Company lists · Data verified August 2026

Top 25 Api security companies based in London, United Kingdom

Name: Api 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 160 companies tracked

There are 160 api security companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 2,037 professional contacts across them, including 274 with verified work emails and 186 with mobile numbers. London is the largest hub.

This list covers api 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.

160Companies

2,037Contacts tracked

274Verified emails

186Mobile numbers

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The 25 largest api security companies based in London, United Kingdom

Ranked by team size

Top 25 of 160 api 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	Bulletproof Cyber Security	London	51-200	118	75
2	Riversafe	London	11-50	55	1
3	Hexegic	London	51-200	52	30
4	Equixly	London	11-50	28	21
5	Encode	London	51-200	25	9
6	Redfox Cybersecurity	London	11-50	24	6
7	Ssl247 A Sectigo Company	London	51-200	24	1
8	Toro Solutions	London	11-50	23	17
9	Secure Purple	London	11-50	20	2
10	th4ts3cur1ty.company	London	11-50	19	13
11	CST Limited Computer Security Technology	London	11-50	17	2
12	Eh1-Infotech Cybersecurity	London	11-50	15	1
13	Datasixth Consulting	London	51-200	14	7
14	Netrascale	London	11-50	14	2
15	Socguardians LTD	London	11-50	12	1
16	Disclosure Cybersecurity	London	11-50	11	7
17	Secureteam LTD	London	11-50	10	5
18	Certified Nerds Cyber Security Company	London	11-50	6	2
19	Rexel Cybersecurity	London	11-50	5	1
20	Safetech Innovations Global Services UK US	London	51-200	4	2
21	River Oakfield	London	11-50	4	2
22	Grove Group	London	51-200	3	3
23	Sense Defence AI	London	51-200	2	1
24	Cansol Consulting	London	11-50	2	1
25	Cybergate LTD	London	11-50	2	1

Showing 25 of 160 api security companies based in London, United Kingdom

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Api security companies based in London, United Kingdom at a glance

As of Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 160 HQs

186Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Api security companies by metro in the United Kingdom

Metro	Companies
Api security companies in London	160
Api security companies in Manchester	18
Api security companies in Cheltenham	12
Api security companies in Birmingham	10
Api security companies in Milton Keynes	5
Api security companies in Edinburgh	5
Api security companies in Cambridge	5

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 “api 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; 0 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 api security companies are there based in London, United Kingdom?

There are 160 api security companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

Bulletproof Cyber Security, headquartered in London, tops this list with the largest team on record.

Which city has the most api security companies?

London leads with 160 headquartered companies, followed by Manchester (18) 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 274 verified decision-maker contacts tracked across these 160 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.