Company lists · Data refreshed September 2026

Top 25 Security monitoring software companies worldwide

RevenueBase identified 4,653 security monitoring software companies worldwide as of September 2026 and tracks 175,963 professional contacts across them, including 79,848 with verified work emails. The United States is the largest market and London the largest hub.

This list covers security monitoring software companies worldwide, 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 29, 2026. Country and city lists for security monitoring software companies follow the table.

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 29, 2026 86% judged on-target in blind review
4,653Companies
175,963Contacts tracked
79,848Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest security monitoring software companies worldwide

Ranked by team size
Top 25 of 4,653 security monitoring software companies worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to security monitoring software 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceSanta Clara, CA, United StatesHQ checked Sep 29, 202610001+18,431 contacts →

Indirect 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 29, 2026
2Indirect evidenceSunnyvale, CA, United StatesHQ checked Sep 29, 202610001+14,289 contacts →

Indirect 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 29, 2026
3Partial evidenceRemote, United StatesHQ checked Sep 29, 20265,001-10,00010,118 contacts →

Partial 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 29, 2026
4Indirect evidenceYoyogi, JapanHQ checked Sep 29, 20265,001-10,0004,942 contacts →

Indirect evidence

“We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceAbingdon, United KingdomHQ checked Sep 29, 20265,001-10,0004,925 contacts →

Indirect evidence

“Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.”

Source: RevenueBase Database · checked Sep 29, 2026
6Partial evidencePlano, TX, United StatesHQ checked Sep 29, 20261,001-5,0003,447 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 29, 2026
7Indirect evidenceEden Prairie, MN, United StatesHQ checked Sep 29, 20261,001-5,0003,145 contacts →

Indirect evidence

“Every year new technologies, vendors, and solutions emerge-yet despite this constant innovation, high-profile breaches are all over the headlines.”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceFoster City, CA, United StatesHQ checked Sep 29, 20261,001-5,0003,058 contacts →

Partial evidence

“Qualys, Inc.(NASDAQ: QLYS) is a leading provider of disruptive cloud-based security, compliance and IT solutions with more than subscription customers worldwide, including a…”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidenceMountain View, CA, United StatesHQ checked Sep 29, 20261,001-5,0003,052 contacts →

Indirect evidence

“SentinelOne is the world's leading AI-powered cybersecurity platform.”

Source: RevenueBase Database · checked Sep 29, 2026
10Indirect evidenceBoston, MA, United StatesHQ checked Sep 29, 20261,001-5,0002,822 contacts →

Indirect 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 29, 2026
11Partial evidenceSanta Clara, CA, United StatesHQ checked Sep 29, 20261,001-5,0002,813 contacts →

Partial evidence

“Infoblox unites networking and security to deliver unmatched performance and protection.”

Source: RevenueBase Database · checked Sep 29, 2026
12Partial evidenceMiami, FL, United StatesHQ checked Sep 29, 20261,001-5,0002,715 contacts →

Partial evidence

“Varonis unifies AI-native data security, AI security and governance, and behavior-based threat detection.”

Source: RevenueBase Database · checked Sep 29, 2026
13Strong evidenceSouth Jordan, UT, United StatesHQ checked Sep 29, 20261,001-5,0002,691 contacts →

Strong evidence

“Ivanti is a global enterprise IT and security software company that provides the trusted data authority for AI-driven, autonomous endpoint management.”

Source: RevenueBase Database · checked Sep 29, 2026
14Indirect evidenceCambridge, United KingdomHQ checked Sep 29, 20261,001-5,0002,355 contacts →

Indirect evidence

“Darktrace is a global leader in AI cybersecurity, providing the essential cybersecurity platform to secure organizations today and for an ever-changing future.”

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceBucuresti, RomaniaHQ checked Sep 29, 20261,001-5,0002,172 contacts →

Indirect evidence

“Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.”

