Belgian startup Calyos is developing fully passive, two-phase cooling systems built in Europe, targeting data centres, mobility, and defence—with validation from NATO’s DIANA programme.
Europe’s push for technological sovereignty is reshaping even the most overlooked parts of the stack—including how systems are cooled.
Data centres and compute platforms are essential infrastructure for both the civilian digital economy and modern defence operations. They demand high energy efficiency, robust reliability, and low dependency on local environmental resources such as water or a stable power supply.
Calyos, a Belgian thermal technology company founded in 2012, designs, develops and manufactures fully passive, two-phase cooling systems that can be manufactured entirely in Europe and deployed across mobility, defence, and high-performance computing.
Pour en savoir plus : Cooling becomes strategic – Calyos brings passive thermal tech to Europe’s defence stack
