Company lists · Data refreshed September 2026

Top 25 Cybersecurity and data protection companies based in the United States

Name: Cybersecurity and data protection companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 5,869 companies tracked

RevenueBase identified 5,869 cybersecurity and data protection companies headquartered in the United States as of September 2026 and tracks 217,436 professional contacts across them, including 104,787 with verified work emails. New York is the largest hub.

This list covers cybersecurity and data protection 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. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 28, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

5,869Companies

217,436Contacts tracked

104,787Verified emails

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The 25 largest cybersecurity and data protection companies based in the United States

Ranked by team size

Top 25 of 5,869 cybersecurity and data protection companies based in the United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity and data protection companies: 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	Palo Alto Networks	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	10001+	18,431 contacts →
	Partial evidence “Palo Alto Networks, the global cybersecurity leader, is shaping the cloud-centric future with technology that is transforming the way people and organizations operate.” Source: RevenueBase Database · checked Sep 28, 2026
2	Fortinet	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 28, 2026	10001+	14,289 contacts →
	Partial evidence “Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: RevenueBase Database · checked Sep 28, 2026
3	Symantec	Strong evidence	San Jose, CA, United StatesHQ checked Sep 28, 2026	10001+	11,169 contacts →
	Strong evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 28, 2026
4	Crowdstrike	Strong evidence	Remote, United StatesHQ checked Sep 28, 2026	5,001-10,000	10,118 contacts →
	Strong evidence “CrowdStrike (Nasdaq: CRWD), a global cybersecurity leader, has redefined modern security with the world’s most advanced cloud-native platform for protecting critical areas of…” Source: RevenueBase Database · checked Sep 28, 2026
5	Veeam Software	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	5,001-10,000	6,262 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
6	Cohesity	Partial evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,962 contacts →
	Partial evidence “A modern platform for the AI era Our mission at Cohesity is simple: to protect, secure, and provide insights into the world’s data.” Source: RevenueBase Database · checked Sep 28, 2026
7	Rubrik	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,448 contacts →
	Strong evidence “Rubrik (NYSE: RBRK), the Security and AI company, operates at the intersection of data protection, cyber resilience and enterprise AI acceleration.” Source: RevenueBase Database · checked Sep 28, 2026
8	Commvault	Indirect evidence	Tinton Falls, NJ, United StatesHQ checked Sep 28, 2026	1,001-5,000	4,032 contacts →
	Indirect evidence “Commvault (NASDAQ: CVLT) is a leader in unified resilience at enterprise scale.” Source: RevenueBase Database · checked Sep 28, 2026
9	Bugcrowd	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	n/a	3,649 contacts →
	Indirect evidence “We are a crowdsourced security company that safeguards organizations' assets from sophisticated threat actors before they can strike-by uniting our customers with trusted hackers…” Source: RevenueBase Database · checked Sep 28, 2026
10	Trellix	Partial evidence	Plano, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,447 contacts →
	Partial evidence “Trellix is a global cybersecurity company delivering intelligence-led cyber resilience for security-conscious organizations at any stage of their journey.” Source: RevenueBase Database · checked Sep 28, 2026
11	Quest Software	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,206 contacts →
	Indirect evidence “At Quest Software, we help organizations build modern, trusted foundations for AI.” Source: RevenueBase Database · checked Sep 28, 2026
12	Sentinelone	Partial evidence	Mountain View, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	3,052 contacts →
	Partial evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Sep 28, 2026
13	Entrust	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,907 contacts →
	Partial evidence “Entrust fights fraud and cyber threats with identity-centric security that protects people, devices, and data.” Source: RevenueBase Database · checked Sep 28, 2026
14	Sailpoint	Partial evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,886 contacts →
	Partial evidence “SailPoint equips the modern enterprise to seamlessly manage and secure access to applications and data through the lens of identity – at speed and scale.” Source: RevenueBase Database · checked Sep 28, 2026
15	Rapid7	Partial evidence	Boston, MA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,822 contacts →
	Partial evidence “Rapid7, Inc.(NASDAQ: RPD) is a global leader in AI-powered managed cybersecurity operations, trusted to advance organizations’ cyber resilience.” Source: RevenueBase Database · checked Sep 28, 2026
16	Varonis	Partial evidence	Miami, FL, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,715 contacts →
	Partial evidence “Varonis unifies AI-native data security, AI security and governance, and behavior-based threat detection.” Source: RevenueBase Database · checked Sep 28, 2026
17	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,222 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 28, 2026
18	Avepoint	Strong evidence	Jersey City, NJ, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,199 contacts →
	Strong evidence “AvePoint is the global leader in data protection, unifying data security, governance, and resilience to provide a trusted foundation for AI.” Source: RevenueBase Database · checked Sep 28, 2026
19	Barracuda	Strong evidence	Campbell, CA, United StatesHQ checked Sep 28, 2026	1,001-5,000	2,157 contacts →
	Strong evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Sep 28, 2026
20	N-Able	Indirect evidence	Morrisville, NC, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,903 contacts →
	Indirect evidence “N-able’s mission is to protect businesses against evolving cyberthreats with a unified cyber resiliency platform to manage, secure, and recover.” Source: RevenueBase Database · checked Sep 28, 2026
21	Beyondtrust	Strong evidence	Johns Creek, GA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,669 contacts →
	Strong evidence “BeyondTrust is the global cybersecurity leader protecting Paths to Privilege™.” Source: RevenueBase Database · checked Sep 28, 2026
22	Fortra	Strong evidence	Eden Prairie, MN, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,648 contacts →
	Strong evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 28, 2026
23	Forcepoint	Indirect evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,636 contacts →
	Indirect evidence “Forcepoint simplifies security for global businesses and governments.” Source: RevenueBase Database · checked Sep 28, 2026
24	Thales Cybersecurity Products	Strong evidence	Austin, TX, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,252 contacts →
	Strong evidence “Thales is a global leader in cybersecurity, helping the most trusted organizations in the world protect their most critical applications, data, and identities anywhere at scale.” Source: RevenueBase Database · checked Sep 28, 2026
25	Guidepoint Security	Partial evidence	Reston, VA, United StatesHQ checked Sep 28, 2026	1,001-5,000	1,232 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 28, 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 and data protection companies. 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 and data protection companies.
Partial evidence: Its own public description names part of cybersecurity and data protection companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity and data protection companies. 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 5,869 cybersecurity and data protection companies based in the United States

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Cybersecurity and data protection companies based in the United States at a glance

As of Sep 28, 2026

48.2%Verified-email coverage

37.0Average contacts per company

1-10Median size (employees)

3.5%Largest-city concentration · New York

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

3,120

11-50

1,877

51-200

587

201-500

142

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 5,869 companies.

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 and data protection companies, 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 and data protection companies”. 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 and data protection companies), 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 and data protection companies, 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, 104,787 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 28, 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 and data protection companies by metro

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 and data protection companies, 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 and data protection companies are there based in the United States?

RevenueBase identified 5,869 cybersecurity and data protection companies 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?

Palo Alto Networks, headquartered in Santa Clara, tops this list with the largest team on record.

Which city has the most cybersecurity and data protection companies?

New York leads with 203 headquartered companies, followed by Austin (120) and Atlanta (106).

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 104,787 verified decision-maker contacts tracked across these 5,869 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 28, 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.