Accelsius develops and sells NeuCool two-phase liquid-cooling systems, including rack-level integrated systems and row-based coolant distribution units for high-density data centers and AI infrastructure.
Accelsius builds two-phase direct-to-chip liquid cooling, using non-conductive dielectric fluid in a closed loop rather than treated water, which removes leak, corrosion and water-quality exposure from the rack. The product line now spans evaluation through deployment: the Thermal Simulation Rack as a test platform, the MR250 row-based CDU at 250 kW per rack in one-by-250 kW or two-by-125 kW configurations, generally available 2025-10-13, and the IR150 announced 2026-04-20, an integrated 800 mm enclosure combining a two-phase CDU, 42U of IT rack space and built-in liquid and vapour manifolds at up to 150 kW, explicitly designed to move through standard IT distribution channels rather than bespoke construction. The strongest evidence is third-party: independent analysis by Jacobs Engineering is cited for 35 to 44 percent annual OpEx savings and 8 to 17 percent TCO savings versus single-phase direct-to-chip. The Series B closed 2026-01-12 at USD 65 million led by Johnson Controls with Legrand joining, which puts two large electrical and building-systems incumbents on the cap table and gives channel reach the company could not build alone. Deployment scores 2 because select MR250 deployments began late in the third quarter of 2025 with no operator named or unit count disclosed.
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Accelsius develops and sells NeuCool two-phase liquid-cooling systems, including rack-level integrated systems and row-based coolant distribution units for high-density data centers and AI infrastructure. Accelsius builds two-phase direct-to-chip liquid cooling, using non-conductive dielectric fluid in a closed loop rather than treated water, which removes leak, corrosion and water-quality exposure from the rack. The product line now spans evaluation through deployment: the Thermal Simulation Rack as a test platform, the MR250 row-based CDU at 250 kW per rack in one-by-250 kW or two-by-125 kW confi
Accelsius is on the AI Core watchlist list of Frontier Tech Intelligence with a score of 58 out of 100, below the Top 100.
Accelsius is based in Austin, Texas, United States.
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