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Finnish deeptech company Kelluu has raised €15 million in a Series A round led by the NATO Innovation Fund, marking the fund’s first investment in a Finnish firm.
Other participants included Keen Venture Partners, Swedish defence VC Gungnir Capital and state-owned investor Tesi.
Kelluu operates an autonomous fleet of hydrogen-powered airships designed for persistent intelligence, surveillance and reconnaissance (ISR), with five vehicles from a single base able to monitor roughly 30,000 square kilometres.
The airships have logged over 50,000 kilometres, flown 12-hour Arctic missions, and operate in temperatures down to -33°C and under GNSS jamming.
Kelluu has completed two phases of NATO’s DIANA programme and demonstrated real-time integration with allied systems during Exercise Steadfast Dart 26 and other NATO trials.
The platform carries multi-sensor payloads (LiDAR, thermal, multispectral), stitches georeferenced data into near-real-time digital twins, and targets both defence and civilian markets including forestry, meteorology and infrastructure monitoring.
Proceeds will be used to optimise technology, scale the fleet and advance Kelluu AI Labs, an initiative to build geospatial foundation models from flight data.






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