Company lists · Data verified August 2026

Top 25 Cybersecurity threat detection companies based in the United States

Name: Cybersecurity threat detection 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 1,997 companies tracked

There are 1,997 cybersecurity threat detection companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 104,706 professional contacts across them, including 47,441 with verified work emails and 28,711 with mobile numbers. New York is the largest hub.

This list covers cybersecurity threat detection 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.

1,997Companies

104,706Contacts tracked

47,441Verified emails

28,711Mobile numbers

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The 25 largest cybersecurity threat detection companies based in the United States

Ranked by team size

Top 25 of 1,997 cybersecurity threat detection 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	Qualys	Foster City, CA	1,001-5,000	3,042	2,121
5	Infoblox	Tacoma, WA	1,001-5,000	2,808	1,604
6	Varonis	Scottsdale, AZ	1,001-5,000	2,741	1,673
7	Ivanti	San Jose	1,001-5,000	2,666	1,783
8	Bitdefender	Fort Lauderdale, FL	1,001-5,000	2,141	1,230
9	Barracuda	Alpharetta, GA	1,001-5,000	2,108	1,463
10	Fortra	Eden Prairie, MN	1,001-5,000	1,640	1,037
11	Reliaquest	Sandy, UT	1,001-5,000	1,252	980
12	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
13	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
14	Imperva	Austin, TX	10001+	1,211	829
15	Forescout Technologies INC	San Jose, CA	1,001-5,000	1,165	841
16	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
17	Netenrich	San Jose, CA	501-1,000	885	261
18	Exabeam	Broomfield, CO	501-1,000	873	465
19	Sumo Logic	Redwood City, CA	501-1,000	843	397
20	Bitsight	Raleigh, NC	501-1,000	753	158
21	Securonix	Plano, TX	501-1,000	700	312
22	Huntress	Columbia, MD	501-1,000	694	135
23	Sysdig	San Francisco, CA	501-1,000	653	407
24	Vikingcloud	Chicago, IL	1,001-5,000	618	436
25	Dragos, INC	Houston, TX	501-1,000	544	382

Showing 25 of 1,997 cybersecurity threat detection companies based in the United States

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Cybersecurity threat detection companies based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 88 HQs

28,711Contacts with mobile numbers

95Emails re-verified in last 30 days

Companies by employee count

1-10

829

11-50

703

51-200

312

201-500

501-1,000

1,001-5,000

10001+

Cybersecurity threat detection companies by metro

Metro	Companies
Cybersecurity threat detection companies in New York	88
Cybersecurity threat detection companies in San Francisco	62
Cybersecurity threat detection companies in Miami	45
Cybersecurity threat detection companies in Austin	43
Cybersecurity threat detection companies in Houston	34
Cybersecurity threat detection companies in Boston	34
Cybersecurity threat detection companies in Dallas	31

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 threat detection 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; 95 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 threat detection companies are there based in the United States?

There are 1,997 cybersecurity threat detection 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 threat detection companies?

New York leads with 88 headquartered companies, followed by San Francisco (62) and Miami (45).

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 47,441 verified decision-maker contacts tracked across these 1,997 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.