Series C · Hardware & Semiconductors · Barcelona, Spain · Founded 2015 · 51–200 employees
Submer develops immersion cooling technology for data centers, using liquid-cooled systems where entire server racks are submerged in proprietary biodegradable fluid. Founded in 2015, the Barcelona-based company has raised over €50 million in Series C funding led by M&G at a €500 million valuation. Their solution saves 50% of electricity and 85% of physical space compared to traditional air cooling, serving major clients including hyperscalers, Telefónica, ExxonMobil, and CERN. The company is expanding globally with immediate focus on US and APAC markets.