CyLon Ventures
Angel networkInactiveWitney · 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.
Find your way into CyLon Ventures
15 people in our graph share verified history with the CyLon Ventures team — schools, employers, funds. One of them is your warm intro.
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.
Team · 10 people
from the firm's website
What they invest in
from 15 of 23 portfolio companiesCybersecurity ×13Enterprise Software ×12AI & Machine Learning ×9SaaS ×9Data & Infrastructure ×5Developer Tools ×2Cloud Computing ×1Energy ×1
HQs:United States×5United Kingdom×3Netherlands×1
Who they back
founder profiles across 9 portfolio companiesFounding team size:solo founder×62 founders×24+ founders×1
Where their founders studiedfrom 12 founders with education data
Imperial College London ×3London Business School ×2
What their founders studiedfrom 12 founders with field-of-study data
Computer Science ×5Engineering ×4Business & Management ×3
Investments · 23 tracked
founders shown can be your intro pathHarry Keen(Founder)in
Co-investorsAlbionVCMetis VenturesNeva Sgr.Notion CapitalUCL Technology Fund
Beauceron Security provides anti-phishing and security awareness training software designed to reduce employee vulnerability to cyber threats.
CybersecurityEnterprise SoftwareSaaS
Co-investorsBankTech VenturesEast Valley VenturesNew Brunswick Innovation Foundation
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
Acquired by Palo Alto Networks
Dan Benjamin(Founder)in
Co-investorsSelah VenturesSignalFireAvilaAzolla VenturesBaukunstKoa Labs+1 more
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
Gisual uses data intelligence to diagnose network device issues for telecommunications companies, helping them reduce repair time and improve first-contact resolution during outages and disasters.
Data & InfrastructureEnergyEnterprise SoftwareSaaSPhiladelphia, US
Co-investorsInvariantes FundThird Sphere
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)inTijl van Vliet(Co-Founder)in
Co-investorsCapitalGConstruct CapitalLux CapitalPICUS CAPITAL137 Ventures1789 Capital+7 more
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 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)in
Co-investorsInsight PartnersSummit PartnersMenlo VenturesTen Eleven
Mondoo provides autonomous vulnerability management and remediation for enterprise IT infrastructure, using AI and automation to eliminate security issues at scale.
AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareSaaS
Soo Choi-Andrews(Co-Founder & CEO)in
Co-investorsAtomicofirstminute capitalHV CapitalSystem.One
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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 BrooksinDaniel Saulin
Co-investorsEpisode1Lifeline Ventures
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 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
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
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
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)inEdward Bishop(Founder)in
Co-investorsAccelBalderton CapitalForgePoint CapitalMarch Capital PartnersSozo VenturesTempoCap+4 more
Vena Security provides an AI-powered platform that autonomously investigates, remediates, and validates closure of security exposures across vulnerabilities, misconfigurations, identity risks, and attack surface changes.
AI & Machine LearningCybersecurityEnterprise Software
Xapien is an AI-powered platform that consolidates commercial and open data to deliver risk intelligence for due diligence, serving enterprise compliance teams, financial services, legal, and educational organizations.
AI & Machine LearningEnterprise SoftwareLegalTechSaaSBoston, US
Dan SecretaninShaun O'MahonyinChris Green(CEO)in
Co-investorsDouble DownFounders FactoryFounders Factory NY
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
BeauceronCyberSmartWorldrZamna
Portfolio news
latest coverage across their companiesDig · northernvirginiamag.com · Aug 27, 2026
Hadrian · 3dprintingindustry.com · Aug 19, 2026
Mondoo · rankiteo.com · Jun 3, 2026
Beauceron Security · bitscale.ai · Oct 7, 2025
Silent Push · regtechanalyst.com · Sep 16, 2025
Fenix24 · thecyberwire.com · Apr 30, 2025
Principals & officers · per Companies House
what is this? ⓘDirector · British · since 2018
Neil Christopher Redvers Crocker — right 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, Notion Capital, among 47 tracked co-investors.
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