Company lists · Data verified August 2026

Top 25 Cybersecurity appliance manufacturers based in the United States

Name: Cybersecurity appliance manufacturers 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 216 companies tracked

There are 216 cybersecurity appliance manufacturers headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 24,399 professional contacts across them, including 7,250 with verified work emails and 4,227 with mobile numbers. New York is the largest hub.

This list covers cybersecurity appliance manufacturers 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.

216Companies

24,399Contacts tracked

7,250Verified emails

4,227Mobile numbers

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The 25 largest cybersecurity appliance manufacturers based in the United States

Ranked by team size

Top 25 of 216 cybersecurity appliance manufacturers 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	Bitdefender	Fort Lauderdale, FL	1,001-5,000	2,141	1,230
3	Barracuda	Alpharetta, GA	1,001-5,000	2,108	1,463
4	Imperva	Austin, TX	10001+	1,211	829
5	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
6	SSH Communications Security	New York, NY	51-200	590	105
7	Comodo	Bloomfield, NJ	51-200	568	40
8	3com	Marlborough, MA	5,001-10,000	317	15
9	Cynet Security	Boston, MA	201-500	304	225
10	Hillstone Networks	Santa Clara, CA	1,001-5,000	231	1
11	Vehere	San Francisco, CA	201-500	210	138
12	Fidelis Security	Riverside, CA	51-200	147	47
13	ESOFT	Broomfield, CO	51-200	140	2
14	PDI Security And Network Solutions	Alpharetta, GA	1,001-5,000	125	65
15	Threatdown	Santa Clara, CA	501-1,000	104	31
16	Zyston LLC	Dallas, TX	51-200	69	44
17	Sourcefire, Part Of Cisco	Columbia, MD	501-1,000	63	6
18	Concertium	Tampa, FL	11-50	55	28
19	firewalls.com	Indianapolis, IN	11-50	43	22
20	NLE	Orem, UT	11-50	42	2
21	dope.security	Mountain View, CA	11-50	34	22
22	Zentera Systems	Milpitas, CA	11-50	34	16
23	Fortuna Cysec	Atlanta, GA	51-200	33	14
24	Wedge Networks INC	Southlake, TX	11-50	30	20
25	Braxton-Grant Technologies, INC	Hanover, MD	11-50	30	15

Showing 25 of 216 cybersecurity appliance manufacturers based in the United States

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Cybersecurity appliance manufacturers based in the United States at a glance

As of Aug 28, 2026

11-50Median size (employees)

New YorkLargest hub · 10 HQs

4,227Contacts with mobile numbers

18Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Cybersecurity appliance manufacturers by metro

Metro	Companies
Cybersecurity appliance manufacturers in New York	10
Cybersecurity appliance manufacturers in Austin	6
Cybersecurity appliance manufacturers in San Jose	6
Cybersecurity appliance manufacturers in San Francisco	6
Cybersecurity appliance manufacturers in Atlanta	5
Cybersecurity appliance manufacturers in Alexandria	5
Cybersecurity appliance manufacturers in Dallas	5

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 appliance manufacturers”, 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; 18 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 appliance manufacturers are there based in the United States?

There are 216 cybersecurity appliance manufacturers 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 appliance manufacturers?

New York leads with 10 headquartered companies, followed by Austin (6) and San Jose (6).

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 7,250 verified decision-maker contacts tracked across these 216 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.