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Accelsius

Category: AI Infrastructure

A high-performance thermal management company providing proprietary two-phase direct-to-chip liquid cooling systems designed for AI and high-performance computing (HPC) data centers. Accelsius was founded in 2022. The company is led by Josh Claman. Based in Austin, USA. Team size: 51-200. Total funding raised: $89.0M. Latest round: Series B (Jan 2026). Key investors include ["Johnson Controls","Jabil","Innventure","Ascent Capital","Legrand"].

Founded
2022
Headquarters
Austin, USA
Team size
51-200
Total funding
$89.0M

Value proposition

Enables data centers to handle the extreme heat flux of next-generation GPUs while reducing operational expenses (OpEx) by up to 35%, eliminating the need for water-intensive cooling, and significantly increasing rack density.

Products and solutions

["NeuCool Two-Phase Direct-to-Chip Platform","In-rack Coolant Distribution Units (CDUs)","Proprietary Dielectric Heat Sinks","NeuCool Management Software (Real-time thermal monitoring)","Retrofit Liquid Cooling Kits for existing air-cooled infrastructure"]

Unique value

Utilizes 'two-phase' cooling technology where the coolant boils and evaporates at the chip surface, leveraging the latent heat of vaporization to remove heat significantly more efficiently than traditional air or single-phase liquid cooling.

Target customer

Hyperscale data center operators, colocation providers (e.g., Equinix), AI infrastructure developers, and enterprise high-performance computing users.

Industries served

["Artificial Intelligence & Machine Learning","High-Performance Computing (HPC)","Cloud Service Providers","Edge Computing & Telecommunications","Enterprise Data Centers"]

Technology advantage

The system is waterless at the chip level (using non-conductive dielectric fluid), preventing hardware damage risks. Business-wise, the company benefits from a 'Gigawatt-scale' manufacturing and supply chain advantage through its lead investors and partners, Jabil and Johnson Controls.

How they differentiate

Proprietary two-phase 'waterless' direct-to-chip liquid cooling that utilizes dielectric fluid and latent heat of vaporization, significantly reducing the risk of hardware damage compared to water-based systems.

Main competitors

["ZutaCore","CoolIT Systems","Vertiv"]

Key partnerships

["Johnson Controls (Global distribution and HVAC integration)","Jabil (Manufacturing and supply chain scale)","Equinix (Colocation deployment and validation)","Legrand (Data center infrastructure integration)","Innventure (Technology commercialization partner)"]

Notable customers

["Equinix","Johnson Controls","Jabil"]

Major milestones

["Spin-out from Innventure in 2022 to commercialize Nokia Bell Labs thermal technology","Commercial launch of the NeuCool two-phase liquid cooling platform","Secured $24M Series A funding in June 2024","Established global manufacturing and distribution partnerships with Jabil and Johnson Controls","Closed $65M Series B funding in January 2026"]

Growth metrics

Scaling to support next-generation GPU heat fluxes; enables up to 35% reduction in data center OpEx and eliminates water consumption for cooling.

Market positioning

High-performance AI infrastructure specialist providing thermal management for 'Gigawatt-class' AI factories and high-density data centers.

Geographic focus

North America, Europe, and Asia-Pacific

Patents and IP

Built upon a foundational IP portfolio originally developed by Nokia Bell Labs, consisting of multiple patents related to two-phase heat transfer, microfluidics, and thermal interface materials.

About Josh Claman

Josh Claman is a veteran technology executive with over 30 years of experience in the data center and hardware sectors. Prior to Accelsius, he served as CEO of Rimidi, a digital health company, and held the role of Chief Business Officer at Stratasys, a global leader in 3D printing. His foundational experience includes over a decade at Dell Technologies, where he served as Vice President of Global Sales and Operations, managing multi-billion dollar business units across Europe and the Americas.

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