Company lists · Data refreshed September 2026

Top 25 Cyber incident response services based in the United Kingdom

Name: Cyber incident response services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 277 companies tracked

RevenueBase identified 277 company matches for cyber incident response services associated with the United Kingdom as of September 2026 and tracks 10,433 professional contacts across them, including 4,362 with verified work emails. London is the largest hub.

This list covers company matches for cyber incident response services 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 September 21, 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 Sep 21, 2026 How this list was built

277Companies

10,433Contacts tracked

4,362Verified emails

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The 25 largest cyber incident response services based in the United Kingdom

Ranked by team size

Top 25 of 277 company matches for cyber incident response services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Sophos	Exact match	Abingdon, United KingdomHQ recorded Sep 21, 2026	5,001-10,000	4,925 contacts →
	Exact match “Sophos is a cybersecurity leader defending organizations globally with an AI-driven platform and expert-led services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	S-Rm	Exact match	London, United KingdomHQ recorded Sep 21, 2026	201-500	351 contacts →
	Exact match “S-RM is a global intelligence and cyber security consultancy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Obrela	Exact match	London, United KingdomHQ recorded Sep 21, 2026	201-500	242 contacts →
	Exact match “Obrela Security Industries is a global provider of cyber security services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Deepcytes Cyber Labs UK	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	177 contacts →
	Exact match “Whether you’re a business or an individual, digital threats to your precious data and assets can come in any form - external or internal.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	Sapphire	Exact match	Newcastle Upon Tyne, United KingdomHQ recorded Sep 21, 2026	51-200	168 contacts →
	Exact match “Sapphire delivers comprehensive cyber solutions tailored to your needs, spanning across consultancy, managed services, IT/OT and beyond.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Cyberfort	Exact match	Thatcham, United KingdomHQ recorded Sep 21, 2026	51-200	159 contacts →
	Exact match “At Cyberfort we are passionate about the cyber security services we deliver for our customers which keeps their people, data, systems and technology infrastructure secure…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
7	Cyberone	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	96 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 · Sep 21, 2026 · View company records in RevenueBase
8	ITC Secure	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	87 contacts →
	Exact match “ITC Secure is an advisory-led cyber security services company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	Wavenet Cyberguard	Exact match	Stourport-on-severn, United KingdomHQ recorded Sep 21, 2026	201-500	86 contacts →
	Exact match “CyberGuard Technologies is the security division of Wavenet.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Foregenix	Exact match	Swindon, United KingdomHQ recorded Sep 21, 2026	51-200	80 contacts →
	Exact match “When your business relies on security, compliance and a strong reputation for taking care of your customers, you need a partner that understands your ethos, your challenges and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Reliance Cyber	Exact match	Waterloo, United KingdomHQ recorded Sep 21, 2026	51-200	80 contacts →
	Exact match “At Reliance Cyber, we believe in truly partnering with our customers.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Saepio Information Security	Exact match	High Wycombe, United KingdomHQ recorded Sep 21, 2026	51-200	74 contacts →
	Exact match “Saepio increase awareness, reduce risk and improve security in a continually evolving threat landscape.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Dionach By Nomios	Exact match	Oxford, United KingdomHQ recorded Sep 21, 2026	51-200	73 contacts →
	Exact match “Dionach by Nomios has over 25 years of expertise in information security, supporting organisations in building resilience against ever‑evolving cyber threats.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Digitalxraid	Exact match	Doncaster, United KingdomHQ recorded Sep 21, 2026	51-200	62 contacts →
	Exact match “At DigitalXRAID, we’re more than just a managed security services provider – we’re your trusted partner in safeguarding your business from cyber threats.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
15	Cyro Cyber	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	62 contacts →
	Exact match “Cyro Cyber are your cyber security Guardians.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	Cyberowl	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	52 contacts →
	Exact match “CyberOwl helps asset operators in the maritime and critical national infrastructure sectors gain visibility, cyber security and cyber compliance of systems on their distributed…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Hexegic	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	52 contacts →
	Exact match “At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	Istari	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	52 contacts →
	Exact match “ISTARI is a global cybersecurity firm, established by Temasek in 2020, with a unique model for helping clients build cyber resilience.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
19	Adarma Security	Exact match	Edinburgh, United KingdomHQ recorded Sep 21, 2026	201-500	51 contacts →
	Exact match “We are Adarma, independent leaders in detection and response services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Satisnet, A Gamma Company	Exact match	Luton, United KingdomHQ recorded Sep 21, 2026	51-200	45 contacts →
	Exact match “Established in 2004 (acquired by Gamma in 2023), Satisnet, a Gamma company is a pedigree-proven cyber security services and solutions specialist with a fully UK-based 24x7x365 SOC.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
21	Cyberq Group	Exact match	Birmingham, United KingdomHQ recorded Sep 21, 2026	51-200	42 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 · Sep 21, 2026 · View company records in RevenueBase
22	Cysiam	Exact match	Milton Keynes, United KingdomHQ recorded Sep 21, 2026	11-50	42 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 · Sep 21, 2026 · View company records in RevenueBase
23	Cybaverse	Exact match	Portsmouth, United KingdomHQ recorded Sep 21, 2026	51-200	41 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 · Sep 21, 2026 · View company records in RevenueBase
24	Secalliance	Exact match	London, United KingdomHQ recorded Sep 21, 2026	51-200	41 contacts →
	Exact match “SecAlliance delivers cyber threat intelligence services to banks, central banks, financial market infrastructures, governmental and EU agencies, international organisations, and…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Core To Cloud	Exact match	Cirencester, United KingdomHQ recorded Sep 21, 2026	11-50	39 contacts →
	Exact match “We help organisations understand, optimise, and strengthen their cybersecurity.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “cyber incident response services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 277 cyber incident response services based in the United Kingdom

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Cyber incident response services based in the United Kingdom at a glance

As of Sep 21, 2026

41.8%Verified-email coverage

37.7Average contacts per company

1-10Median size (employees)

43.0%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

145

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 277 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 “cyber incident response services” 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 4,362 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 September 21, 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 “cyber incident response services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cyber incident response services are there based in the United Kingdom?

RevenueBase identified 277 company matches for cyber incident response services associated with the United Kingdom as of September 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?

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

Which city has the most cyber incident response services?

London leads with 119 company records, followed by Manchester (14) and Birmingham (7).

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 4,362 professional contacts with verified work emails tracked across these 277 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 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 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.