Company lists · Data verified August 2026

Top 25 Cybersecurity services companies based in the United States

Name: Cybersecurity services companies 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 7,340 companies tracked

There are 7,340 cybersecurity services companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 144,669 professional contacts across them, including 57,687 with verified work emails and 47,437 with mobile numbers. New York is the largest hub.

This list covers cybersecurity services 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.

7,340Companies

144,669Contacts tracked

57,687Verified emails

47,437Mobile numbers

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The 25 largest cybersecurity services companies based in the United States

Ranked by team size

Top 25 of 7,340 cybersecurity services 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.
#	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	Sentinelone	Mountain View, CA	1,001-5,000	3,046	1,926
4	OPTIV	Chantilly, VA	1,001-5,000	2,206	1,422
5	Bitdefender	Fort Lauderdale, FL	1,001-5,000	2,141	1,230
6	Barracuda	Alpharetta, GA	1,001-5,000	2,108	1,463
7	Fortra	Eden Prairie, MN	1,001-5,000	1,640	1,037
8	Reliaquest	Sandy, UT	1,001-5,000	1,252	980
9	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
10	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
11	Imperva	Austin, TX	10001+	1,211	829
12	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
13	Coalfire	Chicago, IL	1,001-5,000	960	613
14	Bitsight	Raleigh, NC	501-1,000	753	158
15	Huntress	Columbia, MD	501-1,000	694	135
16	Telos Corporation	Las Vegas, NV	501-1,000	636	230
17	Vikingcloud	Chicago, IL	1,001-5,000	618	436
18	Levelblue	Dallas, TX	1,001-5,000	582	372
19	Securityscorecard	New York, NY	501-1,000	529	5
20	Vc3	Memphis, TN	501-1,000	517	374
21	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258
22	Securityhq	New York, NY	501-1,000	492	279
23	XTIUM	New York, NY	501-1,000	475	123
24	Meriplex	Aurora, CO	501-1,000	444	320
25	DUO Security	Austin, TX	501-1,000	429	21

Showing 25 of 7,340 cybersecurity services companies based in the United States

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Cybersecurity services companies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 238 HQs

47,437Contacts with mobile numbers

108Emails re-verified in last 30 days

Companies by employee count

1-10

4,100

11-50

2,299

51-200

672

201-500

136

501-1,000

1,001-5,000

10001+

Cybersecurity services companies by metro

Metro	Companies
Cybersecurity services companies in New York	238
Cybersecurity services companies in Houston	144
Cybersecurity services companies in Washington	132
Cybersecurity services companies in Miami	129
Cybersecurity services companies in Austin	125
Cybersecurity services companies in Atlanta	123
Cybersecurity services companies in Chicago	113

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 services 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; 108 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 services companies are there based in the United States?

There are 7,340 cybersecurity services 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 services companies?

New York leads with 238 headquartered companies, followed by Houston (144) and Washington (132).

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 57,687 verified decision-maker contacts tracked across these 7,340 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.