Calyos
Designs, develops, and manufactures fully passive, two-phase cooling systems.
About
Calyos is a Belgian thermal technology company founded in 2012, specializing in the design, development, and manufacturing of fully passive, two-phase cooling systems. These systems are designed for high energy efficiency, robust reliability, and low dependency on local environmental resources, making them suitable for demanding applications in mobility, defense, and high-performance computing. The technology, born from space engineering, leverages the phase change of a fluid to transfer heat without pumps or moving parts, offering a silent, efficient, and highly reliable cooling solution.
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Key facts
- Headquarters
- Liège, Wallonia, Belgium
- Founded
- 2012
- Business model
- B2B
Frequently asked
What does Calyos do?
Calyos aims to strengthen supply chain resilience and support technological sovereignty by manufacturing its systems entirely within Europe, primarily using metal components.
Public record
SEC filings, insider activity, nonprofit links and pay benchmarks for Calyos

