Company lists · Data refreshed September 2026

Top 23 Cryptography consulting firms based in London, United Kingdom

Name: Cryptography consulting 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 9, 2026 100 companies tracked

RevenueBase identified 100 cryptography consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 431 professional contacts across them, including 97 with verified work emails and 15 with mobile numbers. London is the largest hub.

This list covers cryptography consulting 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 9, 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 9, 2026 86% judged on-target in blind review

100Companies

431Contacts tracked

97Verified emails

15Mobile numbers

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The 23 largest cryptography consulting firms based in London, United Kingdom

Ranked by team size

Top 23 of 100 cryptography consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 9, 2026. RevenueBase Smart Search rates how each company's information relates to cryptography consulting 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	Caretower An Integrity360 Company	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	201-500	97 contacts →
	Indirect evidence “As an independent IT security specialist, Caretower provide comprehensive solutions to individual problems, thus allowing our recommendations to be unbiased.” Source: RevenueBase Database · checked Sep 9, 2026
2	Daintta	Indirect evidence	London, United KingdomHQ checked Sep 9, 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 9, 2026
3	Acubed IT	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	11 contacts →
	Indirect evidence “At Acubed IT, we design and deliver secure, scalable, and innovative technology solutions across the National Security, Defence, and Public Sector ecosystems.” Source: RevenueBase Database · checked Sep 9, 2026
4	Disclosure Cybersecurity	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	11 contacts →
	Indirect 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 9, 2026
5	2-Sec	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	11 contacts →
	Partial 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 9, 2026
6	Stratia Cyber	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	8 contacts →
	Indirect evidence “Stratia Cyber is an independent, technology agnostic company providing high quality, pragmatic cyber security consultancy and expertise, is a founder member of the NCSC Certified…” Source: RevenueBase Database · checked Sep 9, 2026
7	Kloudwerk	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	7 contacts →
	Partial evidence “Kloudwerk offers a game-changing approach to cyber security consulting for SMEs.” Source: RevenueBase Database · checked Sep 9, 2026
8	Krestfield Limited	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	4 contacts →
	Indirect evidence “Krestfield is a UK-based provider of enterprise-grade PKI and certificate management software.” Source: RevenueBase Database · checked Sep 9, 2026
9	River Oakfield	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	4 contacts →
	Indirect evidence “River Oakfield is a global cyber security firm which provides tailored solutions to individuals, business leaders and enterprise clients.” Source: RevenueBase Database · checked Sep 9, 2026
10	Cynance	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	4 contacts →
	Partial evidence “Cynance is a business-driven cybersecurity and data protection consulting and Cyber tech reselling firm, trusted by organizations across the UK, EU, and worldwide.” Source: RevenueBase Database · checked Sep 9, 2026
11	Forensic Control	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	4 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 9, 2026
12	E-Venture Business Solutions	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	3 contacts →
	Indirect evidence “Driving Success in the Digital and Global Arena: E-Venture Business Solutions brings together expert-led services in Cybersecurity Governance, Digital Payment Solutions, and…” Source: RevenueBase Database · checked Sep 9, 2026
13	Mitmark Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	3 contacts →
	Indirect evidence “With roots in the armed services, MITMARK provides corporate security and intelligence support to governments, multinationals and private clients.” Source: RevenueBase Database · checked Sep 9, 2026
14	DLP Assured	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	51-200	2 contacts →
	Indirect evidence “DLP Assured work with enterprise customers to mitigate the threat from fraud on ecommerce systems, to mitigate the treat from insider attack and using leading edge technology to…” Source: RevenueBase Database · checked Sep 9, 2026
15	Sesseto Limited	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	2 contacts →
	Indirect evidence “Good security consultants are difficult to find, expensive to employ and hard to keep, but we believe that your business doesn’t have to incur a high cost of delivery in order to…” Source: RevenueBase Database · checked Sep 9, 2026
16	Essential Security UK LTD	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	2 contacts →
	Indirect evidence “Essential Security is a unique company in that we offer a specialised and confidential service meeting your bespoke technological and communications requirements.” Source: RevenueBase Database · checked Sep 9, 2026
17	Monsevo	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	2 contacts →
	Partial evidence “Boutique consultancy leveraging top-notch expertise in reverse engineering and cryptography to change the conversation around the benefits of cybersecurity.” Source: RevenueBase Database · checked Sep 9, 2026
18	Tendo Solutions	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	2 contacts →
	Indirect evidence “Tendo Solutions is an intelligence-based security company, specialising in corporate due diligence, investigations, research and risk analysis, forensics, horizon scanning and…” Source: RevenueBase Database · checked Sep 9, 2026
19	Netscylla Cyber Security LTD	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	2 contacts →
	Indirect 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 9, 2026
20	Evasec LTD	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	1-10	2 contacts →
	Indirect evidence “We are an Information Security Consultancy specialised in the fields of Information Security Management, IT Security Architecture, Intellectual Property Protection and Digital…” Source: RevenueBase Database · checked Sep 9, 2026
21	EST Applied Intelligence	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	201-500	1 contacts →
	Indirect evidence “EST Applied Intelligence is a specialist enterprise security consultancy dedicated to building strategic resilience in an increasingly complex digital world.” Source: RevenueBase Database · checked Sep 9, 2026
22	Compliancelogic LTD	Indirect evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	1 contacts →
	Indirect evidence “ComplianceLogic Ltd is driven by the collective leadership and expertise of every member of our team.” Source: RevenueBase Database · checked Sep 9, 2026
23	Atlan Digital R&d Limited	Partial evidence	London, United KingdomHQ checked Sep 9, 2026	11-50	1 contacts →
	Partial evidence “Offensive security consulting for consultancies, MSSPs, corporates & governments.” Source: RevenueBase Database · checked Sep 9, 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: cryptography consulting 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 cryptography consulting firms.
Partial evidence: Its own public description names part of cryptography consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name cryptography consulting 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 23 of 100 cryptography consulting firms based in London, United Kingdom

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Cryptography consulting firms based in London, United Kingdom at a glance

As of Sep 9, 2026

22.5%Verified-email coverage

3.5%Mobile-number coverage

4.3Average contacts per company

1-10Median size (employees)

130.0%Largest-city concentration · London

Sep 9, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

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

Email last verified

Median 12.0d

880–30

931–60

061–90

090–180

0180+

Company record updated

Median 74.0d

00–30

15831–60

19861–90

4690–180

29180+

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 cryptography consulting 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 “cryptography consulting 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 cryptography consulting 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 cryptography consulting 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, 97 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 9, 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.

Cryptography consulting firms by metro in the United Kingdom

Cryptography consulting firms in London130

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 cryptography consulting 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 cryptography consulting firms are there based in London, United Kingdom?

RevenueBase identified 100 cryptography consulting 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?

Caretower An Integrity360 Company, headquartered in London, tops this list with the largest team on record.

Which city has the most cryptography consulting firms?

London leads with 130 headquartered companies, followed by Cambridge (8) and Bristol (7).

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 97 verified decision-maker contacts tracked across these 100 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 9, 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.