NuCube Energy

What NuCube Energy does

NuCube Energy is a development-stage nuclear technology company designing solid-state fission microreactors intended to deliver both electricity and high-temperature industrial heat. Its flagship product, the DeccaCell™ reactor, is a factory-built TRISO-fueled, heat-pipe-cooled solid-state fission unit rated at up to 15 MW with a 7–30 year core life, operating at temperatures up to 1,100°C and transportable by conventional road freight. A dedicated sub-brand, NuSun™, packages the DeccaCell for hyperscale data center deployments and integrates with Energy Vault's VaultOS and B-VAULT battery storage for 24/7 carbon-free power. Revenue is expected to be generated via hardware sales of factory-built reactor units, replacement and refueling services, and long-term power and industrial heat offtake agreements, with first-of-a-kind deployment targeted for 2029.

The company serves three primary end-markets: hyperscale and AI data center operators seeking behind-the-meter baseload power, energy-intensive industrial facilities seeking to displace natural gas for high-temperature process heat, and remote microgrid operators (mining, military, research bases) that lack reliable grid access. Its go-to-market is direct enterprise sales targeting engineering, procurement, and construction teams at industrial and hyperscale sites, augmented by channel partners including Energy Vault, Halliburton Labs, and Shell GameChanger, and supported by federal program selections (DOE Nuclear Energy Launch Pad, GAIN vouchers with Argonne and Idaho National Laboratory, Idaho State University test reactor site).

NuCube was co-founded in 2023 by Bill Gross (Idealab Studio, also founder of Energy Vault and Heliogen) and Dr. Cristian Rabiti (ex-USNC, Idaho National Laboratory, Argonne National Laboratory) and is headquartered in Idaho Falls, Idaho near Idaho National Laboratory, with additional offices in Pasadena and Phoenix. The company has raised $13M in private funding led by Arizona Nuclear Ventures and is pursuing a public listing via a SPAC business combination with Launch Two Acquisition Corp. (NASDAQ: LPBB) at an approximately $500M pre-money equity valuation.

Name

NuCube Energy

Legal name

NuCube Energy, Inc.

Website

https://nucube.energy

Company type

Private

Founded year

2023

Operating status

Operating

Headcount range

1–10 employees

Short description

NuCube Energy is a development-stage nuclear technology company building factory-built solid-state fission microreactors (DeccaCell™ and NuSun™) that deliver up to 15 MW of electricity and 1,100°C industrial heat for hyperscale data centers, industrial facilities, and remote microgrids.

Ownership category

akta.pro rank

Product category

Advanced Nuclear Reactors

NAICS

Nuclear Electric Power Generation (221113)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Microreactor Power Generation (EUACADAG)

akta.pro secondary industry

Gen IV / Advanced Reactor Systems (SFR, LFR, GFR, MSR, HTGR, Microreactors) (EUAKADAC)

Keywords

• Modular nuclear reactors
• Solid-state fission
• High-temperature microreactors
• Advanced nuclear energy
• Factory-built reactors

Headquarters

HQ city

Idaho Falls

HQ country

United States

HQ region

North America

Offices3 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Supply Chain, Operations, Infrastructure

Revenue model

1. Microreactor Unit Sales / Deployment: NuCube manufactures and deploys factory-built modular microreactors (DeccaCell and NuSun platforms) to industrial, data center, and remote microgrid customers. Units are delivered via road or rail and rapidly installed on site. Once fuel is depleted, the unit is replaced and removed or refueled. Revenue is generated through initial unit deployment, replacement, and refueling services.
2. Industrial Heat Services: The only reactor designed to produce heat up to 1,100°C for industrial processes, competing with natural gas for high-temperature industrial customers. Revenue is generated through the provision of both electricity and process heat to industrial facilities.
3. Data Center Power Agreements: NuCube's NuSun platform targets data center power markets with flexible baseload generation. Strategic partnerships with Energy Vault integrate the NuSun platform with battery energy storage for 24/7 uninterrupted power for AI data centers. Revenue from long-term power offtake agreements with hyperscale data center operators.
4. Clean Hydrogen Integration: Integration of NuCube's NuSun microreactor with NewHydrogen's ThermoLoop technology for thermochemical hydrogen production using high-temperature heat (up to 1,100°C) to split water into hydrogen, enabling low-cost zero-carbon hydrogen at industrial scale.

