Company lists · Data refreshed September 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 Data refreshed Sep 1, 2026 1,629 companies tracked

RevenueBase identified 1,629 cybersecurity incident response headquartered in the United States as of September 2026 and 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase Smart Search rating on every row Refreshed Sep 1, 2026 86% judged on-target in blind review

1,629Companies

27,448Contacts tracked

12,167Verified emails

9,439Mobile numbers

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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 refreshed Sep 1, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity incident response: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	OPTIV	Indirect evidence	Chantilly, VA, United States	1,001-5,000	2,206 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 1, 2026
2	Bitdefender	Strong evidence	Fort Lauderdale, FL, United States	1,001-5,000	2,141 contacts →
	Strong evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 1, 2026
3	Guidepoint Security	Partial evidence	Tampa, FL, United States	1,001-5,000	1,234 contacts →
	Partial evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 1, 2026
4	Coalition, INC	Indirect evidence	San Francisco, CA, United States	501-1,000	719 contacts →
	Indirect evidence “Coalition is the world's first Active Insurance provider designed to help prevent digital risk before it strikes.” Source: RevenueBase Database · checked Sep 1, 2026
5	Ultraviolet Cyber	Indirect evidence	Phoenix, AZ, United States	501-1,000	517 contacts →
	Indirect evidence “UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program.” Source: RevenueBase Database · checked Sep 1, 2026
6	Securityhq	Partial evidence	New York, NY, United States	501-1,000	492 contacts →
	Partial evidence “SecurityHQ, a global cybersecurity company pioneering Security Performance Engineering for stronger operational performance and resilience.” Source: RevenueBase Database · checked Sep 1, 2026
7	ARETE	Partial evidence	New York, NY, United States	201-500	462 contacts →
	Partial evidence “Arete helps organizations stay ahead of cyber threats with standardized, intelligence-led detection, response, resolution, and resilience capabilities.” Source: RevenueBase Database · checked Sep 1, 2026
8	Palo Alto Networks Unit 42	Strong evidence	Santa Clara, CA, United States	5,001-10,000	438 contacts →
	Strong evidence “Palo Alto Networks Unit 42 brings together world-renowned threat researchers with an elite team of incident responders and security consultants to create an intelligence-driven…” Source: RevenueBase Database · checked Sep 1, 2026
9	Kudelski Security	Partial evidence	Irving, TX, United States	201-500	404 contacts →
	Partial evidence “Kudelski Security is a premier cybersecurity solutions provider, working with the most security-conscious organizations in Europe and across the United States.” Source: RevenueBase Database · checked Sep 1, 2026
10	RED Canary, A Zscaler Company	Indirect evidence	Denver, CO, United States	201-500	402 contacts →
	Indirect evidence “Red Canary stops cyber threats no one else does, so organizations can fearlessly pursue their missions.” Source: RevenueBase Database · checked Sep 1, 2026
11	Mnemonic	Partial evidence	Redwood City, CA, United States	201-500	345 contacts →
	Partial evidence “With offices in Oslo, Stavanger, Trondheim, Stockholm, Copenhagen, Utrecht and London, we deliver cybersecurity services across Europe.” Source: RevenueBase Database · checked Sep 1, 2026
12	Cipher A Prosegur Company	Partial evidence	Miami, FL, United States	201-500	294 contacts →
	Partial evidence “We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Source: RevenueBase Database · checked Sep 1, 2026
13	Baxter Clewis Cybersecurity	Partial evidence	Cedar Hill, TX, United States	201-500	251 contacts →
	Partial evidence “Baxter Clewis Cybersecurity, we bring to the table a unique set of experiences that allow us to best serve your cybersecurity needs.” Source: RevenueBase Database · checked Sep 1, 2026
14	GM Sectec	Indirect evidence	Santurce, United States	1,001-5,000	241 contacts →
	Indirect evidence “GM Sectec is a multi-national organization laser focused on cyber defense, advisory and fraud prevention.” Source: RevenueBase Database · checked Sep 1, 2026
15	Netdata Cybersecurity	Partial evidence	Miami, FL, United States	201-500	209 contacts →
	Partial evidence “Netdata is a leading global cybersecurity services partner with more than 200 certified engineers and over 1,500 certifications, widely recognized as a partner of Palo Alto…” Source: RevenueBase Database · checked Sep 1, 2026
16	Mindpoint Group, A Tyto Athene Company	Indirect evidence	Reston, VA, United States	1,001-5,000	208 contacts →
	Indirect evidence “When it comes to Information Security Consulting, we are the team the specialists turn to.” Source: RevenueBase Database · checked Sep 1, 2026
17	AGIO	Partial evidence	Oklahoma City, OK, United States	201-500	205 contacts →
