Company lists · Data refreshed August 2026

Top 25 Computer security companies based in the United States

Name: Computer security companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 1,193 companies tracked

RevenueBase identified 1,193 computer security companies headquartered in the United States as of August 2026 and tracks 55,772 professional contacts across them, including 21,487 with verified work emails and 13,287 with mobile numbers. New York is the largest hub.

This list covers computer security 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 August 31, 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 Aug 31, 2026 86% judged on-target in blind review

1,193Companies

55,772Contacts tracked

21,487Verified emails

13,287Mobile numbers

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The 25 largest computer security companies based in the United States

Ranked by team size

Top 25 of 1,193 computer security companies based in the United States, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to computer security 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	Symantec	Partial evidence	San Jose, CA, United States	10001+	11,179 contacts →
	Partial evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Aug 31, 2026
2	Bugcrowd	Partial evidence	San Francisco, CA, United States	n/a	3,566 contacts →
	Partial 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 Aug 31, 2026
3	Sentinelone	Indirect evidence	Mountain View, CA, United States	1,001-5,000	3,046 contacts →
	Indirect evidence “SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: RevenueBase Database · checked Aug 31, 2026
4	Bitdefender	Indirect evidence	Fort Lauderdale, FL, United States	1,001-5,000	2,141 contacts →
	Indirect evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Aug 31, 2026
5	Barracuda	Indirect evidence	Alpharetta, GA, United States	1,001-5,000	2,108 contacts →
	Indirect evidence “Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.” Source: RevenueBase Database · checked Aug 31, 2026
6	Thales Cybersecurity Products	Indirect evidence	Austin, TX, United States	1,001-5,000	1,252 contacts →
	Indirect 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 Aug 31, 2026
7	Imperva	Indirect evidence	Austin, TX, United States	10001+	1,211 contacts →
	Indirect evidence “On Dec.” Source: RevenueBase Database · checked Aug 31, 2026
8	Watchguard Technologies	Indirect evidence	Seattle, WA, United States	1,001-5,000	1,054 contacts →
	Indirect evidence “WatchGuard® Technologies, Inc.” Source: RevenueBase Database · checked Aug 31, 2026
9	Absolute Security	Partial evidence	Seattle, WA, United States	501-1,000	789 contacts →
	Partial evidence “Absolute Security is partnered with more than 28 of the world’s leading endpoint device manufacturers, embedded in the firmware of 600 million devices, trusted by global…” Source: RevenueBase Database · checked Aug 31, 2026
10	Huntress	Indirect evidence	Columbia, MD, United States	501-1,000	694 contacts →
	Indirect evidence “Protect Your Endpoints, Identities, Logs, and Employees.” Source: RevenueBase Database · checked Aug 31, 2026
11	Fireeye, INC	Indirect evidence	Milpitas, CA, United States	1,001-5,000	679 contacts →
	Indirect evidence “We are now officially Trellix!” Source: RevenueBase Database · checked Aug 31, 2026
12	Guidance Software	Indirect evidence	Las Vegas, NV, United States	501-1,000	496 contacts →
	Indirect evidence “Guidance (NASDAQ: GUID) exists to turn chaos and the unknown into order and the known-so that companies and their customers can go about their daily lives as usual without worry…” Source: RevenueBase Database · checked Aug 31, 2026
13	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 Aug 31, 2026
14	DUO Security	Partial evidence	Austin, TX, United States	501-1,000	429 contacts →
	Partial evidence “We are Duo, and we’re here to democratize security.” Source: RevenueBase Database · checked Aug 31, 2026
15	K7 Computing	Strong evidence	Cerritos, CA, United States	201-500	358 contacts →
	Strong evidence “K7 Computing is a global cyber security pioneer with over 30 year’s expertise in the cyber security industry.” Source: RevenueBase Database · checked Aug 31, 2026
16	Cipher A Prosegur Company	Indirect evidence	Miami, FL, United States	201-500	294 contacts →
	Indirect evidence “We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Source: RevenueBase Database · checked Aug 31, 2026
17	CYBLE	Partial evidence	Cupertino, CA, United States	201-500	267 contacts →
	Partial evidence “Cyble is the world’s first intelligence-driven, AI-native security platform that brings together detection, protection, and remediation across the entire digital attack surface.” Source: RevenueBase Database · checked Aug 31, 2026
18	Hillstone Networks	Partial evidence	Santa Clara, CA, United States	1,001-5,000	231 contacts →
	Partial evidence “Hillstone Networks’ Integrative Cyber Security approach delivers coverage, control, and consolidation to secure digital transformation for more than enterprises worldwide.” Source: RevenueBase Database · checked Aug 31, 2026
19	Arkose Labs	Indirect evidence	San Mateo, CA, United States	201-500	221 contacts →
	Indirect evidence “Arkose Labs helps the biggest enterprises in the world-including top banks, tech giants, social media platforms, airlines, etc-protect their users, revenue and reputation from…” Source: RevenueBase Database · checked Aug 31, 2026
20	Netdata Cybersecurity	Indirect evidence	Miami, FL, United States	201-500	209 contacts →
	Indirect 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 Aug 31, 2026
21	Xcitium	Partial evidence	Remote, United States	501-1,000	172 contacts →
	Partial evidence “Prevention-First Cybersecurity Powered by Patented ZeroDwell Containment Xcitium (formerly Comodo Security Solutions) is redefining cybersecurity with a prevention-first approach.” Source: RevenueBase Database · checked Aug 31, 2026
22	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 Aug 31, 2026
23	Sq1 Security	Partial evidence	San Jose, CA, United States	201-500	149 contacts →
	Partial evidence “SQ1 Security is a global cybersecurity leader offering end-to-end cybersecurity and compliance solution.” Source: RevenueBase Database · checked Aug 31, 2026
24	Helpsystems	Indirect evidence	Eden Prairie, MN, United States	1,001-5,000	132 contacts →
	Indirect evidence “HelpSystems has long been known for helping organizations become more secure and autonomous.” Source: RevenueBase Database · checked Aug 31, 2026
25	Tripwire	Indirect evidence	Portland, OR, United States	201-500	127 contacts →
	Indirect evidence “Tripwire is proud to be part of Fortra’s comprehensive cybersecurity portfolio.” Source: RevenueBase Database · checked Aug 31, 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: computer security 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 computer security companies.
Partial evidence: Its own public description names part of computer security companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name computer security 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 1,193 computer security companies based in the United States

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Computer security companies based in the United States at a glance

As of Aug 31, 2026

38.5%Verified-email coverage

23.8%Mobile-number coverage

46.7Average contacts per company

1-10Median size (employees)

3.3%Largest-city concentration · New York

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

592

11-50

402

51-200

123

201-500

501-1,000

1,001-5,000

10001+

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 computer security 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 “computer security 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 computer security 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 computer security 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, 21,487 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 August 31, 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.

Computer security companies by metro

Computer security companies in New York39
Computer security companies in Miami28

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 computer security 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 computer security companies are there based in the United States?

RevenueBase identified 1,193 computer security companies headquartered in the United States as of August 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?

Symantec, headquartered in San Jose, tops this list with the largest team on record.

Which city has the most computer security companies?

New York leads with 39 headquartered companies, followed by Miami (28) and San Francisco (22).

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 21,487 verified decision-maker contacts tracked across these 1,193 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.