Company lists · Data verified August 2026

Top 25 Computer security companies based in the United States

Name: Computer security 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 1,193 companies tracked

There are 1,193 computer security companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 55,772 professional contacts across them, including 21,487 with verified work emails and 13,287 with mobile numbers. New York is the largest hub.

This list covers computer security 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.

1,193Companies

55,772Contacts tracked

21,487Verified emails

13,287Mobile numbers

Unlock all 1,193 companies Free account · no credit card · 2 minutes

The 25 largest computer security companies based in the United States

Ranked by team size

Top 25 of 1,193 computer security 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	Bugcrowd	San Francisco, CA	n/a	3,566	238
3	Sentinelone	Mountain View, CA	1,001-5,000	3,046	1,926
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	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
7	Imperva	Austin, TX	10001+	1,211	829
8	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
9	Absolute Security	Seattle, WA	501-1,000	789	449
10	Huntress	Columbia, MD	501-1,000	694	135
11	Fireeye, INC	Milpitas, CA	1,001-5,000	679	51
12	Guidance Software	Las Vegas, NV	501-1,000	496	40
13	Securityhq	New York, NY	501-1,000	492	279
14	DUO Security	Austin, TX	501-1,000	429	21
15	K7 Computing	Cerritos, CA	201-500	358	57
16	Cipher A Prosegur Company	Miami, FL	201-500	294	70
17	CYBLE	Cupertino, CA	201-500	267	125
18	Hillstone Networks	Santa Clara, CA	1,001-5,000	231	1
19	Arkose Labs	San Mateo, CA	201-500	221	121
20	Netdata Cybersecurity	Miami, FL	201-500	209	78
21	Xcitium	Remote	501-1,000	172	74
22	At&t Cybersecurity	Dallas, TX	1,001-5,000	158	29
23	Sq1 Security	San Jose, CA	201-500	149	10
24	Helpsystems	Eden Prairie, MN	1,001-5,000	132	27
25	Tripwire	Portland, OR	201-500	127	65

Showing 25 of 1,193 computer security companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 21,487 reachable decision-makers.

Free account · no credit card

See all 1,193 companies

Computer security companies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 39 HQs

13,287Contacts with mobile numbers

108Emails re-verified in last 30 days

Companies by employee count

1-10

592

11-50

402

51-200

123

201-500

501-1,000

1,001-5,000

10001+

Computer security companies by metro

Metro	Companies
Computer security companies in New York	39
Computer security companies in Miami	28
Computer security companies in San Francisco	22
Computer security companies in Houston	21
Computer security companies in Austin	19
Computer security companies in Dallas	17
Computer security companies in Los Angeles	16

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 “computer security 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 computer security companies are there based in the United States?

There are 1,193 computer security 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 computer security companies?

New York leads with 39 headquartered companies, followed by Miami (28) and San Francisco (22).

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 21,487 verified decision-maker contacts tracked across these 1,193 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 1,193 computer security companies based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Computer security companies by geography

Browse the directory

Browse: Companies home · All United States lists · All Computer security companies 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.