This French Startup Just Raised Millions to Fix Satellites Nobody Thought Could Be Saved

Jan de Vries · 2026-08-25

Let's talk about a problem most of us never think about until it's too late. Up there, hundreds of miles above us, a satellite fails. It's out of fuel, or a critical component gives out. For decades, that's meant game over. Billions of dollars in infrastructure just... gone, left to drift as dangerous space junk. But a Paris-based startup called ArcSpace is flipping that script. They've just closed a funding round of over $2.1 million, and their goal is nothing short of revolutionary: fixing satellites that were never meant to be fixed. ### The Investors Betting on Space Resilience The round was led by DEPO Ventures through its DEPO Ventures One fund, with participation from SCE Freiraum Ventures, IRDI Capital Investissement, and a French Business Angels network. It's a clear signal that smart money sees a critical need here. Petr Šíma, Partner at DEPO Ventures, put it perfectly: "Artificial intelligence, defence technologies, and space are where Europe's future champions are being built. ArcSpace offers a breakthrough solution capable of repairing satellites that were never intended to be serviced." He's pointing to something bigger than just tech. It's about resilience. Our societies lean heavily on satellite infrastructure for everything from communications to security. Making that infrastructure repairable changes the whole game. ### How ArcSpace's "Magic Tool" Works Founded in 2022, ArcSpace has developed a compact tool based on proprietary Electron Beam technology. Think of it as a precision welder and cutter built for the vacuum of space. Here's the core idea: - Until now, repairing a satellite in orbit required it to be designed with specific, standardized docking ports and interfaces. Most weren't. - ArcSpace's system doesn't need that. It can be deployed immediately aboard a servicing spacecraft. - It uses a high-energy electron beam to safely cut, join, and weld materials, producing no hazardous waste. Their greatest advantage? Capturing and repairing the vast majority of satellites already up there—the ones never designed for a second life. ### Why This Matters for the Space Economy Guillaume Mohara, CEO and co-founder, frames it as an economic necessity. "The space industry has traditionally operated on a one-time-use model," he says. "When something failed, infrastructure worth hundreds of millions was lost." He believes the ability to manufacture, repair, and modify equipment directly in orbit is the *only* way to build a sustainable and secure space economy. It turns assets from disposable items into maintainable infrastructure. The company's technology has already passed brutal space-environment testing—high-vacuum chambers and intense mechanical vibrations. This new funding will accelerate their in-space validation, aiming for a world-first demo in 2027: over 100 seconds of fully autonomous welding on a spacecraft. ### The Roadmap from Here to the Moon Interest is already strong, with more than a dozen commercial companies and institutional partners like the French space agency (CNES), the European Space Agency (ESA), and the European Defence Fund (EDF) involved. The capital will fuel team growth, flight hardware qualification, and prep for that 2027 demo mission. The product launch is targeted for 2028. ArcSpace's vision starts pragmatically: - Near-term tools for life extension, safe de-orbiting, and dual-use missions by 2028. - Then, they'll scale the same tech to support the in-orbit and lunar assembly of massive structures. - Ultimately, it paves the way for true in-space manufacturing. The European Commission has already flagged In-Orbit Servicing and Operations as a foundational capability. Startups like ArcSpace aren't just building cool gadgets; they're building the toolkit for humanity's permanent, sustainable presence in space. And that's a future worth investing in.