Company lists · Data refreshed September 2026
Top 25 Network security monitoring companies based in the United States
RevenueBase identified 1,362 network security monitoring companies headquartered in the United States as of September 2026 and tracks 67,297 professional contacts across them, including 35,524 with verified work emails and 20,018 with mobile numbers. New York is the largest hub.
This list covers network security monitoring 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest network security monitoring companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 18,431 | ||||
“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: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 14,289 | ||||
“Fortinet makes possible a digital world that we can always trust through its mission to protect people, devices, and data everywhere.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 3,145 | ||||
“Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 3,052 | ||||
“SentinelOne is the world's leading AI-powered cybersecurity platform.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 2,813 | ||||
“Infoblox unites networking and security to deliver unmatched performance and protection.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,232 | ||||
“GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 904 | ||||
“ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 874 | ||||
“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 726 | ||||
“ExtraHop is a leader in real-time network intelligence, empowering organizations with the high-fidelity context they need to power security and IT AI automation, detect risks…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 696 | ||||
“Protect Your Endpoints, Identities, Logs, and Employees.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 683 | ||||
“BlueVoyant’s Cyber Defense Platform (CDP) integrates MDR, TPRM, and DRP into a seamless, scalable solution.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | Vectra AIPartial evidence | 651 | |||
“Vectra AI is the cybersecurity AI leader in protecting modern networks from modern attacks.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 641 | ||||
“At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 523 | ||||
“UltraViolet Cyber is the only security operations partner that unifies red, blue, and purple team capabilities into one integrated program, finding what's vulnerable, stopping…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | 408 | ||||
“Red Canary stops cyber threats no one else does, so organizations can fearlessly pursue their missions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 295 | ||||
“We are Cipher, a company from the Prosegur group specializing in Cybersecurity.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 276 | ||||
“In the ever-growing world of Cloud Computing, Big Data and the Internet of Things, NIKSUN® is the industry leader in making the unknown known.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 239 | ||||
“CUJO AI® is the global leader of cutting-edge cybersecurity and network intelligence solutions that enable network operators globally to improve the digital life protection of…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 239 | ||||
“GM Sectec is a multi-national organization laser focused on cyber defense, advisory and fraud prevention.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | 234 | ||||
“Axur is the external cybersecurity company empowering security teams to detect, inspect, and respond to threats beyond the perimeter.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | LoginsoftIndirect evidence | 220 | |||
“For over 20 years, leading companies in Telecom, Cybersecurity, Healthcare, Banking, New Media, and more have come to rely on Loginsoft as a trusted resource for technology talent.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 211 | ||||
“Vehere is an AI cyber defense company operating at the intersection of national security and enterprise security.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 206 | ||||
“Since 1969, thousands of businesses across the country have entrusted their protection to DGA Security.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 202 | ||||
“Stone Security has been driving the implementation of network-based surveillance, access control and intrusion systems for over 15 years.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 199 | ||||
“Webroot, an OpenText company, was the first to harness the cloud and artificial intelligence to stop zero-day threats in real time.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 1,362 network security monitoring companies based in the United States
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Network security monitoring companies based in the United States at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 network security monitoring companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “network security monitoring companies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among network security monitoring 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 an evidence 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, 35,524 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 5, 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.
Network security monitoring companies by metro
Frequently asked
How many network security monitoring companies are there based in the United States?
RevenueBase identified 1,362 network security monitoring 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 network security monitoring companies?
New York leads with 42 headquartered companies, followed by Miami (32) and Houston (31).
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 35,524 verified decision-maker contacts tracked across these 1,362 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 5, 2026.
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Network security monitoring companies by geography
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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.
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