Go-to-market motion2 records

Distribution channels3 records

Marketing channels6 records

Core offering

NuCube Energy designs and manufactures factory-built solid-state fission microreactors, anchored by the DeccaCell platform that delivers up to 15 MW of electricity for 7 to 30 years without refueling and can produce industrial heat up to 1,100 degrees Celsius. The company also offers the NuSun sub-brand, a deployment of the same core technology specifically configured for hyperscale data center power, including integration with battery storage. Both products are intended for industrial campuses, remote microgrids, and AI data center customers.

Product overview

NuCube Energy develops factory-built solid-state fission microreactors for both electricity and high-temperature industrial heat. The product portfolio consists of two main offerings: the core NuCube DeccaCell™ reactor (delivering up to 15 MW power for 7-30 years with core life up to 30 years, operating at temperatures up to 1,100°C using TRISO fuel and heat pipe cooling), and the NuSun™ sub-brand variant designed specifically for data center applications and integrated with energy storage solutions. The DeccaCell serves as the foundational platform while NuSun targets the hyperscale data center market. The technology replaces natural gas for industrial customers and provides cost-competitive electricity in remote areas.

Differentiator

Problem solved

Functional benefit

Brands

• NuSun: A dedicated deployment of NuCube technology to meet large energy use sites such as data centers. The NuSun platform is a compact solid-state fission reactor capable of producing heat up to 1,100 degrees Celsius for data center power and industrial applications.
• NuCube DeccaCell

Products and services

• NuCube DeccaCell Solid-State Fission Reactor The world's first solid-state fission reactor, compact enough to be transported via conventional road freight, providing facilities with up to 15 MW of power for 7 to 30 years before refueling. Uses TRISO fuel and heat pipe cooling with dramatically fewer moving parts, operating up to 1,100 degrees Celsius for both electricity and industrial process heat. Targeted at industrial facilities, remote microgrids, and energy-intensive sites.
• NuSun Microreactor Platform A dedicated deployment of NuCube's solid-state fission technology for large energy-use sites such as data centers. Combines TRISO fuel and heat pipes with a proprietary heat-to-electricity conversion system, fully enclosed in a stainless-steel containment vessel readily transportable via road. Designed to integrate with Energy Vault's VaultOS Energy Management System and B-VAULT Battery Energy Storage for 24/7 uninterrupted power for AI data centers.
• Clean Hydrogen Production via ThermoLoop Integration Integration of the NuSun microreactor with NewHydrogen's ThermoLoop technology for thermochemical hydrogen production, using high-temperature nuclear heat to split water into hydrogen. Provides industrial customers with low-cost zero-carbon hydrogen at scale.

Quantifiable outcome

• Operating temperature up to 1,100°C — the only nuclear technology capable of competing with natural gas for industrial heat
• +3 more outcomes

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Eleven partnerships are on record, tiered core and minor.