	Partial evidence “Agio is a hybrid cybersecurity and managed IT organization that combines predictive intelligence with human brilliance to empower clients with next-generation cyber protection and…” Source: RevenueBase Database · checked Sep 1, 2026
18	Tevora	Partial evidence	Los Angeles, CA, United States	201-500	196 contacts →
	Partial evidence “Founded in 2003, Tevora is a specialized management consultancy focused on cybersecurity, risk, and compliance services.” Source: RevenueBase Database · checked Sep 1, 2026
19	Deepseas	Indirect evidence	United States	201-500	185 contacts →
	Indirect evidence “With 30 years of experience in cyber defense, DeepSeas is trusted by nearly clients around the world, including Fortune 100 enterprises and mid-market organizations, municipality…” Source: RevenueBase Database · checked Sep 1, 2026
20	Cyber Advisors	Indirect evidence	Maple Grove, MN, United States	201-500	180 contacts →
	Indirect evidence “Cyber Advisors is a nationwide leader in cyber security, providing a comprehensive range of Offensive, Defensive, and Risk Management services.” Source: RevenueBase Database · checked Sep 1, 2026
21	Stratascale	Partial evidence	Charlotte, NC, United States	201-500	173 contacts →
	Partial evidence “Stratascale is a premier services company proudly operating as the cybersecurity division of SHI.” Source: RevenueBase Database · checked Sep 1, 2026
22	Hitachi Cyber	Indirect evidence	Santa Clara, CA, United States	501-1,000	161 contacts →
	Indirect evidence “Hitachi Systems Trusted Cyber Management Inc.” Source: RevenueBase Database · checked Sep 1, 2026
23	At&t Cybersecurity	Partial evidence	Dallas, TX, United States	1,001-5,000	158 contacts →
	Partial evidence “AT & T Cybersecurity’s Edge-to-Edge technologies provide phenomenal threat intelligence, collaborative defense, security without the seams, and solutions that fit your business.” Source: RevenueBase Database · checked Sep 1, 2026
24	Cert Division At The Software Engineering Institute	Strong evidence	Pittsburgh, PA, United States	501-1,000	155 contacts →
	Strong evidence “CERT® Mission: Anticipating and Solving the Nation’s Cybersecurity Challenges We were there for the first internet security incident and we’re still here 25 years later.” Source: RevenueBase Database · checked Sep 1, 2026
25	Ciso Global	Partial evidence	Scottsdale, AZ, United States	201-500	134 contacts →
	Partial evidence “CISO Global was designed from inception to bring talent together from cybersecurity, compliance, remediation, and secured managed services practice areas for a comprehensive…” Source: RevenueBase Database · checked Sep 1, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity incident response. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cybersecurity incident response.
Partial evidence: Its own public description names part of cybersecurity incident response, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity incident response. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

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

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Cybersecurity incident response based in the United States at a glance

As of Sep 1, 2026

44.3%Verified-email coverage

34.4%Mobile-number coverage

16.8Average contacts per company

1-10Median size (employees)

3.3%Largest-city concentration · New York

Sep 1, 2026Page data refreshed

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

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among cybersecurity incident response, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “cybersecurity incident response”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names cybersecurity incident response), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among cybersecurity incident response, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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: Every listed company carries at least one verified work email, 12,167 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 1, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Cybersecurity incident response by metro

Cybersecurity incident response in New York54
Cybersecurity incident response in Houston34
Cybersecurity incident response in Washington33
Cybersecurity incident response in Miami32
Cybersecurity incident response in Dallas29
Cybersecurity incident response in Chicago28
Cybersecurity incident response in San Francisco25

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names cybersecurity incident response, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many cybersecurity incident response are there based in the United States?

RevenueBase identified 1,629 cybersecurity incident response headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

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 refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 1, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.