Company lists · Data refreshed October 2026

Top 22 Extended detection and response xdr platform companies based in the United Kingdom

RevenueBase identified 50 company matches for extended detection and response xdr platform companies associated with the United Kingdom as of October 2026 and tracks 3,090 professional contacts across them, including 1,976 with verified work emails. London is the largest hub.

This list covers company matches for extended detection and response xdr platform companies associated with the United Kingdom, 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 October 1, 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 Oct 1, 2026 How this list was built
50Companies
3,090Contacts tracked
1,976Verified emails
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The 22 largest extended detection and response xdr platform companies based in the United Kingdom

Ranked by team size
Top 22 of 50 company matches for extended detection and response xdr platform companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 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 matchCambridge, United KingdomHQ recorded Oct 1, 20261,001-5,0002,355 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-200109 contacts →

Exact match

“Red Sift enables organizations to anticipate, respond to, and recover from cyber attacks while continuing to operate effectively.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3Exact matchLondon, United KingdomHQ recorded Oct 1, 202651-20096 contacts →

Exact match

“CyberOne is a Microsoft Security Elite Partner and one of only 100 global Microsoft partners recognised with Microsoft-Verified Managed XDR solution status.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4Exact matchCambridge, United KingdomHQ recorded Oct 1, 202651-20088 contacts →

Exact match

“For over 25 years, Cambridge-based Softwerx has redefined cybersecurity for midmarket organisations with its financially guaranteed 24×7x365 Managed XDR solutions.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5Exact matchEdinburgh, United KingdomHQ recorded Oct 1, 2026201-50051 contacts →

Exact match

“We are Adarma, independent leaders in detection and response services.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6Exact matchBirmingham, United KingdomHQ recorded Oct 1, 202651-20042 contacts →

Exact match

“CyberQ Group is an award-winning, venture-backed, and globally accredited [ISO27K and CREST] cybersecurity leader dedicated to bridging the "protection gap" for high-stakes…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7Exact matchMilton Keynes, United KingdomHQ recorded Oct 1, 202611-5042 contacts →

Exact match

“CYSIAM® provides an entirely UK-based and threat-led 24/7 Managed Detection and Response (MDR) service.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5041 contacts →

Exact match

“Know what’s protected and gain a trusted view of your endpoints.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9Exact matchPortsmouth, United KingdomHQ recorded Oct 1, 202651-20041 contacts →

Exact match

“We are on a mission to simplify and scale cyber security by combining AI, automation, expert-led services, in a unified platform: giving every organisation, from MSPs to global…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10Exact matchCardiff, United KingdomHQ recorded Oct 1, 202611-5038 contacts →

Exact match

“With constant vigilance against cyber threats comes the calm to grow your business.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
11Exact matchPeterborough, United KingdomHQ recorded Oct 1, 202651-20032 contacts →

Exact match

“Intrinsic Security is a UK-headquartered cybersecurity firm delivering 24/7 threat detection, incident response, and resilience across cloud, hybrid, OT, IoT, and identity…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
12Exact matchSouthwark, United KingdomHQ recorded Oct 1, 202611-5016 contacts →

Exact match

“Award-winning BlockAPT is redefining cybersecurity with an AI-powered, autonomous, self-defending platform built to protect modern digital ecosystems at speed and scale.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-5014 contacts →

Exact match

“ResilientX Security is a fast-growing Cyber Security company that helps organizations of all sizes identify, quantify and manage their cyber risks and cyber exposure.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-508 contacts →

Exact match

“Cyberseer offers Advanced Threat Detection and a 24×7 Managed Security Service (MSS).”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-107 contacts →

Exact match

“CounterShadow is redefining the cybersecurity landscape as the future of agentic cybersecurity.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-107 contacts →

Exact match

“Priam Cyber AI builds AVA (Advanced Virtual Analyst), an AI SOC platform that investigates alerts the way an analyst would.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Oct 1, 202611-507 contacts →

Exact match

“Medicare Network is a niche, agile cybersecurity and risk management company offering a range of industry-leading and advanced solutions that combines human intelligence…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
18Exact matchWest Bridgford, United KingdomHQ recorded Oct 1, 20261-104 contacts →

Exact match

“At Brit-Tec, we believe cybersecurity shouldn’t just protect your business-it should empower it.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-103 contacts →

Exact match

“Cyberrock is a cybersecurity company making enterprise-grade protection accessible to small & medium sized businesses and remote workers.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-102 contacts →

Exact match

“We are delighted to announce the acquisition of the industry leading PHALANX Clavisi, Cyber Security Platform PREVENT, DETECT, and RESPOND to Cyber Attacks”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Oct 1, 20261-102 contacts →

Exact match

“Seedata.io detect attackers by luring them to disclose their presence, turning their own techniques against them.”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
22Exact matchWest Runton, United KingdomHQ recorded Oct 1, 20261-101 contacts →

Exact match

“A local managed service provider with enterprise tools that protect, detect and respond to any issues on your computer and include the ability to roll back a ransomware attack…”

Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

Showing 22 of 50 extended detection and response xdr platform companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,976 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Extended detection and response xdr platform companies based in the United Kingdom at a glance

As of Oct 1, 2026
63.9%Verified-email coverage
61.8Average contacts per company
11-50Median size (employees)
42.0%Largest-city concentration · London
Oct 1, 2026Page data refreshed

Companies by employee count

1-10
22
11-50
16
51-200
7
201-500
1
501-1,000
2
1,001-5,000
1
10001+
1

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 50 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 Kingdom whose business descriptions match “extended detection and response xdr platform companies” 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 1,976 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 October 1, 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 “extended detection and response xdr platform companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many extended detection and response xdr platform companies are there based in the United Kingdom?

RevenueBase identified 50 company matches for extended detection and response xdr platform companies associated with the United Kingdom as of October 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?

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

Which city has the most extended detection and response xdr platform companies?

London leads with 21 company records, followed by Manchester (3) and Cambridge (2).

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 1,976 professional contacts with verified work emails tracked across these 50 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 October 1, 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.