Source: RevenueBase Database · checked Sep 29, 2026
16Indirect evidenceCampbell, CA, United StatesHQ checked Sep 29, 20261,001-5,0002,157 contacts →

Indirect evidence

“Barracuda is a leading global cybersecurity company providing complete protection against complex threats for all size business.”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceBratislava, SlovakiaHQ checked Sep 29, 20261,001-5,0001,719 contacts →

Indirect evidence

“When technology enables progress, ESET is here to protect it.”

Source: RevenueBase Database · checked Sep 29, 2026
18Partial evidencePune, IndiaHQ checked Sep 29, 20261,001-5,0001,510 contacts →

Partial evidence

“Quick Heal Technologies Limited is one of the leading providers of IT Security and Data Protection Solutions with a strong footprint in India and an evolving global presence.”

Source: RevenueBase Database · checked Sep 29, 2026
19Partial evidenceTampa, FL, United StatesHQ checked Sep 29, 20261,001-5,0001,285 contacts →

Partial evidence

“ReliaQuest exists to Make Security Possible.”

Source: RevenueBase Database · checked Sep 29, 2026
20Indirect evidenceAustin, TX, United StatesHQ checked Sep 29, 202610001+1,217 contacts →

Indirect evidence

“On Dec.”

Source: RevenueBase Database · checked Sep 29, 2026
21Indirect evidenceBoston, MA, United StatesHQ checked Sep 29, 2026501-1,0001,030 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 29, 2026
22Indirect evidenceBaltimore, MD, United StatesHQ checked Sep 29, 2026501-1,000904 contacts →

Indirect evidence

“ZeroFox is the solution to discover, validate, and disrupt external cyber threats before they harm revenue or reputation.”

Source: RevenueBase Database · checked Sep 29, 2026
23Partial evidenceSan Jose, CA, United StatesHQ checked Sep 29, 2026501-1,000889 contacts →

Partial evidence

“Netenrich is redefining security operations by shifting the focus from "efficiency"(speed) to "efficacy"(comprehensive coverage).”

Source: RevenueBase Database · checked Sep 29, 2026
24Indirect evidenceBroomfield, CO, United StatesHQ checked Sep 29, 2026501-1,000876 contacts →

Indirect evidence

“Exabeam is the leader in Behavior Intelligence for the agentic enterprise.”

Source: RevenueBase Database · checked Sep 29, 2026
25Indirect evidenceChicago, IL, United StatesHQ checked Sep 29, 2026501-1,000874 contacts →

Indirect evidence

“Trustwave, a LevelBlue Company, is a globally recognized cybersecurity leader that reduces cyber risk and fortifies organizations against disruptive and damaging cyber threats.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 4,653 security monitoring software companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 79,848 reachable decision-makers.

Free signup · no credit card

View the full list →

Security monitoring software companies worldwide at a glance

As of Sep 29, 2026
45.4%Verified-email coverage
37.8Average contacts per company
11-50Median size (employees)
2.1%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
1,925
11-50
1,767
51-200
633
201-500
151
501-1,000
60
1,001-5,000
70
5,001-10,000
19
10001+
11

Email recency is reported on each country list linked below.

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 security monitoring software 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.
Coverage
Every country. Country and city lists for security monitoring software companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “security monitoring software 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 security monitoring software 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 security monitoring software companies, and records with no verified work email.
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, 79,848 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 29, 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.

Security monitoring software companies by location

29 lists · largest first

Every Security monitoring software companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 security monitoring software 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 security monitoring software companies are there worldwide?

RevenueBase identified 4,653 security monitoring software companies worldwide 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 country has the most security monitoring software companies?

The United States leads with 1,253 companies, followed by India (351) and Brazil (316). Every security monitoring software companies list by country and city is linked on this page.

Which city has the most security monitoring software companies?

London leads with 97 headquartered companies, followed by Sao Paulo (68) and New York (59).

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 79,848 verified decision-maker contacts tracked across these 4,653 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 29, 2026.

Ready to reach these companies? Verified emails and direct dials for all 4,653 security monitoring software companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

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.