Company lists · Data refreshed September 2026

Top 13 Incident response law firms based in London, United Kingdom

RevenueBase identified 34 incident response law firms headquartered in London, United Kingdom as of September 2026 and tracks 190 professional contacts across them, including 46 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers incident response law firms headquartered in London, United Kingdom, 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 28, 2026.

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 28, 2026 86% judged on-target in blind review
34Companies
190Contacts tracked
46Verified emails
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The 13 largest incident response law firms based in London, United Kingdom

Ranked by team size
Top 13 of 34 incident response law firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to incident response law 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-5017 contacts →

Indirect evidence

“We are a leading cybersecurity services organization with more than a decade of proven expertise in consulting, solution implementation and managed services.”

Source: RevenueBase Database · checked Sep 28, 2026
2Strong evidenceLondon, United KingdomHQ checked Sep 28, 202611-5011 contacts →

Strong evidence

“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…”

Source: RevenueBase Database · checked Sep 28, 2026
3Strong evidenceLondon, United KingdomHQ checked Sep 28, 202611-5011 contacts →

Strong evidence

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

Source: RevenueBase Database · checked Sep 28, 2026
4Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-506 contacts →

Indirect evidence

“The AbedGraham Group is one of Europe’s most sought after audit, executive liability and crisis communications conglomerates specialising in fields including clinical safety…”

Source: RevenueBase Database · checked Sep 28, 2026
5Indirect evidenceLondon, United KingdomHQ checked Sep 28, 2026501-1,0006 contacts →

Indirect evidence

“Moore ClearComm, part of Moore Kingston Smith, is a leading professional services firm and listed within the top 10* accountants and business advisers within the UK.”

Source: RevenueBase Database · checked Sep 28, 2026
6Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-505 contacts →

Indirect evidence

“At Rexel Cyber we help businesses fight the constant threat of cyber attack and data breach.”

Source: RevenueBase Database · checked Sep 28, 2026
7Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20261-104 contacts →

Indirect evidence

“Forensic Control is a London-based cyber security consultancy, founded in 2008 and an authorised IASME Cyber Essentials Certification Body.”

Source: RevenueBase Database · checked Sep 28, 2026
8Partial evidenceLondon, United KingdomHQ checked Sep 28, 202611-502 contacts →

Partial evidence

“As a specialist cyber response service, we are experts in our field, trusted when it really matters.”

Source: RevenueBase Database · checked Sep 28, 2026
9Strong evidenceLondon, United KingdomHQ checked Sep 28, 20261-102 contacts →

Strong evidence

“Netscylla Cyber Security is a small start-up providing cyber security expertise, specialising in cyber security, offensive security, incident response and consultancy.”

Source: RevenueBase Database · checked Sep 28, 2026
10Partial evidenceLondon, United KingdomHQ checked Sep 28, 20261-102 contacts →

Partial evidence

“where technology meets the law.”

Source: RevenueBase Database · checked Sep 28, 2026
11Indirect evidenceLondon, United KingdomHQ checked Sep 28, 202611-501 contacts →

Indirect evidence

“ComplianceLogic Ltd is driven by the collective leadership and expertise of every member of our team.”

Source: RevenueBase Database · checked Sep 28, 2026
12Strong evidenceLondon, United KingdomHQ checked Sep 28, 20261-101 contacts →

Strong evidence

“Offering independent cyber, incident response, and digital investigations to a wide client base.”

Source: RevenueBase Database · checked Sep 28, 2026
13Indirect evidenceLondon, United KingdomHQ checked Sep 28, 20261-101 contacts →

Indirect evidence

“Can you imagine what it's like to be a Lawyer, an Accountant or a Professional Services company when you're hacked.”

Source: RevenueBase Database · checked Sep 28, 2026

Showing 13 of 34 incident response law firms based in London, United Kingdom

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Incident response law firms based in London, United Kingdom at a glance

As of Sep 28, 2026
24.2%Verified-email coverage
5.6Average contacts per company
1-10Median size (employees)
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
20
11-50
9
51-200
1
201-500
2
501-1,000
1
10001+
1

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 34 companies.

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 incident response law 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.
What qualifies
Companies headquartered in London, United Kingdom whose own description of what they do matches “incident response law 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 incident response law 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 incident response law firms, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
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, 46 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 28, 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.

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 incident response law 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 incident response law firms are there based in London, United Kingdom?

RevenueBase identified 34 incident response law firms headquartered in London, United Kingdom 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?

Sinevis, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most incident response law firms?

London leads the United Kingdom with 34 headquartered companies, followed by Manchester (5) and Cheltenham (3).

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 46 verified decision-maker contacts tracked across these 34 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 28, 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.