Company lists · Data refreshed September 2026

Top 25 Forensic cybersecurity firms based in London, United Kingdom

Name: Forensic cybersecurity 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 28, 2026 218 companies tracked

RevenueBase identified 218 forensic cybersecurity firms headquartered in London, United Kingdom as of September 2026 and tracks 3,047 professional contacts across them, including 484 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers forensic cybersecurity 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

218Companies

3,047Contacts tracked

484Verified emails

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

Ranked by team size

Top 25 of 218 forensic cybersecurity 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 forensic cybersecurity 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	Deepcytes Cyber Labs UK	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	177 contacts →
	Indirect evidence “Whether you’re a business or an individual, digital threats to your precious data and assets can come in any form - external or internal.” Source: RevenueBase Database · checked Sep 28, 2026
2	Security Blue Team	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	n/a	171 contacts →
	Indirect evidence “Security Blue Team is now Centri.” Source: RevenueBase Database · checked Sep 28, 2026
3	Bulletproof Cyber Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	123 contacts →
	Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Sep 28, 2026
4	FACT	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	117 contacts →
	Indirect evidence “FACT are at the forefront of investigative and intelligence services, recognised by organisations, law enforcement, and governments worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
5	White HAT An Epam Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
6	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	60 contacts →
	Indirect evidence “We provide deep expertise with technical and business specialists to help clients secure and protect the UK.” Source: RevenueBase Database · checked Sep 28, 2026
7	Detego Global	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	59 contacts →
	Indirect evidence “At Detego Global, we exist to help solve the security challenges of the 21st century.” Source: RevenueBase Database · checked Sep 28, 2026
8	Hexegic	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
9	CYJAX	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	29 contacts →
	Indirect evidence “CYJAX is an award-winning technology company and provider of digital threat intelligence services to international corporations, law enforcement agencies and the public sector.” Source: RevenueBase Database · checked Sep 28, 2026
10	Cyber Rescue Alliance	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
11	Toro Solutions	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “Toro was founded on creating the UK's first Red Team penetration test - and then attacking hundreds of clients by hacking their systems, influencing / social engineering staff and…” Source: RevenueBase Database · checked Sep 28, 2026
12	Kiris Group	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	22 contacts →
	Indirect evidence “Our Chartered Security Professionals seamlessly integrate discreet and effective security into lifestyles and organisations.” Source: RevenueBase Database · checked Sep 28, 2026
13	Iceberg	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	20 contacts →
	Partial evidence “We connect top cybersecurity and eDiscovery talent at Iceberg Cyber Security with the most innovative companies worldwide.” Source: RevenueBase Database · checked Sep 28, 2026
14	Secure Purple	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
15	Tenintelligence	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	19 contacts →
	Indirect evidence “Our continued vision is to be the playmaker in our field; an investigation and protection consultancy, recognised for our diligence, excellence & integrity.” Source: RevenueBase Database · checked Sep 28, 2026
16	Barefoot Cyber	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
17	Datasixth Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	15 contacts →
	Partial evidence “Who We Are DataSixth delivers Cybersecurity Intelligence.” Source: RevenueBase Database · checked Sep 28, 2026
18	Tranchulas	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “Founded in 2006, Tranchulas is a multinational cyber security company having its offices in London, San Francisco, Budapest and Islamabad.” Source: RevenueBase Database · checked Sep 28, 2026
19	Netrascale	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
20	Hacker Academy	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	15 contacts →
	Partial evidence “We Help Your Company Culture to Have a Successful Cybersecurity Posture.” Source: RevenueBase Database · checked Sep 28, 2026
21	Goallsecure	Indirect evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
22	Cyber Armed Security	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “At Cyber Armed Security, we protect organisations worldwide from evolving cyber threats through intelligence-driven ethical hacking.” Source: RevenueBase Database · checked Sep 28, 2026
23	Computer Forensics LAB	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Computer Forensics Lab investigates and analyses computer user behaviour and gathers digital evidence for civil or criminal action.” Source: RevenueBase Database · checked Sep 28, 2026
24	Asceris	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial 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
25	Disclosure Cybersecurity	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 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: forensic cybersecurity 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 forensic cybersecurity firms.
Partial evidence: Its own public description names part of forensic cybersecurity firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name forensic cybersecurity 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 218 forensic cybersecurity firms based in London, United Kingdom

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Forensic cybersecurity firms based in London, United Kingdom at a glance

As of Sep 28, 2026

15.9%Verified-email coverage

14.0Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

122

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

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 218 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 forensic cybersecurity 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 “forensic cybersecurity 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 forensic cybersecurity 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 forensic cybersecurity 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, 484 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 forensic cybersecurity 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 forensic cybersecurity firms are there based in London, United Kingdom?

RevenueBase identified 218 forensic cybersecurity 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?

Deepcytes Cyber Labs UK, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most forensic cybersecurity firms?

London leads the United Kingdom with 218 headquartered companies, followed by Manchester (25) and Cheltenham (12).

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 484 verified decision-maker contacts tracked across these 218 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.