Company lists · Data verified August 2026

Top 25 Big data security companies based in London, United Kingdom

Name: Big data security companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 58 companies tracked

There are 58 big data security companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 4,441 professional contacts across them, including 2,760 with verified work emails and 1,506 with mobile numbers. London is the largest hub.

This list covers big data security companies headquartered in London, 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.

58Companies

4,441Contacts tracked

2,760Verified emails

1,506Mobile numbers

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The 25 largest big data security companies based in London, United Kingdom

Ranked by team size

Top 25 of 58 big data security companies based in London, 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	Sailpoint	London	1,001-5,000	3,059	1,979
2	Netwrix Corporation	London	501-1,000	799	550
3	Futurex	London	51-200	147	76
4	Cryptomathic	London	51-200	77	46
5	Garrison NOW A Part Of Everfox	London	51-200	59	2
6	Hexegic	London	51-200	52	30
7	MPCH	London	11-50	42	17
8	TES Enterprise Solutions	London	11-50	16	12
9	Disclosure Cybersecurity	London	11-50	11	7
10	PC Power International LTD	London	11-50	10	8
11	Simplified Solutions	London	11-50	10	4
12	Aiverz Technologies , Dubai & London, UK	London	11-50	10	2
13	Fusionexperience LTD	London	1-10	9	2
14	Gospel Technology	London	11-50	7	2
15	Vigil8 Partners Limited	London	1-10	6	3
16	Strata	London	1-10	5	5
17	DB Cybertech	London	51-200	5	1
18	Grove Group	London	51-200	3	3
19	Besecureonline	London	1-10	3	2
20	Stryke	London	1-10	3	1
21	Dark Taurus	London	1-10	3	1
22	DLP Assured	London	51-200	2	2
23	Checksec	London	1-10	2	1
24	Essential Security UK LTD	London	1-10	2	1
25	soc.os	London	11-50	1	1

Showing 25 of 58 big data security companies based in London, United Kingdom

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Big data security companies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 26 HQs

1,506Contacts with mobile numbers

6Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

Big data security companies by metro in the United Kingdom

Metro	Companies
Big data security companies in London	26
Big data security companies in Milton Keynes	2
Big data security companies in Reading	1
Big data security companies in Newport	1
Big data security companies in Marlow Bucks	1
Big data security companies in Manchester	1
Big data security companies in Blandford	1
Big data security companies in Glasgow	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 “big data security companies”, with match quality audited by blind human judging, and headquartered in London, 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; 6 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 big data security companies are there based in London, United Kingdom?

There are 58 big data security companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most big data security companies?

London leads with 26 headquartered companies, followed by Milton Keynes (2) and Reading (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 2,760 verified decision-maker contacts tracked across these 58 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.