Company lists · Data verified August 2026

Top 25 Enterprise cybersecurity companies based in the United States

Name: Enterprise cybersecurity 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 5,546 companies tracked

There are 5,546 enterprise cybersecurity companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 161,273 professional contacts across them, including 70,493 with verified work emails and 50,275 with mobile numbers. New York is the largest hub.

This list covers enterprise cybersecurity 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.

5,546Companies

161,273Contacts tracked

70,493Verified emails

50,275Mobile numbers

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The 25 largest enterprise cybersecurity companies based in the United States

Ranked by team size

Top 25 of 5,546 enterprise cybersecurity 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	Rubrik	Reston, VA	1,001-5,000	4,381	2,545
3	Commvault	Tinton Falls, NJ	1,001-5,000	4,050	2,207
4	Trellix	Plano, TX	1,001-5,000	3,490	1,633
5	Sentinelone	Mountain View, CA	1,001-5,000	3,046	1,926
6	Qualys	Foster City, CA	1,001-5,000	3,042	2,121
7	Netskope	Santa Clara, CA	1,001-5,000	3,025	1,996
8	Varonis	Scottsdale, AZ	1,001-5,000	2,741	1,673
9	OPTIV	Chantilly, VA	1,001-5,000	2,206	1,422
10	Bitdefender	Fort Lauderdale, FL	1,001-5,000	2,141	1,230
11	Barracuda	Alpharetta, GA	1,001-5,000	2,108	1,463
12	Beyondtrust	Johns Creek, GA	1,001-5,000	1,650	1,329
13	Fortra	Eden Prairie, MN	1,001-5,000	1,640	1,037
14	Forcepoint	Austin, TX	1,001-5,000	1,620	1,084
15	Reliaquest	Sandy, UT	1,001-5,000	1,252	980
16	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
17	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
18	Imperva	Austin, TX	10001+	1,211	829
19	Forescout Technologies INC	San Jose, CA	1,001-5,000	1,165	841
20	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
21	Coalfire	Chicago, IL	1,001-5,000	960	613
22	Vikingcloud	Chicago, IL	1,001-5,000	618	436
23	United Security, Inc. USI	Boston, MA	1,001-5,000	409	72
24	Nsfocus	Santa Clara, CA	1,001-5,000	284	23
25	Keyw Corporation	Hanover, MD	1,001-5,000	267	10

Showing 25 of 5,546 enterprise cybersecurity companies based in the United States

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Enterprise cybersecurity companies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 190 HQs

50,275Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

2,820

11-50

1,870

51-200

585

201-500

130

501-1,000

1,001-5,000

10001+

Enterprise cybersecurity companies by metro

Metro	Companies
Enterprise cybersecurity companies in New York	190
Enterprise cybersecurity companies in Atlanta	105
Enterprise cybersecurity companies in Houston	102
Enterprise cybersecurity companies in Austin	101
Enterprise cybersecurity companies in Washington	101
Enterprise cybersecurity companies in Miami	96
Enterprise cybersecurity companies in San Francisco	94

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 “enterprise cybersecurity 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; 0 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 enterprise cybersecurity companies are there based in the United States?

There are 5,546 enterprise cybersecurity 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 enterprise cybersecurity companies?

New York leads with 190 headquartered companies, followed by Atlanta (105) and Houston (102).

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 70,493 verified decision-maker contacts tracked across these 5,546 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.