Company lists · Data verified August 2026

Top 25 Cryptography consulting firms based in the United Kingdom

Name: Cryptography consulting firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 314 companies tracked

There are 314 cryptography consulting firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,641 professional contacts across them, including 621 with verified work emails and 78 with mobile numbers. London is the largest hub.

This list covers cryptography consulting firms headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

314Companies

1,641Contacts tracked

621Verified emails

78Mobile numbers

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The 25 largest cryptography consulting firms based in the United Kingdom

Ranked by team size

Top 25 of 314 cryptography consulting firms based in the United Kingdom, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Cybersec Consulting	London	201-500	141	76
2	Amethyst Risk Management	Farnborough	11-50	84	26
3	Cryptomathic	London	51-200	77	46
4	Saepio Information Security	High Wycombe	51-200	73	57
5	Daintta	London	51-200	61	18
6	MDSEC	Macclesfield	11-50	60	33
7	Cyberlab	Lincoln	51-200	56	41
8	EMSEC	Bristol	11-50	53	8
9	Omnicyber Security	Solihull	11-50	31	19
10	Cyber Security Specialists	Altrincham Manchester	11-50	27	9
11	I3secure LTD	Bristol	11-50	24	14
12	Redfox Cybersecurity	London	11-50	24	6
13	LMS Security	London	11-50	20	16
14	Rightcue	Basingstoke	11-50	20	11
15	Pureid	Royston	11-50	20	11
16	Razorthorn Security	Tunbridge Wells	11-50	18	14
17	DEV Null Security	Edinburgh	11-50	17	10
18	Protirus	Newcastle Upon Tyne	11-50	15	9
19	Salient Ediscovery	London	51-200	13	10
20	Ansec Consulting	Antrim	11-50	12	8
21	Securious	Exeter	11-50	12	8
22	Acubed IT	London	11-50	11	6
23	2-Sec	London	11-50	11	5
24	Stratia Cyber	London	11-50	9	3
25	Cyberbase Consulting	Weybridge	11-50	9	2

Showing 25 of 314 cryptography consulting firms based in the United Kingdom

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Cryptography consulting firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 130 HQs

78Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

227

11-50

51-200

201-500

501-1,000

Cryptography consulting firms by metro

Metro	Companies
Cryptography consulting firms in London	130
Cryptography consulting firms in Cambridge	8
Cryptography consulting firms in Bristol	7
Cryptography consulting firms in Manchester	6
Cryptography consulting firms in Edinburgh	5
Cryptography consulting firms in Swindon	4
Cryptography consulting firms in Reading	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “cryptography consulting firms”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many cryptography consulting firms are there based in the United Kingdom?

There are 314 cryptography consulting firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Cybersec Consulting, 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 621 verified decision-maker contacts tracked across these 314 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.