Company lists · Data refreshed September 2026

Top 25 Endpoint security firms based in the United States

RevenueBase identified 402 company matches for endpoint security firms associated with the United States as of September 2026 and tracks 32,679 professional contacts across them, including 11,138 with verified work emails. New York is the largest hub.

This list covers company matches for endpoint security firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
402Companies
32,679Contacts tracked
11,138Verified emails
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The 25 largest endpoint security firms based in the United States

Ranked by team size
Top 25 of 402 company matches for endpoint security firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Jose, CA, United StatesHQ recorded Sep 28, 202610001+11,169 contacts →

Exact match

“Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchRemote, United StatesHQ recorded Sep 28, 20265,001-10,00010,118 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchSan Francisco, CA, United StatesHQ recorded Sep 28, 2026n/a3,649 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchTampa, FL, United StatesHQ recorded Sep 28, 2026501-1,0001,119 contacts →

Exact match

“OPSWAT protects critical infrastructure.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchColumbia, MD, United StatesHQ recorded Sep 28, 2026501-1,000696 contacts →

Exact match

“Protect Your Endpoints, Identities, Logs, and Employees.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchPasadena, CA, United StatesHQ recorded Sep 28, 2026501-1,000492 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchIndianapolis, United StatesHQ recorded Sep 28, 202610001+302 contacts →

Exact match

“Sonitrol is the industry leader in verified electronic security and provides customers with a single source of integrated security solutions for intrusion, video, access and fire.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchColumbia, MD, United StatesHQ recorded Sep 28, 2026201-500253 contacts →

Exact match

“Owl Cyber Defense provides hardened network security checkpoints for absolute threat prevention and secure data availability through cross domain and data diode solutions.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchSanta Ana, CA, United StatesHQ recorded Sep 28, 2026201-500240 contacts →

Exact match

“Hirsch is a global leader in unified security solutions, helping enterprise and SMB organisations integrate perimeter security, intrusion detection, access control, video…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchSan Jose, CA, United StatesHQ recorded Sep 28, 2026201-500232 contacts →

Exact match

“Noname Security is the only company taking a complete, proactive approach to API Security.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchBroomfield, CO, United StatesHQ recorded Sep 28, 2026501-1,000199 contacts →

Exact match

“Webroot, an OpenText company, was the first to harness the cloud and artificial intelligence to stop zero-day threats in real time.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchSan Diego, CA, United StatesHQ recorded Sep 28, 202651-200180 contacts →

Exact match

“For more than 30 years we have been here helping to watch over and protect progress.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchRemote, United StatesHQ recorded Sep 28, 2026501-1,000171 contacts →

Exact match

“Prevention-First Cybersecurity Powered by Patented ZeroDwell Containment Xcitium (formerly Comodo Security Solutions) is redefining cybersecurity with a prevention-first approach.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchElmhurst, IL, United StatesHQ recorded Sep 28, 202651-200167 contacts →

Exact match

“DefendEdge is a leading US-based cybersecurity firm specializing in protecting clients' firewalls, endpoints, and applications against cyber threats and vulnerabilities.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchBroomfield, CO, United StatesHQ recorded Sep 28, 202651-200141 contacts →

Exact match

“eSoft is a leader in providing Simply Better Network Security™ to businesses of nearly any size.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchRedwood City, CA, United StatesHQ recorded Sep 28, 202651-200124 contacts →

Exact match

“Authentic8 helps intelligence and security teams investigate the digital world without exposing who they are, where they are, or what they are working on.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchRedmond, WA, United StatesHQ recorded Sep 28, 202610001+117 contacts →

Exact match

“Microsoft Intune empowers your organization to simplify endpoint management, help protect a hybrid workforce, and power better user experiences.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchEden Prairie, MN, United StatesHQ recorded Sep 28, 20265,001-10,000109 contacts →

Exact match

“As of February 3, 2025, Cylance® endpoint security assets, including CylanceENDPOINT, CylanceEDGE and CylanceMDR, are now part of Arctic Wolf.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchSanta Clara, CA, United StatesHQ recorded Sep 28, 2026501-1,000106 contacts →

Exact match

“ThreatDown is a standalone leader in elite Managed Detection and Response (MDR), purpose-built to empower resource-constrained security teams with high-efficacy protection…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchReston, VA, United StatesHQ recorded Sep 28, 202651-200103 contacts →

Exact match

“We stand in the breach so you don’t have to.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchPalo Alto, CA, United StatesHQ recorded Sep 28, 2026n/a75 contacts →

Exact match

“HP Wolf Security is world class endpoint security.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchSioux City, IA, United StatesHQ recorded Sep 28, 202651-20069 contacts →

Exact match

“PC Matic was founded in by Rob Cheng and Dave Methvin with the sole purpose of creating a better way to diagnose common computer problems.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchSt. Charles, IL, United StatesHQ recorded Sep 28, 202651-20068 contacts →

Exact match

“We've been serving and defending businesses since 2008 as trusted, personable guides in this complex, ever-changing, high-stakes field-MSSP Alert's Top 50 MSSPs Of 2020 -LogRhythm…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchNew York, NY, United StatesHQ recorded Sep 28, 202611-5057 contacts →

Exact match

“nsKnox is a cybersecurity company focused on Corporate Payment Security, founded and led by Alon Cohen, Founder & former CEO of CyberArk (NASDAQ: CYBR).”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchFremont, CA, United StatesHQ recorded Sep 28, 20261,001-5,00057 contacts →

Exact match

“SentinelOne, an autonomous cybersecurity platform company, has completed the acquisition of Attivo Networks.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 402 endpoint security firms based in the United States

See the full list, filter by size, metro and specialty, and access 11,138 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Endpoint security firms based in the United States at a glance

As of Sep 28, 2026
34.1%Verified-email coverage
81.3Average contacts per company
11-50Median size (employees)
4.7%Largest-city concentration · New York
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
180
11-50
140
51-200
48
201-500
14
501-1,000
9
1,001-5,000
4
5,001-10,000
3
10001+
4

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 402 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United States whose business descriptions match “endpoint security firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 11,138 professional contacts with verified work emails across the full matched dataset. 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.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “endpoint security firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many endpoint security firms are there based in the United States?

RevenueBase identified 402 company matches for endpoint security firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Symantec tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most endpoint security firms?

New York leads with 19 company records, followed by San Francisco (14) and Austin (10).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 11,138 professional contacts with verified work emails tracked across these 402 companies; direct dials are available where recorded.

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 SmartSearch, 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.