Company lists · Data verified August 2026

Top 25 Cybersecurity service providers based in the United States

Name: Cybersecurity service providers 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 8,805 companies tracked

There are 8,805 cybersecurity service providers headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 161,848 professional contacts across them, including 65,126 with verified work emails and 54,874 with mobile numbers. New York is the largest hub.

This list covers cybersecurity service providers 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.

8,805Companies

161,848Contacts tracked

65,126Verified emails

54,874Mobile numbers

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The 25 largest cybersecurity service providers based in the United States

Ranked by team size

Top 25 of 8,805 cybersecurity service providers 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	OPTIV	Chantilly, VA	1,001-5,000	2,206	1,422
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	Fortra	Eden Prairie, MN	1,001-5,000	1,640	1,037
7	Thales Cybersecurity Products	Austin, TX	1,001-5,000	1,252	645
8	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
9	Imperva	Austin, TX	10001+	1,211	829
10	Watchguard Technologies	Seattle, WA	1,001-5,000	1,054	631
11	Coalfire	Chicago, IL	1,001-5,000	960	613
12	Netenrich	San Jose, CA	501-1,000	885	261
13	TPX	South San Francisco, CA	1,001-5,000	767	364
14	Bitsight	Raleigh, NC	501-1,000	753	158
15	Coalition, INC	San Francisco, CA	501-1,000	719	562
16	Huntress	Columbia, MD	501-1,000	694	135
17	IT Solutions	New Orleans, LA	501-1,000	680	217
18	Telos Corporation	Las Vegas, NV	501-1,000	636	230
19	Vikingcloud	Chicago, IL	1,001-5,000	618	436
20	Levelblue	Dallas, TX	1,001-5,000	582	372
21	Integris	Denver, CO	501-1,000	575	386
22	Dragos, INC	Houston, TX	501-1,000	544	382
23	Securityscorecard	New York, NY	501-1,000	529	5
24	Vc3	Memphis, TN	501-1,000	517	374
25	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258

Showing 25 of 8,805 cybersecurity service providers based in the United States

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Cybersecurity service providers based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 273 HQs

54,874Contacts with mobile numbers

124Emails re-verified in last 30 days

Companies by employee count

1-10

4,893

11-50

2,837

51-200

764

201-500

159

501-1,000

1,001-5,000

10001+

Cybersecurity service providers by metro

Metro	Companies
Cybersecurity service providers in New York	273
Cybersecurity service providers in Houston	165
Cybersecurity service providers in Miami	146
Cybersecurity service providers in Washington	144
Cybersecurity service providers in Atlanta	144
Cybersecurity service providers in Austin	143
Cybersecurity service providers in Dallas	129

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 service providers”, 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; 124 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 service providers are there based in the United States?

There are 8,805 cybersecurity service providers 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 service providers?

New York leads with 273 headquartered companies, followed by Houston (165) and Miami (146).

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 65,126 verified decision-maker contacts tracked across these 8,805 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.