Company lists · Data verified August 2026

Top 17 Blockchain security firms based in the United Kingdom

Name: Blockchain security 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 51 companies tracked

There are 51 blockchain security firms headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 210 professional contacts across them, including 75 with verified work emails and 13 with mobile numbers. London is the largest hub.

This list covers blockchain security 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.

51Companies

210Contacts tracked

75Verified emails

13Mobile numbers

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The 17 largest blockchain security firms based in the United Kingdom

Ranked by team size

Top 17 of 51 blockchain security 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	Coincover	London	51-200	43	31
2	The Blockhouse Technology LTD	Oxford	11-50	28	19
3	Vibranium Audits	London	11-50	14	1
4	Cykube	London	11-50	9	1
5	Web3workx	London	1-10	9	1
6	Opencover	London	11-50	6	5
7	Secure Debug	Cranfield	11-50	6	2
8	Fidesium	London	1-10	5	3
9	Spade Tech	Edinburgh	11-50	5	2
10	TECXA	London	11-50	5	1
11	extropy.io	Oxford	1-10	4	2
12	Pyramid Ledger	Milton Keynes	11-50	3	1
13	Uncloak	London	1-10	3	1
14	HYDN	London	11-50	2	2
15	Dedsol	London	1-10	1	1
16	Sentnl Blockchain Security Auditor	High Wycombe	1-10	1	1
17	Onchain Industries	London	1-10	1	1

Showing 17 of 51 blockchain security firms based in the United Kingdom

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Blockchain security firms based in the United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 32 HQs

13Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Blockchain security firms by metro

Metro	Companies
Blockchain security firms in London	32
Blockchain security firms in Oxford	3
Blockchain security firms in Cambridge	1
Blockchain security firms in Littlehampton	1
Blockchain security firms in Milton Keynes	1
Blockchain security firms in Dunstable	1
Blockchain security firms in Bristol	1

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 “blockchain security 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 blockchain security firms are there based in the United Kingdom?

There are 51 blockchain security firms headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most blockchain security firms?

London leads with 32 headquartered companies, followed by Oxford (3) and Cambridge (1).

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 75 verified decision-maker contacts tracked across these 51 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.