Company lists · Data verified August 2026

Top 25 Cybersecurity incident response based in the United States

Name: Cybersecurity incident response 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 1,629 companies tracked

There are 1,629 cybersecurity incident response headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 27,448 professional contacts across them, including 12,167 with verified work emails and 9,439 with mobile numbers. New York is the largest hub.

This list covers cybersecurity incident response 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.

1,629Companies

27,448Contacts tracked

12,167Verified emails

9,439Mobile numbers

Unlock all 1,629 companies Free account · no credit card · 2 minutes

The 25 largest cybersecurity incident response based in the United States

Ranked by team size

Top 25 of 1,629 cybersecurity incident response 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	OPTIV	Chantilly, VA	1,001-5,000	2,206	1,422
2	Bitdefender	Fort Lauderdale, FL	1,001-5,000	2,141	1,230
3	Guidepoint Security	Tampa, FL	1,001-5,000	1,234	809
4	Coalition, INC	San Francisco, CA	501-1,000	719	562
5	Ultraviolet Cyber	Phoenix, AZ	501-1,000	517	258
6	Securityhq	New York, NY	501-1,000	492	279
7	ARETE	New York, NY	201-500	462	301
8	Palo Alto Networks Unit 42	Santa Clara, CA	5,001-10,000	438	306
9	Kudelski Security	Irving, TX	201-500	404	201
10	RED Canary, A Zscaler Company	Denver, CO	201-500	402	270
11	Mnemonic	Redwood City, CA	201-500	345	9
12	Cipher A Prosegur Company	Miami, FL	201-500	294	70
13	Baxter Clewis Cybersecurity	Cedar Hill, TX	201-500	251	17
14	GM Sectec	Santurce	1,001-5,000	241	69
15	Netdata Cybersecurity	Miami, FL	201-500	209	78
16	Mindpoint Group, A Tyto Athene Company	Reston, VA	1,001-5,000	208	7
17	AGIO	Oklahoma City, OK	201-500	205	71
18	Tevora	Los Angeles, CA	201-500	196	138
19	Deepseas	n/a	201-500	185	132
20	Cyber Advisors	Maple Grove, MN	201-500	180	112
21	Stratascale	Charlotte, NC	201-500	173	86
22	Hitachi Cyber	Santa Clara, CA	501-1,000	161	58
23	At&t Cybersecurity	Dallas, TX	1,001-5,000	158	29
24	Cert Division At The Software Engineering Institute	Pittsburgh, PA	501-1,000	155	9
25	Ciso Global	Scottsdale, AZ	201-500	134	85

Showing 25 of 1,629 cybersecurity incident response based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 12,167 reachable decision-makers.

Free account · no credit card

See all 1,629 companies

Cybersecurity incident response based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 54 HQs

9,439Contacts with mobile numbers

25Emails re-verified in last 30 days

Companies by employee count

1-10

894

11-50

516

51-200

154

201-500

501-1,000

1,001-5,000

5,001-10,000

Cybersecurity incident response by metro

Metro	Companies
Cybersecurity incident response in New York	54
Cybersecurity incident response in Houston	34
Cybersecurity incident response in Washington	33
Cybersecurity incident response in Miami	32
Cybersecurity incident response in Dallas	29
Cybersecurity incident response in Chicago	28
Cybersecurity incident response in San Francisco	25

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 incident response”, 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; 25 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 incident response are there based in the United States?

There are 1,629 cybersecurity incident response headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

OPTIV, headquartered in Chantilly, tops this list with the largest team on record.

Which city has the most cybersecurity incident response?

New York leads with 54 headquartered companies, followed by Houston (34) and Washington (33).

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 12,167 verified decision-maker contacts tracked across these 1,629 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 1,629 cybersecurity incident response based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Cybersecurity incident response by geography

Browse the directory

Browse: Companies home · All United States lists · All Cybersecurity incident response 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.