Company lists · Data refreshed August 2026

Top 25 AI security software companies based in London, United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Aug 30, 2026 124 companies tracked

There are 124 AI security software companies headquartered in London, United Kingdom (RevenueBase, August 2026). RevenueBase tracks 1,592 professional contacts across them, including 542 with verified work emails and 113 with mobile numbers. London is the largest hub.

This list covers AI security software 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. Every row shows the company's own description, how directly it supports the match, and when it was last checked. Data refreshed August 30, 2026.

124Companies

1,592Contacts tracked

542Verified emails

113Mobile numbers

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The 25 largest AI security software companies based in London, United Kingdom

Ranked by team size

Top 25 of 124 AI security software companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Aug 30, 2026. Evidence rates how directly each company's own description names AI security software companies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts	Verified emails
1	Prevalent AIPartial evidence “Prevalent AI is an AI-powered data fabric company, founded by GCHQ alumni, practitioners who spent their careers solving high-stakes intelligence problems in complex environments.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	175	101
2	Cipher سايڤرPartial evidence “At Cipher, we're redefining digital security as the premier cybersecurity leader in the Middle East.” Source: company website · checked Aug 30, 2026	London, United Kingdom	201-500	135	50
3	CybersmartIndirect evidence “Cybersecurity should be simple.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	83	55
4	WatchtowrPartial evidence “watchTowr is the AI-driven Preemptive Exposure Management capability trusted by Fortune 500 companies and critical infrastructure providers.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	59	22
5	CloudmarkIndirect evidence “Cloudmark was acquired by Proofpoint.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	54	18
6	SenseonIndirect evidence “SenseOn deploys alongside all of your existing tools, unifying them into a single investigation plane and augmenting your team with cross-domain correlation, analytics, and…” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	52	24
7	CybaversePartial evidence “The all-in-one cyber security platform that grows with you.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	40	23
8	NothreatPartial evidence “The future of IoT/OT security is here.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	36	16
9	Redhunt LabsStrong evidence “RedHunt Labs is a research-driven cybersecurity company delivering Continuous Threat Exposure Management (CTEM), PTaaS, and AI Exposure Security.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	35	20
10	CYJAXIndirect evidence “CYJAX is an award-winning technology company and provider of digital threat intelligence services to international corporations, law enforcement agencies and the public sector.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	30	18
11	BeamsecPartial evidence “BeamSec is a UK-based cybersecurity provider delivering autonomous agents for continuous compliance and AI-powered human risk management, eliminating thousands of manual hours…” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	26	10
12	RiskprofilerIndirect evidence “RiskProfiler is a leading global provider of external threat intelligence, helping organizations stay ahead of cyber threats by identifying risks before they escalate into attacks.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	26	5
13	EncodePartial evidence “Encode is now part of Obrela Security Industries collectively delivering cutting edge Cyber Security Services, empowering organizations to better protect against cyber threats.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	25	9
14	MindgardStrong evidence “Mindgard is the leading provider of AI Security solutions.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	24	15
15	Athenian TechIndirect evidence “Athenian Tech Ltd.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	22	10
16	BlackfogPartial evidence “BlackFog is a global leader in AI-based cybersecurity and the pioneer of anti data exfiltration (ADX) technology.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	21	17
17	CybersiftIndirect evidence “At Cybersift, we believe cybersecurity should be intelligent, accessible, and built to empower everyone.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	19	11
18	VizgardPartial evidence “Vizgard is a multi-award-winning SME building a safer future by automating real-time Security and Defence optical systems that traditionally require repetitive or prolonged…” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	14	10
19	Datasixth ConsultingIndirect evidence “Who We Are DataSixth delivers Cybersecurity Intelligence.” Source: company website · checked Aug 30, 2026	London, United Kingdom	51-200	14	7
20	NetrascaleIndirect evidence “At NetraScale, we help businesses navigate the ever-evolving cybersecurity landscape with confidence.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	14	2
21	PraeferreStrong evidence “Praeferre is an AI-powered cybersecurity company, backed by SFC Capital, shaping the future of business security and compliance.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	13	2
22	PC Power International LTDPartial evidence “PC POWER INTERNATIONAL LTD is a computer & network security company based in the City, London, United Kingdom.” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	10	8
23	CyberseerPartial evidence “Cyberseer offers Advanced Threat Detection and a 24×7 Managed Security Service (MSS).” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	8	7
24	Elemendar- Making Intelligence ActionableIndirect evidence “Elemendar develops Artificial Intelligence which reads cyber threat reports (CTI) authored by humans and instantly translates them into industry-standard machine-readable and…” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	8	4
25	RiskxchangePartial evidence “RiskXchange is an information security technology company, that helps companies of all sizes fight the threat of cyber threats by providing instant risk ratings for any company…” Source: company website · checked Aug 30, 2026	London, United Kingdom	11-50	8	2

Showing 25 of 124 AI security software companies based in London, United Kingdom

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AI security software companies based in London, United Kingdom at a glance

As of Aug 30, 2026

11-50Median size (employees)

LondonLargest hub · 124 HQs

113Contacts with mobile numbers

Aug 30, 2026Data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

AI security software companies by metro in the United Kingdom

Metro	Companies
AI security software companies in London	124
AI security software companies in Manchester	7
AI security software companies in Edinburgh	4
AI security software companies in Cheltenham	4
AI security software companies in Bristol	3
AI security software companies in Oxford	3
AI security software companies in Leicester	3

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 AI security software companies, so some rows will be adjacent to the category rather than pure plays. The description and evidence rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “AI security software companies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among AI security software companies, 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 an evidence rating so you can judge each match yourself.
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, 542 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 August 30, 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.

Frequently asked

How many AI security software companies are there based in London, United Kingdom?

There are 124 AI security software companies headquartered in London, United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most AI security software companies?

London leads with 124 headquartered companies, followed by Manchester (7) and Edinburgh (4).

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 542 verified decision-maker contacts tracked across these 124 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 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.