UK · Pre-Seed–Series B · 3 people tracked
Find your way into Osney Capital
1,450 people in our graph share verified history with the Osney Capital team — schools, employers, funds. One of them is your warm intro.
Investment thesis
Osney Capital focuses solely on the UK cyber security ecosystem, backing founders at the earliest stages of company growth. The firm positions itself as a sector specialist with deep knowledge of the cyber market, buyers, and technology. It invests only where its team believes it can uniquely support a company, contributing networks, expertise, and hands-on guidance. Osney typically makes its first investment when the round size is under £5m, partnering with founders from the very beginning and helping companies scale.
Source: firm website, verified Aug 3, 2026.
Team · 3 people
from the firm's website
What they invest in
from 9 of 16 portfolio companiesCybersecurity ×8AI & Machine Learning ×7SaaS ×5Enterprise Software ×4Developer Tools ×3Cloud Computing ×1Hardware ×1Quantum Computing ×1
HQs:United Kingdom×3United States×1
Investments · 16 tracked
founders shown can be your intro pathThreat-focused vulnerability management with continuous threat modelling and root-cause analysis for developers.
Authorised push payment fraud intelligence platform for detecting mule accounts and payment-related scams.
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
Threat hunting workbench with federated search and guided investigation across security tools.
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)in
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
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)in
Co-investorsMotive ForceOperator CollectiveAntlerPortfolio VenturesRenegade Partners
LLM and SLM tooling platform for supervision and fine-tuning of AI agents with production behavior analysis.
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-investorsSuperSeedFirst Round CapitalY 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-investorsEpisode1IQ Capital
Automated deception technology platform for deploying and maintaining decoys in cloud environments.
Sitehop provides hardware-enforced, FPGA-powered encryption solutions for data in motion, delivering quantum-ready security with ultra-low latency for telecommunications, critical infrastructure, financial services, and enterprise networks.
CybersecurityHardwareQuantum Computing
Melissa Chambers(Founder)in
Co-investorsAmadeus Capital PartnersManta Ray Ventures
AI-native digital forensics and incident response platform with forensic-grade LLM for investigation automation.
The company builds tools for incident response and digital forensics professionals.
AI & Machine LearningCybersecuritySaaS
William Poole(Co-Founder & Chief Executive Officer)in
Portfolio news
latest coverage across their companiesMindgard · eu-startups.com · Aug 13, 2026
Overmind · thefashionlaw.com · Aug 4, 2026
Ploy · techtimes.com · Jul 1, 2026
ESProfiler · osneycapital.com · Mar 25, 2025
Frequently asked questions
- How many investments has Osney Capital made?
- Osney Capital has 15 tracked investments.
- What stage does Osney Capital invest at?
- Osney Capital invests at the Pre-Seed, Seed, Series A, Series B stages.
- What is Osney Capital's typical check size?
- Osney Capital typically writes checks of $6.3M.
- What sectors does Osney Capital focus on?
- Osney Capital focuses on Cybersecurity.
- Where is Osney Capital located?
- Osney Capital is headquartered in UK, GB.
- Who does Osney Capital co-invest with?
- Osney Capital most often shares deals with Amadeus Capital Partners, Episode1, IQ Capital, among 8 tracked co-investors.
Media · Podcasts & interviews
featuring the teamAdam Cragg, Partner at Osney Capital. The Cybersecurity Investor
Between Meetings · Adam Cragg
Images
Co-investors · 12
Antler is a global early-stage venture capital firm that backs founders from the first check through to IPO, operating across roughly 30 locations worldwide.
SOSV is a deep tech venture capital firm that makes first-check pre-seed investments and follow-on rounds in startups focused on human and planetary health, providing lab space and hands-on support at its US locations.
Goodwater Capital is a consumer technology investment firm backing entrepreneurs building companies across sectors such as housing, healthcare, food delivery, financial services, education, entertainment, and transportation.
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AMINO Capital is a global venture capital firm based in Palo Alto that invests around the theme of data moat and network effects, focusing on big data, machine learning, and exceptional products.
Innovation Works is a nonprofit early-stage investor supporting the growth of Southwestern Pennsylvania's tech economy through venture funding, accelerator programs, and ecosystem support.
Riverfront Ventures is an early-stage venture capital fund based in Pittsburgh that invests in early-growth stage technology companies, serving as the venture capital arm of Innovation Works.
Cleo Capital is a generalist venture capital fund founded in 2018 by Sarah Kunst, backing software startups at the earliest stages.
Avalancha Ventures is an early-stage venture investor that backs technology companies, providing initial capital and follow-on funding to help them scale.
Quake Capital is a U.S.-based early-stage venture capital fund with a global presence, offices across the U.S. and in Europe, and an emphasis on hands-on training, leadership development, and startup acceleration.
Innova Memphis is a seed-stage investment firm that funds and mentors early-stage, high-growth companies, currently focused on AgTech and FarmTech ventures with strong intellectual property or competitive advantages.
Startup Capital Ventures is an early-stage venture capital firm with offices in Menlo Park, California and Honolulu, Hawaii, primarily investing in Silicon Valley companies with selective deals in Hawaii and other regions.
Firms observed investing alongside Osney Capital, from public investor directories. Shared companies are the overlap with Osney Capital's recorded portfolio.
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