157
Cybersecurity consultancy companies in Atlanta147
Cybersecurity consultancy companies in Austin134
Cybersecurity consultancy companies in Dallas132
Cybersecurity consultancy companies in Miami126

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 consultancy 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; 77 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 consultancy companies are there based in the United States?

There are 8,085 cybersecurity consultancy 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 consultancy companies?

New York leads with 260 headquartered companies, followed by Washington (168) and Houston (157).

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 43,780 verified decision-maker contacts tracked across these 8,085 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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