Company lists · Data refreshed September 2026

Top 25 Extended detection and response companies worldwide

Name: Extended detection and response companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 5,941 companies tracked

RevenueBase identified 5,941 extended detection and response companies worldwide as of September 2026 and tracks 150,781 professional contacts across them, including 57,573 with verified work emails. The United States is the largest market and London the largest hub.

This list covers extended detection and response 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 20, 2026. Country and city lists for extended detection and response 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 20, 2026 86% judged on-target in blind review

5,941Companies

150,781Contacts tracked

57,573Verified emails

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The 25 largest extended detection and response companies worldwide

Ranked by team size

Top 25 of 5,941 extended detection and response companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to extended detection and response 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	Fortinet	Indirect evidence	Sunnyvale, CA, United StatesHQ checked Sep 20, 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 20, 2026
2	Symantec	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	10001+	11,169 contacts →
	Indirect evidence “Your backstage pass to the most epic cybersecurity solutions on the market for Endpoint, Network, Data and Cloud security.” Source: RevenueBase Database · checked Sep 20, 2026
3	Trend Micro	Indirect evidence	Yoyogi, JapanHQ checked Sep 20, 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 20, 2026
4	Sophos	Indirect evidence	Abingdon, United KingdomHQ checked Sep 20, 2026	5,001-10,000	4,925 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 20, 2026
5	Commvault	Indirect evidence	Tinton Falls, NJ, United StatesHQ checked Sep 20, 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 20, 2026
6	Trellix	Indirect evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,447 contacts →
	Indirect 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 20, 2026
7	Arctic Wolf	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 20, 2026	1,001-5,000	3,145 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 20, 2026
8	Rapid7	Indirect evidence	Boston, MA, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,822 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 20, 2026
9	OPTIV	Indirect evidence	Leawood, KS, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,222 contacts →
	Indirect evidence “Optiv is the cyber advisory and solutions leader, delivering strategic and technical expertise to nearly companies across every major industry.” Source: RevenueBase Database · checked Sep 20, 2026
10	Bitdefender	Strong evidence	Bucuresti, RomaniaHQ checked Sep 20, 2026	1,001-5,000	2,172 contacts →
	Strong evidence “Bitdefender is a cybersecurity leader delivering best-in-class threat prevention, detection, and response solutions worldwide.” Source: RevenueBase Database · checked Sep 20, 2026
11	Barracuda	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 20, 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 20, 2026
12	Guidepoint Security	Indirect evidence	Reston, VA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,232 contacts →
	Indirect evidence “GuidePoint Security provides trusted cybersecurity expertise, solutions, and services that help organizations make informed decisions and minimize risk.” Source: RevenueBase Database · checked Sep 20, 2026
13	Ensign Infosecurity	Indirect evidence	SingaporeHQ checked Sep 20, 2026	501-1,000	888 contacts →
	Indirect evidence “Ensign InfoSecurity is the largest pure-play end-to-end cybersecurity service provider in Asia.” Source: RevenueBase Database · checked Sep 20, 2026
14	Trustwave, A Levelblue Company	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 20, 2026	501-1,000	874 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 20, 2026
15	Cyderes	Indirect evidence	Kansas City, MO, United StatesHQ checked Sep 20, 2026	1,001-5,000	844 contacts →
	Indirect evidence “Today’s threatscape is relentless.” Source: RevenueBase Database · checked Sep 20, 2026
16	SISA	Partial evidence	Bengaluru, IndiaHQ checked Sep 20, 2026	201-500	743 contacts →
	Partial evidence “SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…” Source: RevenueBase Database · checked Sep 20, 2026
17	Extrahop	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 20, 2026	501-1,000	726 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 20, 2026
18	Securonix	Indirect evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	501-1,000	712 contacts →
	Indirect evidence “Securonix is transforming how security operations are delivered, measured, and scaled.” Source: RevenueBase Database · checked Sep 20, 2026
19	Huntress	Indirect evidence	Columbia, MD, United StatesHQ checked Sep 20, 2026	501-1,000	696 contacts →
	Indirect evidence “Protect Your Endpoints, Identities, Logs, and Employees.” Source: RevenueBase Database · checked Sep 20, 2026
20	Bluevoyant	Indirect evidence	New York, NY, United StatesHQ checked Sep 20, 2026	501-1,000	683 contacts →
	Indirect evidence “BlueVoyant’s Cyber Defense Platform (CDP) integrates MDR, TPRM, and DRP into a seamless, scalable solution.” Source: RevenueBase Database · checked Sep 20, 2026
21	Network Intelligence	Indirect evidence	Plano, TX, United StatesHQ checked Sep 20, 2026	501-1,000	641 contacts →
	Indirect evidence “At Network Intelligence, we combine our team of 500+ security professionals with Transilience – our cutting-edge AI platform.” Source: RevenueBase Database · checked Sep 20, 2026
22	I-Tracing	Indirect evidence	Courbevoie, FranceHQ checked Sep 20, 2026	1,001-5,000	639 contacts →
	Indirect evidence “I-TRACING, pure player and cybersecurity service provider leader in France, supports over 600 clients around the world in managing their cyber risks, from anticipating threats to…” Source: RevenueBase Database · checked Sep 20, 2026
23	Advens	Indirect evidence	Paris, ItalyHQ checked Sep 20, 2026	501-1,000	586 contacts →
	Indirect evidence “Advens is a European, independent and outstanding leader in cybersecurity.” Source: RevenueBase Database · checked Sep 20, 2026
24	Cybereason, A Levelblue Company	Strong evidence	San Diego, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	574 contacts →
	Strong evidence “Cybereason, a LevelBlue company, is a global cybersecurity leader delivering advanced endpoint detection and response (EDR) and industry recognized consulting services to support…” Source: RevenueBase Database · checked Sep 20, 2026
25	Withsecure	Indirect evidence	Helsinki, FinlandHQ checked Sep 20, 2026	501-1,000	563 contacts →
	Indirect evidence “WithSecure™ is Europe's cybersecurity partner of choice.” Source: RevenueBase Database · checked Sep 20, 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: extended detection and response 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 extended detection and response companies.
Partial evidence: Its own public description names part of extended detection and response companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name extended detection and response 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 5,941 extended detection and response companies worldwide

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Extended detection and response companies worldwide at a glance

As of Sep 20, 2026

38.2%Verified-email coverage

25.4Average contacts per company

11-50Median size (employees)

2.3%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

2,785

11-50

2,238

51-200

651

201-500

147

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 extended detection and response 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 extended detection and response companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “extended detection and response 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 extended detection and response 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 extended detection and response 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, 57,573 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 20, 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.

Extended detection and response companies by location

37 lists · largest first

Every Extended detection and response 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 extended detection and response 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 extended detection and response companies are there worldwide?

RevenueBase identified 5,941 extended detection and response 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?

Fortinet, headquartered in Sunnyvale, tops this list with the largest team on record.

Which country has the most extended detection and response companies?

The United States leads with 1,437 companies, followed by India (609) and the United Kingdom (328). Every extended detection and response companies list by country and city is linked on this page.

Which city has the most extended detection and response companies?

London leads with 136 headquartered companies, followed by Dubai (82) and Sao Paulo (60).

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 57,573 verified decision-maker contacts tracked across these 5,941 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 20, 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.