Fundraising Fox

CyLon Ventures

Angel networkInactive

Witney · Pre-Seed–Seed · 10 people tracked

This fund appears to be inactive.

UK Companies House records show CYLON VENTURES LTD (no. 11425266) as dissolved. It is unlikely to be making new investments — this profile is kept for reference and historical accuracy.

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Investment thesis

CyLon Ventures specializes in early-stage investing in security and resilience technology companies across Europe and beyond. The team combines national security experience with nearly a decade of work alongside enterprise security startup founders, having been the first backers of companies like Immersive Labs and Tessian. Rather than operating as a traditional VC fund, CyLon invests its own capital to stay founder-aligned, writing angel-sized cheques. It supports portfolio companies through its network and sector expertise, helping them reach early customers, connect with other investors, and build strategic relationships in a challenging sector.

Source: firm website, verified Aug 3, 2026.

Stage
Pre-Seed–Seed
HQ
Witney, GB
Leads rounds
Follows
Instruments
Equity
Founded
2015
Tracked investments
23

Team · 10 people

from the firm's website

What they invest in

from 15 of 23 portfolio companies

Cybersecurity ×13Enterprise Software ×10AI & Machine Learning ×9SaaS ×9Data & Infrastructure ×5Cloud Computing ×1Developer Tools ×1Energy ×1

HQs:United Kingdom×3United States×3Netherlands×1

Investments · 23 tracked

founders shown can be your intro path
16 Hazyhazy.com

Harry Keen(Founder)in

Co-investorsAlbionVCMetis VenturesNeva Sgr.Notion CapitalUCL Technology Fund

Beauceron
Beauceron Securitybeauceronsecurity.comin𝕏

Beauceron Security offers a security awareness and behavior-change platform that trains employees to adopt safe online habits, with tools for anti-phishing, email analysis, fraud prevention, and MSP/MSSP partners.

CybersecurityEnterprise SoftwareSaaS

Co-investorsBankTech VenturesEast Valley VenturesNew Brunswick Innovation Foundation

Cado Securitycadosecurity.comin𝕏

Cado Security provides cloud-native forensics and incident response automation that captures disk-level evidence across multi-cloud environments.

Cloud ComputingCybersecurityDeveloper ToolsEnterprise Software

Co-investorsBallistic VenturesBlossom CapitalTen Eleven

Digdig.security

Acquired by Palo Alto Networks

Dan Benjamin(Founder)in

Co-investorsSelah VenturesSignalFire

Fenix24fenix24.cominFeb 2023

Chattanooga, US

John Anthony Smith(Executive Officer, Director, Promoter)Michael Webb(Executive Officer)Mark Grazman(Executive Officer, Director, Promoter)

BoardZach Powell(Director)in

Co-investorsCyber Mentor FundEos Venture Partners Limited

Gisualgisual.comin

Gisual provides an API that delivers near real-time commercial power outage data into network operations tools, letting telecoms and managed service providers automatically triage outage issues, attribute problems to power rather than network, and avoid unnecessary truck rolls.

Data & InfrastructureEnergySaaS

Co-investorsInvariantes FundThird Sphere

Hadrianhadrian.ioin

Hadrian offers an offensive security platform that continuously maps an organization's external attack surface, discovers assets, and uses agentic AI to validate which exposures are actually exploitable.

AI & Machine LearningCybersecurityEnterprise SoftwareSaaSAmsterdam, NL

Rogier Fischer(Co-Founder & CEO)inOlivier Beg(Co-Founder & Chief Hacking Officer)inMaurice Clin(Co-Founder & Head of Business Development)Tijl van Vliet(Co-Founder)

Co-investorsCapitalGConstruct CapitalLux CapitalPICUS CAPITAL137 Ventures1789 Capital+7 more

Hazyhazy-ai.com

Hazy provides a data-sharing platform with built-in GDPR-compliant legal agreements, access controls, and audit logs to help businesses share customer data responsibly.

AI & Machine LearningCybersecurityData & Infrastructure

Harry Keen(Founder)in

Co-investorsM12 (Microsoft's Venture Fund)Notion Capital

Immersive Labsimmersivelabs.comin𝕏

Immersive Labs provides cybersecurity training and labs where teams practice response to emerging threats and current attacker methods.

AI & Machine LearningCybersecurityEnterprise Software

James Hadley(Founder)in

BoardJack Huffard(Chairman of the Board)

Co-investorsInsight PartnersSummit PartnersMenlo VenturesTen Eleven

Mondoomondoo.ioin𝕏

Mondoo offers an agentic managed vulnerability service that pairs an AI-native security platform with a team of security experts to find, prioritize, and remediate vulnerabilities and misconfigurations across cloud, on-prem, endpoints, SaaS, containers, and the SDLC.

