Company lists · Data refreshed November 2026

Top 21 Incident response startups based in the United Kingdom

RevenueBase identified 121 company matches for incident response startups associated with the United Kingdom as of November 2026 and tracks 5,894 professional contacts across them, including 2,931 with verified work emails. London is the largest hub.

This list covers company matches for incident response startups 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 November 6, 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 Nov 6, 2026 How this list was built
121Companies
5,894Contacts tracked
2,931Verified emails
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The 21 largest incident response startups based in the United Kingdom

Ranked by team size
Top 21 of 121 company matches for incident response startups based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchLondon, United KingdomHQ recorded Nov 6, 202651-20063 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20049 contacts →

Exact match

“Cybersecurity should be simple.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchPortsmouth, United KingdomHQ recorded Nov 6, 202651-20046 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchCirencester, United KingdomHQ recorded Nov 6, 202611-5043 contacts →

Exact match

“We help organisations understand, optimise, and strengthen their cybersecurity.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchBirmingham, United KingdomHQ recorded Nov 6, 202651-20043 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 · Nov 6, 2026 · View company records in RevenueBase
6Exact matchCheadle, United KingdomHQ recorded Nov 6, 202651-20043 contacts →

Exact match

“Mitigo Group keeps professional services firms safe from cyberattack and operationally resilient.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchActon, United KingdomHQ recorded Nov 6, 202651-20037 contacts →

Exact match

“Adaptive Cyber Security JUMPSEC operates on a core principle: real attack insight drives stronger defence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 2026201-50036 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchPortsmouth, United KingdomHQ recorded Nov 6, 202611-5029 contacts →

Exact match

“Imagine a world where cyber threats are simply another challenge that you're fully equipped to handle.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5025 contacts →

Exact match

“Uptime Labs helps teams build confidence and consistency in incident response through realistic, hands-on training.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchTewkesbury, United KingdomHQ recorded Nov 6, 202611-5024 contacts →

Exact match

“Cyberis are pioneers in customer-focussed information security.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchNewbury, United KingdomHQ recorded Nov 6, 202611-5023 contacts →

Exact match

“CyberCrowd are a market leader in the cyber security realm, offering everything from Assessment Services through to Pen Testing, CISOaaS, Certification Readiness, DPO services…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchBradford, United KingdomHQ recorded Nov 6, 202651-20023 contacts →

Exact match

“22 June 2023 – Daisy Corporate Services announced the acquisition of cyber security service provider, ECSC Group plc.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-20017 contacts →

Exact match

“Who We Are DataSixth delivers Cybersecurity Intelligence.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchCambridge, United KingdomHQ recorded Nov 6, 202611-5016 contacts →

Exact match

“Digital Forensics, Incident Response & Data Breach Management Services 3B Data Security is an approved PCI SSC PCI Forensic Investigator (PFI) and Qualified Security Assessor…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchBorehamwood, United KingdomHQ recorded Nov 6, 20261-1014 contacts →

Exact match

“Award-winning cybersecurity partner.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5013 contacts →

Exact match

“From our diverse backgrounds in cyber incident response, forensic investigations, automation, data science and cyber insurance, we have a unique perspective on how to improve…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“SecureTeam are a UK-based information security practice, specialising in all areas of cybersecurity.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5011 contacts →

Exact match

“First Response is a London based specialist cybersecurity, cyber incident response and digital investigation company that helps organisations navigate the complex issues…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-109 contacts →

Exact match

“From the little niggles to the large networks It’s the little things that are vital whether you have a website, online accounts or any type of web-based infrastructure.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Nov 6, 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 · Nov 6, 2026 · View company records in RevenueBase

Showing 21 of 121 incident response startups based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 2,931 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Incident response startups based in the United Kingdom at a glance

As of Nov 6, 2026
49.7%Verified-email coverage
48.7Average contacts per company
11-50Median size (employees)
47.1%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
53
11-50
39
51-200
22
201-500
3
501-1,000
1
1,001-5,000
2
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 121 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 “incident response startups” 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 2,931 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 November 6, 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.

Incident response startups by metro

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 “incident response startups”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 121 company matches for incident response startups associated with the United Kingdom as of November 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?

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

Which city has the most incident response startups?

London leads with 57 company records, followed by Manchester (7) and Cheltenham (3).

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 2,931 professional contacts with verified work emails tracked across these 121 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 November 6, 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.