Company lists · Data refreshed September 2026

Top 25 Cybersecurity law firms based in the United Kingdom

RevenueBase identified 406 company matches for cybersecurity law firms associated with the United Kingdom as of September 2026 and tracks 4,728 professional contacts across them, including 1,425 with verified work emails and 413 with mobile numbers. London is the largest hub.

This list covers company matches for cybersecurity law firms 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 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 Sep 1, 2026 How this list was built
406Companies
4,728Contacts tracked
1,425Verified emails
413Mobile numbers
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The 25 largest cybersecurity law firms based in the United Kingdom

Ranked by team size
Top 25 of 406 company matches for cybersecurity law firms based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 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 matchLeicester, United Kingdom201-500739 contacts →

Exact match

“SISA is a global forensics-driven cybersecurity solutions company, trusted by leading organizations for securing their businesses with robust preventive, detective, and corrective…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
2Exact matchThatcham, United Kingdom51-200160 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 1, 2026 · View company records in RevenueBase
3Exact matchLondon, United Kingdom51-200118 contacts →

Exact match

“Bulletproof is now part of WorkNest Secure.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
4Exact matchFarnborough, United Kingdom51-200100 contacts →

Exact match

“As the world becomes more connected, our lives and businesses are more vulnerable.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
5Exact matchWaterloo, United Kingdom51-20080 contacts →

Exact match

“At Reliance Cyber, we believe in truly partnering with our customers.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
6Exact matchLondon, United Kingdom11-5062 contacts →

Exact match

“Atheria Law provides legal services to insurance and reinsurance clients, focusing on the technology, privacy and cyber, and professional liability sectors.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
7Exact matchWorcester, United Kingdom51-20061 contacts →

Exact match

“Many organisations are dealing with multiple frameworks, overlapping tools, disconnected ownership, and increasing pressure from regulators, customers, and boards.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
8Exact matchLondon, United Kingdom51-20055 contacts →

Exact match

“Indisputable skills and a unique super-focused perspective on every single case are the value we create.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
9Exact matchLondon, United Kingdom51-20053 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 1, 2026 · View company records in RevenueBase
10Exact matchLondon, United Kingdom51-20052 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 1, 2026 · View company records in RevenueBase
11Exact matchEdinburgh, United Kingdom201-50052 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
12Exact matchCheadle, United Kingdom51-20042 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
13Exact matchManchester, United Kingdom11-5034 contacts →

Exact match

“Secarma exists to keep the world safe.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
14Exact matchLondon, United Kingdom11-5026 contacts →

Exact match

“Beyond Blue partners with clients to tackle their most complex cyber and resilience challenges.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
15Exact matchLondon, United Kingdom51-20025 contacts →

Exact match

“Encode is now part of Obrela Security Industries collectively delivering cutting edge Cyber Security Services, empowering organizations to better protect against cyber threats.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
16Exact matchPeterborough, United Kingdom51-20024 contacts →

Exact match

“Check Point Partner of the Year 2022 CRN MSSP of the Year 2021 Pentesec has been challenging the status quo in Cyber Security since 2014 when 5 industry veterans decided they were…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
17Exact matchLondon, United Kingdom11-5024 contacts →

Exact match

“Redfox Cybersecurity is a fast-growing cybersecurity consulting firm, spread across 4 countries.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
18Exact matchWelwyn Garden City, United Kingdom11-5023 contacts →

Exact match

“For the past 17 years, we have been successfully empowering our clients to protect their business from cyber-threats and comply with industry standards and regulations.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
19Exact matchUnited Kingdom11-5020 contacts →

Exact match

“One Compliance are data privacy & cyber security specialists that focus on improving our clients security posture so that they can prioritise and mitigate security risks…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
20Exact matchLondon, United Kingdom51-20020 contacts →

Exact match

“IRM, part of the Capgemini Group, works to defend organisations against cyber threats.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
21Exact matchLeeds, United Kingdom11-5019 contacts →

Exact match

“Halo I.S is not just another cybersecurity organization based in the UK; we're a testament to evolution and client-centric innovation.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
22Exact matchLondon, United Kingdom11-5016 contacts →

Exact match

“Barefoot Cyber is the strategic partner for senior leaders who recognize that a cybersecurity attack is not just a technical failure, but a direct threat to their revenue…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
23Exact matchCheltenham, United Kingdom11-5016 contacts →

Exact match

“B10SEC is a company specialising in cybersecurity and data protection services and solutions, headquartered in Gloucestershire, UK, with branches in Portugal, Brazil and Mexico.”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
24Exact matchBirmingham, United Kingdom201-50015 contacts →

Exact match

“Best penetration testing service - Teiss Awards 2024 Managed cloud service winner - Stratus Awards 2023 Security vendor of the year - Computing security excellence awards 2023…”

Recorded in the RevenueBase company graph · Sep 1, 2026 · View company records in RevenueBase
25Exact matchLondon, United Kingdom11-5015 contacts →

Exact match

“We Simplify Cyber Security.”

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

Showing 25 of 406 cybersecurity law firms based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 1,425 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cybersecurity law firms based in the United Kingdom at a glance

As of Sep 1, 2026
30.1%Verified-email coverage
8.7%Mobile-number coverage
11.6Average contacts per company
1-10Median size (employees)
46.8%Largest-city concentration · London
Sep 1, 2026Page data refreshed

Companies by employee count

1-10
255
11-50
117
51-200
26
201-500
4
501-1,000
4

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 “cybersecurity law firms” 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 1,425 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 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.

Cybersecurity law firms 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 “cybersecurity law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cybersecurity law firms are there based in the United Kingdom?

RevenueBase identified 406 company matches for cybersecurity law firms 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?

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

Which city has the most cybersecurity law firms?

London leads with 190 company records, followed by Manchester (17) and Cambridge (6).

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 1,425 professional contacts with verified work emails tracked across these 406 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 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.