Company Overview
About Submer
Submer is a data center thermal management and immersion cooling company founded in 2015 and headquartered in Barcelona, Spain. The company manufactures single-phase and two-phase immersion cooling systems that submerge servers and computing hardware directly in a dielectric fluid — a thermally conductive, electrically non-conductive liquid — to remove heat far more efficiently than traditional air-cooling or conventional liquid cooling. Submer's flagship products include the SmartPodX (a single-phase immersion cooling system designed for high-density compute deployments) and the MegaPodX (a larger-scale system for hyperscale and colocation data center applications). The company also produces its own proprietary dielectric fluid, SubCool Fluid, engineered to optimize heat transfer performance while meeting environmental and regulatory standards.
Business Model & Competitive Advantage
Submer raised a $55 million Series B in 2023 from investors including Inven Capital and European Investment Bank, with participation from existing investors. This funding round reflected growing interest in immersion cooling solutions driven by the rapid adoption of AI workloads — particularly GPU-dense AI training and inference clusters — that generate far more heat per unit than conventional enterprise server workloads. Air-cooling systems increasingly struggle to handle the thermal density of modern GPU racks (which can exceed 100kW per rack), creating a market opportunity for immersion cooling vendors. Submer has established commercial deployments with hyperscalers, telecommunications companies, and high-performance computing facilities across Europe, North America, and Asia-Pacific.
Competitive Landscape 2025–2026
Submer competes in the immersion cooling segment alongside LiquidStack, GRC (Green Revolution Cooling), Iceotope, and emerging entrants. The broader competitive landscape also includes air-cooling incumbents (Schneider Electric, Vertiv, Rittal) expanding into liquid cooling, and rack-level liquid cooling providers (CoolIT Systems, Asetek) offering an intermediate approach. Submer differentiates through the modularity of its pod-based architecture, its European manufacturing and engineering base, and its proprietary fluid chemistry.
Key Differentiators
Emerging Innovator
Submer is an emerging player bringing innovative solutions to the Cloud & Infrastructure market.
Frequently Asked Questions
Estimated Visibility Trend (Beta)
Simulated 8-week rolling score
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