• NewHydrogencoreStrategic or Co-development Partner · 6 May 2026Strategic collaboration to explore integrating NewHydrogen's ThermoLoop process (which splits water into hydrogen using high-temperature heat) with NuCube's NuSun microreactor platform. The partnership evaluates integration pathways for nuclear-driven clean hydrogen production at scale using heat up to 1,100°C, unlocking low-cost zero-carbon hydrogen at industrial scale.
• Idaho State UniversitycoreStrategic or Co-development Partner · 27 April 2026Idaho State University and NuCube were jointly selected for the DOE Nuclear Energy Launch Pad USA program. The Advanced Research and Test (ART) Reactor project will be deployed on ISU's campus, based on NuCube's commercial 4 MWth microreactor using TRISO fuel and heat pipe cooling technology. The reactor will serve as a platform for training, research, and technology development.
• Argonne National LaboratorycoreTechnology or Integration · 14 April 2026NuCube was awarded a FY2026 GAIN voucher to work with Argonne National Laboratory on validating the remote operations model for its DeccaCell microreactor using a digital twin in simulated environments. This project supports the autonomous control architecture verification for the reactor design.
• Halliburton LabscoreStrategic or Co-development Partner · 18 December 2025NuCube was selected to join Halliburton Labs, a collaborative accelerator environment supporting the advancement of cleaner, more affordable energy. Halliburton Labs invested in NuCube and provides access to world-class facilities, global business network, and commercialization expertise. Focus areas include supply chain, remote operations, and modularization of reactor design. The program culminated in a Finalists Pitch Day in Denver in March 2025.
• Shell GameChangercoreStrategic or Co-development Partner · 15 June 2025NuCube was selected for Shell GameChanger, a program backing early-stage innovations with potential to reshape the energy landscape. Shell provides strategic support, expertise, and grant funding to accelerate NuCube's microreactor development and deployment. The collaboration aims to align nuclear power with industrial heat and power needs for decarbonization.
• Utah San Rafael Energy Lab (USREL)coreStrategic or Co-development Partner · 10 June 2025MOU signed between USREL (a unit of Utah Office of Energy Development) and NuCube for siting one of NuCube's microreactors at USREL in Orangeville, Utah. The MOU establishes collaboration for testing NuCube's microreactor with a supercritical carbon dioxide power cycle. This is a key step in bringing NuCube's modular reactors to market.
• Energy VaultcoreStrategic or Co-development Partner · 15 January 2025Strategic partnership to integrate NuCube's NuSun microreactor platform with Energy Vault's VaultOS Energy Management System and B-VAULT Battery Energy Storage System for data center deployments. Joint technical development focuses on integration of NuSun with energy storage for 24/7 uninterrupted power. Energy Vault leverages advanced material science for shielding and containment systems. Target deployment by end of 2028/beginning 2029 for the U.S. data center market estimated at 500 TWh in 2028.
• Idaho National LaboratorycoreTechnology or Integration · 19 December 2024NuCube received a GAIN voucher to collaborate with Idaho National Laboratory on assessing and optimizing the performance of a heat exchanger conceptual design for converting carbon dioxide gas into solid carbon materials. This project supports NuCube's industrial applications and carbon utilization research.
• GeniumminorStrategic or Co-development PartnerPartnership listed on NuCube's website under Partnerships & Alliances. Genium is integrating systems and sharing information with NuCube for potential technology collaboration.
• Solid Carbon ProductsminorStrategic or Co-development PartnerTechnology share agreement listed on NuCube's website under Partnerships & Alliances. Partnership focuses on technology sharing related to carbon products and applications.
• Seerstone DevelopmentminorStrategic or Co-development PartnerPartnership listed on NuCube's website under Partnerships & Alliances. Developing joint integrated systems with Seerstone Development.

Scale indicators9 records

Recent moves8 records

Expansion highlights7 records

Direct peers

• Last Energy: Developer of a small modular reactor designed for factory manufacturing and rapid deployment to industrial and data center customers; comparable as a private, US-headquartered advanced reactor developer pursuing similar B2B GTM motion.
• Oklo: Advanced fission company developing compact fast reactors and microreactors for data centers, defense, and industrial customers; directly comparable as a US-based advanced reactor developer pursuing hyperscale data center offtakes.
• X-energy: Developer of the Xe-100 high-temperature gas-cooled reactor and TRISO-based fuel; comparable through shared TRISO fuel architecture, high-temperature process heat applications, and DOE-backed advanced reactor program participation.
• Radiant Industries: Developer of a portable microreactor for off-grid and data center power; one of the four DOE Nuclear Energy Launch Pad selectees alongside NuCube, and the most directly comparable microreactor competitor targeting similar use cases and customer segments.
• Ultra Safe Nuclear Corporation (USNC): Pioneer in TRISO-based fully ceramic microencapsulated fuel and the Micro Modular Reactor (MMR); directly comparable on TRISO fuel architecture, microreactor design, and historical employer of multiple NuCube senior technical staff.

Emerging players

• Deep Fission: Early-stage developer of a deep-borehole microreactor concept; comparable as an emerging advanced reactor startup addressing siting flexibility and low-cost nuclear power for industrial applications.
• General Matter: Selected alongside NuCube as one of the four DOE Nuclear Energy Launch Pad program participants; comparable as an emerging advanced reactor developer receiving the same federal regulatory and infrastructure support.
• Aalo Atomics: Early-stage microreactor company emerging from the DOE national lab ecosystem targeting data center power; comparable as an emerging advanced reactor startup in the same microreactor category.

Broad incumbents

• Westinghouse Electric Company: Established nuclear OEM with a broad portfolio including the eVinci microreactor concept; comparable as a broad incumbent extending into the same microreactor category with deeper capital, supply chain, and licensing experience.
• Holtec International: Nuclear technology and equipment company developing the SMR-160 small modular reactor; comparable as a broad incumbent offering an alternative SMR/microreactor option for industrial and utility customers with substantially greater resources.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/nucube-energy

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds4 records

Investors5 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about NuCube Energy