Company lists · Data refreshed September 2026

Top 25 AI security firms worldwide

Name: AI security firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 5,496 companies tracked

RevenueBase identified 5,496 AI security firms worldwide as of September 2026 and tracks 213,099 professional contacts across them, including 95,309 with verified work emails. The United States is the largest market and London the largest hub.

This list covers AI security firms 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 21, 2026. Country and city lists for AI security firms 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 21, 2026 86% judged on-target in blind review

5,496Companies

213,099Contacts tracked

95,309Verified emails

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The 25 largest AI security firms worldwide

Ranked by team size

Top 25 of 5,496 AI security firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to AI security firms: 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	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	10001+	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 21, 2026
2	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 2026	10001+	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 21, 2026
3	Crowdstrike	Partial evidence	Remote, United StatesHQ checked Sep 21, 2026	5,001-10,000	10,118 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 21, 2026
4	Check Point Software	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 21, 2026	5,001-10,000	7,668 contacts →
	Indirect evidence “Check Point Software Technologies Ltd.” Source: RevenueBase Database · checked Sep 21, 2026
5	Trend Micro	Indirect evidence	Yoyogi, JapanHQ checked Sep 21, 2026	5,001-10,000	4,942 contacts →
	Indirect evidence “We’re a global cybersecurity leader, helping to make the world safe for exchanging digital information.” Source: RevenueBase Database · checked Sep 21, 2026
6	Sophos	Partial evidence	Abingdon, United KingdomHQ checked Sep 21, 2026	5,001-10,000	4,925 contacts →
	Partial evidence “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Source: RevenueBase Database · checked Sep 21, 2026
7	Proofpoint	Partial evidence	Sunnyvale, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	4,722 contacts →
	Partial evidence “Intent-based protection for every human and every AI agent, across all data.” Source: RevenueBase Database · checked Sep 21, 2026
8	Rubrik	Strong evidence	Palo Alto, CA, United StatesHQ checked Sep 21, 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 21, 2026
9	Commvault	Indirect evidence	Tinton Falls, NJ, United StatesHQ checked Sep 21, 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 21, 2026
10	Trellix	Partial evidence	Plano, TX, United StatesHQ checked Sep 21, 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 21, 2026
11	Netskope	Strong evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,056 contacts →
	Strong evidence “Netskope (NASDAQ: NTSK), a leader in modern security and networking for the cloud and AI era, addresses the needs of both security and networking teams by providing optimized…” Source: RevenueBase Database · checked Sep 21, 2026
12	Sentinelone	Partial evidence	Mountain View, CA, United StatesHQ checked Sep 21, 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 21, 2026
13	Rapid7	Partial evidence	Boston, MA, United StatesHQ checked Sep 21, 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 21, 2026
14	Varonis	Strong evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,715 contacts →
	Strong evidence “Varonis unifies AI-native data security, AI security and governance, and behavior-based threat detection.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ivanti	Strong evidence	South Jordan, UT, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,691 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 21, 2026
16	Knowbe4	Partial evidence	Clearwater, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,367 contacts →
	Partial evidence “KnowBe4 empowers the modern workforce to make smarter security decisions every day.” Source: RevenueBase Database · checked Sep 21, 2026
17	Darktrace	Partial evidence	Cambridge, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,355 contacts →
	Partial 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 21, 2026
18	Mimecast	Indirect evidence	London, United KingdomHQ checked Sep 21, 2026	1,001-5,000	2,304 contacts →
	Indirect evidence “organizations.” Source: RevenueBase Database · checked Sep 21, 2026
19	Barracuda	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	2,157 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 21, 2026
20	Wilson Security	Partial evidence	Essendon Fields, AustraliaHQ checked Sep 21, 2026	5,001-10,000	1,813 contacts →
	Partial evidence “At Wilson Security, we are committed to building a safer future for everyone.” Source: RevenueBase Database · checked Sep 21, 2026
21	Inspira Enterprise	Partial evidence	Mumbai, IndiaHQ checked Sep 21, 2026	1,001-5,000	1,773 contacts →
	Partial evidence “Inspira Enterprise is a global Cybersecurity & Data Analytics & AI services provider with a presence in North America, ASEAN, Middle East, India, and Africa regions.” Source: RevenueBase Database · checked Sep 21, 2026
22	Fortra	Partial evidence	Eden Prairie, MN, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,648 contacts →
	Partial evidence “Fortra delivers AI-amplified cybersecurity solutions that help organizations use and protect data with confidence.” Source: RevenueBase Database · checked Sep 21, 2026
23	Reliaquest	Partial evidence	Tampa, FL, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,285 contacts →
	Partial evidence “ReliaQuest exists to Make Security Possible.” Source: RevenueBase Database · checked Sep 21, 2026
24	CYERA	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1,001-5,000	1,130 contacts →
	Strong evidence “Cyera is the industry-leading AI Security Platform.” Source: RevenueBase Database · checked Sep 21, 2026
25	Cohere	Strong evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	201-500	975 contacts →
	Strong evidence “Cohere is the leading security-first enterprise AI company.” Source: RevenueBase Database · checked Sep 21, 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: AI security firms. 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 AI security firms.
Partial evidence: Its own public description names part of AI security firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name AI security firms. 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 5,496 AI security firms worldwide

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AI security firms worldwide at a glance

As of Sep 21, 2026

44.7%Verified-email coverage

38.8Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,434

11-50

1,943

51-200

678

201-500

202

501-1,000

1,001-5,000

5,001-10,000

10001+

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 AI security firms, 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 AI security firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “AI security firms”. 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 AI security firms), 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 AI security firms, 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, 95,309 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 21, 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.

AI security firms by location

34 lists · largest first

Every AI security firms 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 AI security firms, 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 AI security firms are there worldwide?

RevenueBase identified 5,496 AI security firms 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 AI security firms?

The United States leads with 1,402 companies, followed by India (541) and the United Kingdom (261). Every AI security firms list by country and city is linked on this page.

Which city has the most AI security firms?

London leads with 127 headquartered companies, followed by New York (82) and Dubai (81).

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 95,309 verified decision-maker contacts tracked across these 5,496 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 21, 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.