European deeptech startups saw notable investment momentum in the first half of 2025, with several companies securing substantial funding to push next-generation technologies toward commercial success. These deals reflect growing investor confidence in sectors ranging from clean energy and advanced materials to quantum computing and medical hardware.
Leading the pack was German fusion energy pioneer Marvel Fusion, which raised €50 million in March. The company aims to accelerate development of compact fusion systems that could one day provide safe, scalable, and low-carbon power. This funding extension builds on its existing Series B round and underlines strong backing for ambitious clean energy innovation in Europe.
Spain’s H2SITE followed with a €36 million round. The startup focuses on hydrogen purification technologies designed to make green hydrogen more economical and scalable. Its proprietary membrane reactor and separator systems aim to improve hydrogen production and distribution, a critical step for broader adoption of clean fuels.
In the UK, Intelligent Energy secured £17 million in government-backed funding to expand its hydrogen fuel cell power systems. These zero-emission fuel cells target a range of applications, from automotive and aerospace to telecommunications and material handling, highlighting Europe’s push toward sustainable power sources.
Materials innovation also drew investor interest. Keey Aerogel raised €18 million to scale production of sustainable silica aerogel insulation, turning construction waste into high-performance material. Aerogels are lightweight and thermally efficient, giving them potential across construction, energy, and industrial markets.
Finland’s SemiQon garnered €17.5 million to develop silicon-based quantum processors. By using established semiconductor processes, the company is working to make quantum computing hardware more scalable and cost-effective. Advancing cryogenic CMOS technologies could support the broader build-out of quantum systems in future.
France’s Chipiron made waves with a $17 million Series A round to commercialize a portable, ultra-low-field MRI system. Its compact medical imaging technology aims to reduce costs and infrastructure needs for MRI diagnostics, potentially expanding access to essential health screening tools.
Away from energy and health, Denmark’s ATLANT 3D secured $15 million for atomic-scale fabrication technologies. Its Direct Atomic Layer Processing platform can precisely deposit and pattern materials for microelectronics, optics, and sensors, a key capability for advanced manufacturing and space applications.
Smaller but ambitious rounds rounded out the list of key deeptech deals. The Netherlands’ Lidrotec raised $13.5 million for laser-based high-precision wafer processing equipment. FononTech, also in the Netherlands, attracted €8.5 million to advance additive manufacturing for microelectronic structures. Belgian startup Axiles Bionics closed €6 million of its planned €8 million Series A round to bring next-gen intelligent prosthetics to global markets.
These investments reflect a broader trend of capital flowing into European deeptech, even as global venture activity cycles through ups and downs. Industries such as clean energy, advanced materials, quantum computing, and health tech continue to draw strategic funding, often supported by public funds or government incentives aimed at boosting competitiveness.
Importantly, these deals show that Europe’s innovation ecosystem is maturing. Investors are backing companies with clear paths to industrial application, not just early-stage concepts. This shift bodes well for the continent’s ability to compete on the global stage in sectors where foundational science meets real-world impact.
As 2025 progresses, analysts expect more deeptech funding, particularly in areas tied to climate goals, mobility, and next-generation computing. For startups that secured capital in H1, the path ahead involves converting investment into scalable products and forging partnerships that can bring breakthrough technologies to market.
