Company lists · Data verified August 2026

Top 25 Cybersecurity software companies based in the United States

Name: Cybersecurity software 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 1,708 companies tracked

There are 1,708 cybersecurity software companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 77,176 professional contacts across them, including 31,593 with verified work emails and 20,236 with mobile numbers. New York is the largest hub.

This list covers cybersecurity software 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.

1,708Companies

77,176Contacts tracked

31,593Verified emails

20,236Mobile numbers

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The 25 largest cybersecurity software companies based in the United States

Ranked by team size

Top 25 of 1,708 cybersecurity software 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	Trellix	Plano, TX	1,001-5,000	3,490	1,633
4	Sentinelone	Mountain View, CA	1,001-5,000	3,046	1,926
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	Imperva	Austin, TX	10001+	1,211	829
11	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
12	Absolute Security	Seattle, WA	501-1,000	789	449
13	Telos Corporation	Las Vegas, NV	501-1,000	636	230
14	Vikingcloud	Chicago, IL	1,001-5,000	618	436
15	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258
16	Guidance Software	Las Vegas, NV	501-1,000	496	40
17	Securityhq	New York, NY	501-1,000	492	279
18	ARETE	New York, NY	201-500	462	301
19	DUO Security	Austin, TX	501-1,000	429	21
20	RED Canary, A Zscaler Company	Denver, CO	201-500	402	270
21	Novacoast	Arlington, TX	201-500	378	203
22	K7 Computing	Cerritos, CA	201-500	358	57
23	horizon3.ai	Durham, NC	201-500	356	246
24	Reversinglabs	Cambridge, MA	201-500	343	234
25	Sentar INC	San Antonio, TX	201-500	333	9

Showing 25 of 1,708 cybersecurity software companies based in the United States

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Cybersecurity software companies based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 65 HQs

20,236Contacts with mobile numbers

63Emails re-verified in last 30 days

Companies by employee count

1-10

790

11-50

596

51-200

204

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity software companies by metro

Metro	Companies
Cybersecurity software companies in New York	65
Cybersecurity software companies in San Francisco	41
Cybersecurity software companies in Miami	37
Cybersecurity software companies in Austin	35
Cybersecurity software companies in Chicago	34
Cybersecurity software companies in Houston	31
Cybersecurity software companies in Dallas	27

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 software 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; 63 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 software companies are there based in the United States?

There are 1,708 cybersecurity software 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 software companies?

New York leads with 65 headquartered companies, followed by San Francisco (41) and Miami (37).

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 31,593 verified decision-maker contacts tracked across these 1,708 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.