Company lists · Data refreshed September 2026

Top 25 Cybersecurity law firms based in London, United Kingdom

Name: Cybersecurity law firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 10, 2026 193 companies tracked

RevenueBase identified 193 cybersecurity law firms headquartered in London, United Kingdom as of September 2026 and tracks 5,611 professional contacts across them, including 2,417 with verified work emails and 337 with mobile numbers. London is the largest hub.

This list covers cybersecurity 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 10, 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 10, 2026 86% judged on-target in blind review

193Companies

5,611Contacts tracked

2,417Verified emails

337Mobile numbers

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The 25 largest cybersecurity law firms based in London, United Kingdom

Ranked by team size

Top 25 of 193 cybersecurity law firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 10, 2026. RevenueBase Smart Search rates how each company's information relates to cybersecurity 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Bird & Bird	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	1,001-5,000	3,187 contacts →
	Partial evidence “Bird & Bird is an international law firm with a focus on helping organisations being changed by technology and the digital world.” Source: RevenueBase Database · checked Sep 10, 2026
2	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 10, 2026
3	White HAT An Epam Company	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	77 contacts →
	Indirect evidence “White Hat, part of the EPAM group, is an award-winning cyber intelligence and offensive security company that leverages an attacker’s perspective to shape innovative, proactive…” Source: RevenueBase Database · checked Sep 10, 2026
4	Hexegic	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	52 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 10, 2026
5	Istari	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	52 contacts →
	Partial evidence “ISTARI is a global cybersecurity firm, established by Temasek in 2020, with a unique model for helping clients build cyber resilience.” Source: RevenueBase Database · checked Sep 10, 2026
6	Hewardmills	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	46 contacts →
	Indirect evidence “HewardMills provides regulatory advice and other specialist Data Protection Officer (DPO) services to multinational organisations.” Source: RevenueBase Database · checked Sep 10, 2026
7	Stuart Miller Solicitors	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	43 contacts →
	Indirect evidence “Stuart Miller Solicitors have been able to exceed their goal of gaining a high reputation among others in the field, an achievement made possible by the high calibre of employees…” Source: RevenueBase Database · checked Sep 10, 2026
8	Cyber Rescue Alliance	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	29 contacts →
	Indirect evidence “Cyber Rescue is a leading specialist in helping Boardroom Executives to measure, monitor and mitigate potential harm from cyber-attacks.” Source: RevenueBase Database · checked Sep 10, 2026
9	Encode	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	25 contacts →
	Indirect evidence “Encode is now part of Obrela Security Industries collectively delivering cutting edge Cyber Security Services, empowering organizations to better protect against cyber threats.” Source: RevenueBase Database · checked Sep 10, 2026
10	Cyxcel	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	22 contacts →
	Indirect evidence “CyXcel is a digital risk advisory firm built for a new era.” Source: RevenueBase Database · checked Sep 10, 2026
11	Secure Purple	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	20 contacts →
	Indirect evidence “Secure Purple is a leading cyber security and digital safety firm that provides innovative solutions and services to help organisations and individuals stay protected in the…” Source: RevenueBase Database · checked Sep 10, 2026
12	Sinevis	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	17 contacts →
	Partial 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 10, 2026
13	Barefoot Cyber	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	16 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 10, 2026
14	Datasixth Consulting	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	51-200	15 contacts →
	Partial evidence “Who We Are DataSixth delivers Cybersecurity Intelligence.” Source: RevenueBase Database · checked Sep 10, 2026
15	IGS Information Governance Services	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	15 contacts →
	Indirect evidence “We are a specialist data protection and data ethics consultancy firm with an expert team of lawyers, consultants and advisors who provide a wide range of data privacy, data…” Source: RevenueBase Database · checked Sep 10, 2026
16	Netrascale	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	15 contacts →
	Partial evidence “At NetraScale, we help businesses navigate the ever-evolving cybersecurity landscape with confidence.” Source: RevenueBase Database · checked Sep 10, 2026
17	Goallsecure	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	13 contacts →
	Indirect evidence “In today’s world, cyber threats are complex and multilayered, so complete protection is not achievable through a single solution or product, that's why GoAllSecure provides a 360°…” Source: RevenueBase Database · checked Sep 10, 2026
18	Socguardians LTD	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	13 contacts →
	Partial evidence “Our mission at SOCGuardians is to empower organizations to operate confidently in a digital world by providing cutting-edge cybersecurity services.” Source: RevenueBase Database · checked Sep 10, 2026
19	Disclosure Cybersecurity	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	11 contacts →
	Partial evidence “Disclosure Cybersecurity Ltd is a specialist cyber security company, formed by professionals with extensive experience and wide exposure in the cyber security market.” Source: RevenueBase Database · checked Sep 10, 2026
20	First Response	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	11 contacts →
	Partial 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 10, 2026
21	2-Sec	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	11 contacts →
	Indirect evidence “At 2\|SEC Consulting, we deliver an end-to-end service of cyber and information security solutions which are tailored to each client’s exact security needs.” Source: RevenueBase Database · checked Sep 10, 2026
22	Privacy Partnership	Partial evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	10 contacts →
	Partial evidence “Data Protection and Privacy Law firm, Training and Consultancy.” Source: RevenueBase Database · checked Sep 10, 2026
23	Thomson Heath Jenkins & Associates	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	11-50	9 contacts →
	Indirect evidence “Leading media, data protection, privacy and defamation solicitors based in London.” Source: RevenueBase Database · checked Sep 10, 2026
24	Coc00n Cyber	Indirect evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	8 contacts →
	Indirect evidence “coc00n secures the personal devices of high-value and high-interest individuals against cyber attacks.” Source: RevenueBase Database · checked Sep 10, 2026
25	Digiphile	Strong evidence	London, United KingdomHQ checked Sep 10, 2026	1-10	8 contacts →
	Strong evidence “Digiphile is a challenger law firm specialising in UK and EU data protection and cybersecurity advice.” Source: RevenueBase Database · checked Sep 10, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: cybersecurity law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names cybersecurity law firms.
Partial evidence: Its own public description names part of cybersecurity law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cybersecurity law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 193 cybersecurity law firms based in London, United Kingdom

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Cybersecurity law firms based in London, United Kingdom at a glance

As of Sep 10, 2026

43.1%Verified-email coverage

6.0%Mobile-number coverage

29.1Average contacts per company

1-10Median size (employees)

98.4%Largest-city concentration · London

Sep 10, 2026Page data refreshed

Companies by employee count

1-10

117

11-50

51-200

201-500

501-1,000

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 12.0d

2,2330–30

17831–60

061–90

190–180

5180+

Company record updated

Median 62.0d

00–30

2,60531–60

2,20161–90

50490–180

301180+

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 cybersecurity 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 “cybersecurity 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 cybersecurity 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 cybersecurity 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, 2,417 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 10, 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.

Cybersecurity law firms by metro in the United Kingdom

Cybersecurity law firms in London190

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 cybersecurity 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 cybersecurity law firms are there based in London, United Kingdom?

RevenueBase identified 193 cybersecurity 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?

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

Which city has the most cybersecurity law firms?

London leads with 190 headquartered companies, 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 the top results, verified emails and direct dials included. Upgrading unlocks all 2,417 verified decision-maker contacts tracked across these 193 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 10, 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.