Company lists · Data verified August 2026

Top 25 Cybersecurity staffing based in the United States

Name: Cybersecurity staffing 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 4,187 companies tracked

There are 4,187 cybersecurity staffing headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 94,560 professional contacts across them, including 32,620 with verified work emails and 27,149 with mobile numbers. New York is the largest hub.

This list covers cybersecurity staffing 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.

4,187Companies

94,560Contacts tracked

32,620Verified emails

27,149Mobile numbers

Unlock all 4,187 companies Free account · no credit card · 2 minutes

The 25 largest cybersecurity staffing based in the United States

Ranked by team size

Top 25 of 4,187 cybersecurity staffing 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	Barracuda	Alpharetta, GA	1,001-5,000	2,108	1,463
6	Fortra	Eden Prairie, MN	1,001-5,000	1,640	1,037
7	Reliaquest	Sandy, UT	1,001-5,000	1,252	980
8	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
9	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
10	Imperva	Austin, TX	10001+	1,211	829
11	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
12	Telos Corporation	Las Vegas, NV	501-1,000	636	230
13	Vc3	Memphis, TN	501-1,000	517	374
14	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258
15	Securityhq	New York, NY	501-1,000	492	279
16	DUO Security	Austin, TX	501-1,000	429	21
17	United Security, Inc. USI	Boston, MA	1,001-5,000	409	72
18	Markon	Falls Church, VA	501-1,000	271	137
19	GM Sectec	Santurce	1,001-5,000	241	69
20	AGB Investigative Services	Brookfield, WI	501-1,000	239	126
21	Hillstone Networks	Santa Clara, CA	1,001-5,000	231	1
22	Mindpoint Group, A Tyto Athene Company	Reston, VA	1,001-5,000	208	7
23	Acts-Aviation Security	Des Plaines, IL	1,001-5,000	203	39
24	Alert Logic	Eden Prairie, MN	501-1,000	176	105
25	Hitachi Cyber	Santa Clara, CA	501-1,000	161	58

Showing 25 of 4,187 cybersecurity staffing based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 32,620 reachable decision-makers.

Free account · no credit card

See all 4,187 companies

Cybersecurity staffing based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 135 HQs

27,149Contacts with mobile numbers

70Emails re-verified in last 30 days

Companies by employee count

1-10

2,281

11-50

1,320

51-200

393

201-500

102

501-1,000

1,001-5,000

10001+

Cybersecurity staffing by metro

Metro	Companies
Cybersecurity staffing in New York	135
Cybersecurity staffing in Atlanta	81
Cybersecurity staffing in Austin	79
Cybersecurity staffing in Washington	79
Cybersecurity staffing in Houston	71
Cybersecurity staffing in Chicago	70
Cybersecurity staffing in Dallas	70

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 staffing”, 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 staffing are there based in the United States?

There are 4,187 cybersecurity staffing 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 staffing?

New York leads with 135 headquartered companies, followed by Atlanta (81) and Austin (79).

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 32,620 verified decision-maker contacts tracked across these 4,187 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.

Ready to reach these companies? Verified emails and direct dials for all 4,187 cybersecurity staffing based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Cybersecurity staffing by geography

Browse the directory

Browse: Companies home · All United States lists · All Cybersecurity staffing lists · New lists

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.