Osney Capital — Full Portfolio
17 tracked investments · listed companies and verified rows first
aisy builds an attacker-informed view of a customer's environment by connecting findings, assets, code, and engineering activity across a security team's existing tools, then uses that context to prioritize, triage, test, and fix vulnerabilities.
AI & Machine LearningCybersecuritySaaS
Co-investorsFlying Fish Ventures
ESProfiler helps security leaders understand, optimize, and maximize their security technology investments by mapping capabilities across frameworks, identifying gaps and overlaps, and reducing waste.
AI & Machine LearningCybersecurityEnterprise SoftwareSaaSManchester, GB
Louis Holt(CEO & Founder)Louis H(Founder)Joe Pavitt(Chief Product Officer)inJohn McCann(Chief Revenue Officer)in
Co-investorsNauta Capital
Mindgard provides AI security solutions that help enterprises identify, assess, and mitigate threats across AI models, agents, and applications throughout the AI lifecycle.
AI & Machine LearningCybersecurityEnterprise SoftwareBoston, US
Dr. Peter GarraghaninJames Brear(CEO)inAaron Portnoy(Head of Research)inRich Smith(Offensive Security Lead)inNeeraj Suri(Founder)Peter Garraghan(Founder)
Co-investors.406 VenturesAtlantic Bridge VenturesIQ CapitalAlbum VCKarma VenturesLakestar
OnSecurity provides AI red teaming and penetration testing services to identify vulnerabilities in large language models and AI-powered applications.
AI & Machine LearningCybersecurityDeveloper ToolsEnterprise SoftwareSaaS
Conor O'Neill(Chief Executive Officer)Duncan Butchart(Chief Revenue Officer)inAdam Luxford(Chief Operating Officer)in
Co-investorsGresham House Ventures
Ossprey detects supply chain attacks and malicious dependencies by monitoring code behavior at runtime, identifying packages that scan clean but behave maliciously.
AI & Machine LearningCybersecurityDeveloper Tools
Adam Mountain(Founder)in
Co-investorsEpisode1Octopus Ventures
Overmind is a platform that simulates the live production environment to show engineers the blast radius, dependencies, and risks of infrastructure changes before a pull request is merged.
Cloud ComputingDeveloper ToolsSaaS
Dylan Ratcliffe(Founder)inPavel Ronin(Founder)Yul Bahat(Founder)
Co-investorsMotive ForceOperator Collective14Peaks CapitalAntlerKortschak Investments L.P.Portfolio Ventures+1 more
Ploy builds account plans for sales and marketing teams targeting high-intent accounts through coordinated multi-contact email outreach.
AI & Machine LearningEnterprise SoftwareMarketing TechSaaSSan Francisco, US
Bryant Chou(Founder)in
Co-investorsHyphen CapitalStreamlined VenturesY CombinatorFirst Round Capital
Ploy is an identity governance platform that automates joiner-mover-leaver processes, access reviews, permission removal, and audit evidence collection, using an AI agent called Luna.
AI & Machine LearningCybersecuritySaaS
Co-investorsFirst Round CapitalSuperSeedY Combinator
Refute detects and responds to disinformation campaigns on behalf of organizations using quantitative data analysis and threat modeling across multiple channels.
AI & Machine LearningCybersecurityEnterprise Software
Tom Garnett(CEO & Co-Founder)inVlad Galu(CTO & Co-Founder)in
Co-investorsAmadeus Capital PartnersEpisode1Playfair Capital
RevEng.AI builds a verification platform for software supply chain integrity using AI models trained on binary analysis to identify vulnerabilities, malware, and security threats in released software in production.
AI & Machine LearningCybersecurityDeveloper Tools
James Patrick-Evans(CEO and Founder)in
Co-investorsEpisode1In-Q-TelIQ Capital
Sitehop provides encryption technology designed for real-time data protection that prioritizes speed and quantum-readiness.
CybersecurityDeep TechEnterprise SoftwareHardwareQuantum Computing
Melissa Chambers(Co-Founder and CEO)inBen Harper(Co-Founder and CTO)in
Co-investorsAmadeus Capital PartnersManta Ray VenturesNorthern GritstoneMercia Ventures
The company builds tools for incident response and digital forensics professionals.
AI & Machine LearningCybersecuritySaaS
William Poole(Co-Founder & Chief Executive Officer)in
Other
Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.
Aviel TechnologiesHuntbaseSeDataStrand
Rows marked “SEC filing” are inferred from directors named on the company's SEC Form D — public regulatory data, not a portfolio list published by the firm.














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