AI & Machine LearningCybersecuritySaaS

Co-investorsAtomicofirstminute capitalHV CapitalSystem.One

Risk Ledgerriskledger.comin𝕏

Risk Ledger builds a third-party risk management platform that connects organizations to monitor and manage cybersecurity risks in their supply chains.

CybersecurityEnterprise SoftwareSaaSLondon, GB

Haydn BrooksDaniel Saul

Co-investorsEpisode1Lifeline Ventures

Seedataseedata.io

Enrico Faccioli(Founder)in

Co-investorsAviso VenturesAxeleo CapitalOctopus Ventures

Senseonsenseon.ioin𝕏

SenseOn provides a security operations platform that unifies existing tools (SIEM, EDR, identity, cloud) into a single investigation plane, using cross-domain correlation and AI-accelerated incident resolution under human approval.

AI & Machine LearningCybersecuritySaaSLondon, GB

David Atkinson(Founder)

Co-investorsCrane Venture PartnersForgePoint CapitalMMC VenturesTempoCapVentura Capital

Silent Pushsilentpush.comin𝕏

Silent Push operates a proprietary scanning and aggregation engine that logs changes across the entire IPv4 and IPv6 space, providing security teams with pre-evaluated first-party data and query functionality to track and monitor attacker infrastructure.

CybersecurityData & InfrastructureSaaSReston, US

Kenneth Bagnall(Executive Officer, Director)Tim Dawson(Director)in

BoardDavid Palmer(Director)inFrank Verdecanna(Director)inJohn Jensen(Director)in

Co-investorsTen ElevenStepstone Group

Soverensoveren.ioin

Soveren provides data discovery, monitoring, and intelligence tools that help companies manage sensitive data in compliance with regulations and business rules.

CybersecurityData & InfrastructureEnterprise SoftwareSaaS

Co-investorsSemapa Next10x Founders

Teleskopeteleskope.aiinNov 2023

Teleskope offers a data security platform with a "Data Reasoning Layer" that discovers, classifies, and automatically remediates sensitive data exposure across an organization's environment.

AI & Machine LearningCybersecurityData & InfrastructureEnterprise SoftwareNew York, US

Elizabeth Nammour(Executive Officer, Director, Promoter)inJulie Trias(Director)

BoardBrian Schechter(Director)in

Co-investorsA'Z AngelsPrimary Venture PartnersEssence Venture Capital

Tessiantessian.comin𝕏

Tessian provides AI-powered email security solutions that detect and prevent email-based cyberattacks and data loss for enterprises.

AI & Machine LearningCybersecurityEnterprise Software

Tim Sadler(Founder & CEO)Edward Bishop(Founder)in

Co-investorsAccelBalderton CapitalForgePoint CapitalFraserMarch Capital PartnersSozo Ventures+5 more

Vena Securityvenasecurity.comin

Vena Security provides an agentic exposure management platform that uses AI agents to continuously discover, investigate, and neutralize security exposures across identity, attack surface, and control gaps.

AI & Machine LearningCybersecurityEnterprise Software

Worldrworldr.com
Xapienxapien.comin𝕏

Xapien offers an AI-powered due diligence platform that automates background checks and third-party risk research, searching the indexed internet and other data sets to produce sourced reports.

AI & Machine LearningEnterprise SoftwareSaaS

Co-investorsDouble DownFounders FactoryFounders Factory NY

Zamnazamna.com

Co-investorsOxford

Portfolio news

latest coverage across their companies

Principals & officers · per Companies House

what is this? ⓘ
Neil Christopher Redvers Crocker

Director · British · since 2018

Ownership & control

Neil Christopher Redvers Crockerright to appoint and remove directors

Frequently asked questions

How many investments has CyLon Ventures made?
CyLon Ventures has 23 tracked investments.
What stage does CyLon Ventures invest at?
CyLon Ventures invests at the Pre-Seed, Seed stages.
What sectors does CyLon Ventures focus on?
CyLon Ventures focuses on Cybersecurity, Deep Tech, Defense Tech.
Where is CyLon Ventures located?
CyLon Ventures is headquartered in Witney, GB.
Does CyLon Ventures lead rounds?
CyLon Ventures typically participates in rounds rather than leading them.
Who does CyLon Ventures co-invest with?
CyLon Ventures most often shares deals with Eos Venture Partners Limited, ForgePoint Capital, Seedcamp, among 46 tracked co-investors.

Images

CyLon Ventures photo

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