Company lists · Data refreshed August 2026
Top 25 AI cybersecurity companies based in London, United Kingdom
RevenueBase identified 233 AI cybersecurity companies headquartered in London, United Kingdom as of August 2026 and tracks 5,205 professional contacts across them, including 1,169 with verified work emails and 740 with mobile numbers. London is the largest hub.
This list covers AI cybersecurity 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 29, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest AI cybersecurity companies based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 635 contacts → | ||||
Indirect evidence “Everfox delivers trusted connectivity to protect the world's most critical environments, safeguarding the sensitive information behind decision advantage.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 2 | 614 contacts → | ||||
Partial evidence “WithSecure™ is Europe's cybersecurity partner of choice.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 3 | 237 contacts → | ||||
Strong evidence “Qodea, powered by Beyond, are a technology group building the world's leading cloud and cybersecurity solutions, from foundational infrastructure to advanced AI.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 4 | 188 contacts → | ||||
Indirect evidence “Headquartered in London U.K, Gorilla is a global solution provider in Security Intelligence, Network Intelligence, Business Intelligence and IoT technology.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 5 | 175 contacts → | ||||
Partial 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: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 6 | 118 contacts → | ||||
Indirect evidence “Bulletproof is now part of WorkNest Secure.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 7 | 83 contacts → | ||||
Partial evidence “Cybersecurity should be simple.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 8 | 63 contacts → | ||||
Indirect evidence “Cyro Cyber are your cyber security Guardians.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 9 | 59 contacts → | ||||
Partial evidence “watchTowr is the AI-driven Preemptive Exposure Management capability trusted by Fortune 500 companies and critical infrastructure providers.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 10 | 59 contacts → | ||||
Partial evidence “Garrison is a London-based cybersecurity company founded in 2014 by David Garfield (CEO) and Henry Harrison (Chief Scientist).” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 11 | 52 contacts → | ||||
Indirect evidence “At Hexegic we are not just passionate about protecting data through our Cyber services we are passionate about helping companies release the potential of the data they hold…” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 12 | 52 contacts → | ||||
Indirect 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: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 13 | 40 contacts → | ||||
Indirect evidence “The all-in-one cyber security platform that grows with you.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 14 | 36 contacts → | ||||
Indirect evidence “The future of IoT/OT security is here.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 15 | 35 contacts → | ||||
Strong evidence “RedHunt Labs is a research-driven cybersecurity company delivering Continuous Threat Exposure Management (CTEM), PTaaS, and AI Exposure Security.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 16 | 32 contacts → | ||||
Indirect evidence “Your partner in cyber security talent, investment and events.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 17 | 32 contacts → | ||||
Indirect evidence “Founded in 2006, Torrid Networks has been able to establish strong credentials in the area of cyber security products, research, consulting, managed services, education and staff…” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 18 | 30 contacts → | ||||
Indirect evidence “DNSSense, positioned under Noventiq during 2024–2025, completed a 100% local-ownership restructuring in 2025 and evolved into a Turkey-based, R&D-driven DNS security company.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 19 | 26 contacts → | ||||
Strong 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: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 20 | 25 contacts → | ||||
Indirect 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: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 21 | 24 contacts → | ||||
Partial evidence “Mindgard is the leading provider of AI Security solutions.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 22 | 24 contacts → | ||||
Partial evidence “Redfox Cybersecurity is a fast-growing cybersecurity consulting firm, spread across 4 countries.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 contacts → | ||||
Indirect evidence “Secure.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 24 | 22 contacts → | ||||
Indirect evidence “Athenian Tech Ltd.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
| 25 | 21 contacts → | ||||
Strong evidence “BlackFog is a global leader in AI-based cybersecurity and the pioneer of anti data exfiltration (ADX) technology.” Source: RevenueBase Database · checked Aug 29, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: AI cybersecurity companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names AI cybersecurity companies.
- Partial evidence
- Its own public description names part of AI cybersecurity companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name AI cybersecurity companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 233 AI cybersecurity companies based in London, United Kingdom
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AI cybersecurity companies based in London, United Kingdom at a glance
As of Aug 29, 2026Companies by employee count
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 cybersecurity companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in London, United Kingdom whose own description of what they do matches “AI cybersecurity companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names AI cybersecurity companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among AI cybersecurity 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 its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- 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, 1,169 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 29, 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.
AI cybersecurity companies by metro in the United Kingdom
- AI cybersecurity companies in London233
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names AI cybersecurity companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many AI cybersecurity companies are there based in London, United Kingdom?
RevenueBase identified 233 AI cybersecurity companies headquartered in London, United Kingdom as of August 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Everfox, headquartered in London, tops this list with the largest team on record.
Which city has the most AI cybersecurity companies?
London leads with 233 headquartered companies, followed by Manchester (18) and Birmingham (9).
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 1,169 verified decision-maker contacts tracked across these 233 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 29, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 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 with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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