Louise Boucher

Defense Investor @ Sisyphus Ventures

📍 United Kingdom🔄 Updated September 2026💼 9 investments📅 5 years investing🗓 Last invested Jan 2026
VC🌍 United Kingdom
9
Total investments
5
Early stage
1
Mid stage
1
Late stage
5y
Years active

Portfolio

8 investments · sorted by recency
All investments
Early stage
Mid stage
Late stage
Investor
2026
Stendr is a Norwegian defence technology company building AI-native hardware and software for the modern battlefield. We focus on sovereign European capability, developing systems designed for autonomy, resilience, and real-world deployment.
Investor
2025
Tiberius Aerospace is a modern defense technology company built to empower the UK, US and their global allies with continuously evolving defense systems that provide protection through increased deterrence and accuracy at cost-efficient scale.
Investor
2025
ZeroPhase develops sovereign, software-defined connectivity systems that are resilient and available at scale. Our long-range, high-throughput data links are purpose-built for unmanned platforms and critical operations, ensuring reliable communication even in the most demanding environments. We are a highly experienced, motivated, and ambitious team of engineers and innovators working with intensity and focus. What drives us is simple: to set a new standard in connectivity by combining performance, trust, and scalability - and to lay the foundation for the next generation of interconnected communication systems. Our mission is clear - to make sovereign, software-defined communication systems that are not only state-of-the-art, but also accessible and dependable at scale.
Investor
2025
Onodrim is a technology-driven scale-up platform strengthening Europe’s defence and industrial foundation.
Investor
2024
Harmattan AI is rising as a next-generation defense prime, building the future of autonomous warfare. We leverage AI-driven autonomy, real-time intelligence, and conflict-ready production to deliver attritable systems and autonomous mission management software. Designed for the real-world needs of warfighters, our solutions enable faster deployment, sharper decision-making, and battlefield dominance.
Investor
Apr 2023
We build and distribute best-in-class cash management solutions for SMEs, start-ups and fintechs. Our first products provide seamless access to risk-free rates in EUR, GBP, and USD for everyday cash management, accessible via our web app or through our API. Nous concevons et distribuons les meilleurs produits de gestion de trésorerie pour les PME, start-ups et fintechs. Nos produits sont accessibles via notre application web ou par API et peuvent être proposées en marque blanche.
Investor
Feb 2023
AI-powered command for modern defence. At Comand AI, we deliver the command software modern forces need. AI-native by design. Interoperable with existing systems. Operational. Engineered for warfighting. Comand AIs Prevail analyzes mission and terrain, predicts threats, and delivers real-time courses of action to outpace adversaries, while feeding lessons learned into doctrine and planning. Real-time data overload is turned into an asset, enabling humans to make the right decisions, faster. Built by a team uniting tech veterans from Palantir, Anduril, and OpenAI with deep defense expertise from the military, NATO, and primes, Prevail empowers forces to dominate complex battlefields. In AI-enabled warfare, we build the unfair advantage.
Investor
2021
The world produces a handful of world-class entrepreneurs a year. We are entrepreneurs too, and have designed from scratch the ideal partner for these unique people. A meaningful check at Day One, often even before the company actually exists. A responsive, reliable and knowledgeable counterpart with aligned interests. A long-term relationship we hope will last a decade. We are Frst. -- €200m+ AUM invested at day one in 50+ companies to date. Full portfolio on frst.vc
Experience · 11 entries
All (11)
Investments (9)
Founder (1)
2026
Investor
2026
Stendr is a Norwegian defence technology company building AI-native hardware and software for the modern battlefield. We focus on sovereign European capability, developing systems designed for autonomy, resilience, and real-world deployment.
Founder and Managing Partner
2026
Early-stage fund backing the most ambitious defense founders.
2025
Investor
2025
Tiberius Aerospace is a modern defense technology company built to empower the UK, US and their global allies with continuously evolving defense systems that provide protection through increased deterrence and accuracy at cost-efficient scale.
Investor
2025
ZeroPhase develops sovereign, software-defined connectivity systems that are resilient and available at scale. Our long-range, high-throughput data links are purpose-built for unmanned platforms and critical operations, ensuring reliable communication even in the most demanding environments. We are a highly experienced, motivated, and ambitious team of engineers and innovators working with intensity and focus. What drives us is simple: to set a new standard in connectivity by combining performance, trust, and scalability - and to lay the foundation for the next generation of interconnected communication systems. Our mission is clear - to make sovereign, software-defined communication systems that are not only state-of-the-art, but also accessible and dependable at scale.
Show all 11 entries ↓
Investment activity
2021–2026 · 9 investments
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