Top 50 Advanced Small Modular Reactor

NuScale Power has developed a small modular reactor (SMR) designed for efficient electrical generation and thermal applications. This technology provides a scalable and reliable energy solution to meet the growing demand for low-carbon power sources.

Isotope Energy develops small modular reactors (SMRs) to provide clean, reliable nuclear electricity. Their technology offers a scalable solution for industrial and grid-scale power generation, aiming to accelerate the transition to a carbon-free energy future.

Blue Capsule Technology develops small modular reactors that produce up to 150 MWth of industrial-grade heat, steam, and electricity, utilizing TRISO fuel in a sodium-cooled system. This technology provides a low-carbon alternative to fossil fuels for industries like ammonia and soda ash production, enabling them to decarbonize while maintaining operational efficiency.

Deep Fission utilizes standardized pressurized water reactor technology in small modular reactors placed one mile underground to leverage natural geological containment and safety features. This approach significantly reduces construction costs and timelines while providing a stable, reliable, and low-cost source of clean nuclear energy.

Aalo manufactures compact nuclear reactors that utilize liquid metal coolant and UZrH fuel to achieve high energy density and simplified safety systems. These reactors can generate electricity at a target cost of 3¢ per kWh, providing a scalable solution for energy needs ranging from small data centers to large cities.

SAINUC develops small modular reactors (SMRs) designed to provide zero-carbon power for data centers and AI computing, addressing the increasing energy demands of these facilities. Their technology ensures 99.99% reliability and can operate independently of the power grid, significantly reducing operational costs and carbon emissions.

Ampera provides factory‑built, thorium‑fueled microreactor modules that generate 15–30 MWe in a sealed, containerized package. The subcritical design uses an integrated neutron driver and TRISO fuel for passive safety and a 30‑year refuel‑free core, while a supercritical CO₂ turbine delivers over 45 % thermal efficiency. The plug‑and‑play units can be shipped and commissioned with minimal site work, supplying zero‑emission, reliable power to data centers, defense sites, maritime platforms, and remote industrial facilities.

The startup manufactures microreactors that generate electricity from radioactive waste and thorium through molten salt reactions with plutonium and uranium. This technology provides a sustainable energy solution, enabling industries to utilize mining by-products while contributing to carbon neutrality goals.

This advanced technology company develops and commercializes portable and stationary microreactor technologies, including the KRONOS MMR and LOKI MMR systems. The company is vertically integrated, also focusing on nuclear fuel fabrication, HALEU transportation, and nuclear applications for space power systems. They provide modular, on-demand clean energy solutions for terrestrial and extraterrestrial needs.

Rolls-Royce SMR designs factory-built small modular reactors (SMRs) that provide a scalable and cost-effective solution for generating clean nuclear energy. This technology addresses the urgent global demand for reliable, low-carbon power sources while minimizing construction risks and timelines.

HEXANA develops sodium-cooled fast reactors for energy production, offering a flexible and efficient alternative to traditional nuclear power. Their reactors are paired with a thermal management system to optimize energy output and safety.

Nuclea Energy provides the Morpheus micro reactor, a factory‑built 3.5 MW lead‑cooled nuclear power module that operates at atmospheric pressure and uses passive safety and natural‑convection cooling. The compact 3 m³ unit delivers a 93 % capacity factor with a five‑year HALEU fuel cycle, enabling rapid, low‑maintenance baseload power for remote communities, mining sites, edge data centers, and military installations.

Apollo Atomics develops compact pressurized water reactors that use commercially available nuclear fuel and proven reactor technology. The reactors are an order of magnitude smaller than conventional plants, enabling standardized, rapid construction and deployment of low‑carbon power. By delivering up to 10 MW per unit at roughly 3 ¢/kWh, the company monetizes through electricity sales and long‑term power purchase agreements, lowering capital and operating costs for utilities and off‑grid customers.

Radiant develops the Kaleidos, a portable nuclear microreactor that generates 1.2 MW of electricity and 1.9 MW of thermal power, providing a clean alternative to diesel generators in remote locations. This technology eliminates the need for on-site water use and nuclear waste, enabling rapid deployment and continuous power supply for critical infrastructure such as hospitals and military installations.

Avalanche Energy develops compact micro-fusion reactors that provide carbon-neutral power for distributed energy and mobility applications. These reactors can be rapidly manufactured and deployed, delivering continuous energy for up to three years, addressing the need for sustainable power in remote locations.

This startup operates a modular small fission plant that converts air and water into synthetic gas and fuels using atomic energy. By providing a method to generate abundant and low-cost energy, the company enables clients to leverage existing infrastructure while reducing dependence on traditional energy sources influenced by climate and political factors.

Develops kilowatt-scale micro-fission reactors using HALEU TRISO fuel and sodium heat pipes to provide autonomous, passively safe, and highly reliable power for mission-critical facilities and space applications. These reactors operate continuously for over three years without a sustaining supply chain, minimizing maintenance and enabling deployment in remote or resource-limited environments.

Last Energy develops micro modular nuclear power plants using a factory-produced, fully modular design to provide reliable baseload power for industrial customers and utilities. Their delivery model minimizes upfront capital costs and land requirements, enabling efficient energy production while addressing the need for decarbonized energy solutions.

General Matter develops and deploys domestic nuclear energy technology to increase national power generation capacity. The company focuses on transforming subsurface nuclear resources into usable energy to reduce foreign reliance. This effort aims to expand energy frontiers through reliable, homegrown power solutions.

Alchemity provides a modular, turn-key reactor system that converts greenhouse gasses and waste resources into valuable chemicals and net-zero fuels. This platform technology offers simplified design and on-site modularity, enabling cost-effective, clean chemical and drop-in fuel production. The system achieves lower lifetime operational costs and significantly reduces CO2 emissions compared to conventional methods.

This company develops lead-cooled small modular reactors (SMRs) for reliable and safe power generation. Their reactor design utilizes enriched uranium oxide fuel to achieve criticality, enabling deployment of nuclear power solutions.

nT-Tao is developing a compact fusion reactor utilizing a Dynamic Stabilized Torus to generate 10-20 MW of electricity, providing a scalable and rapid deployment energy solution. This technology addresses the need for clean, reliable, and independent energy sources for various applications, including industrial facilities and remote locations.

Astral Systems builds compact lattice‑confinement fusion reactors that generate over 1 trillion D‑T fusions per second in a containerized chassis. The reactors provide on‑site production of medical isotopes for hospitals and a high‑flux, tunable neutron source for research labs, with automated safety interlocks and API‑driven data integration.

Blue Energy manufactures and operates modular nuclear power plants, focusing on predictable cost and reliable timelines through centralized fabrication. They de-risk construction via fixed-price contracting, enabling project finance for new nuclear assets. The company sells dispatchable, baseload megawatts to industrial customers through long-term power purchase agreements.

SEATOM Technologies provides comprehensive, zero-emission propulsion solutions for maritime fleets, focusing on integrating Small Modular Reactor (M-SMR™) technology. They manage the entire process, including regulatory assessment, naval architecture, and propulsion system integration, to ensure worry-free, low-cost operations for shipowners. The company delivers tailored decarbonization strategies designed to meet commercial demands while significantly reducing long-term fuel expenses.

Frontier Industries supplies modular, prefabricated AI data‑center pods with integrated liquid cooling that can be shipped and commissioned on‑site within weeks, delivering high‑density GPU/TPU clusters for nuclear and AI compute workloads. It also provides a digital lifecycle operating system that unifies project scheduling, AI simulation orchestration, asset health monitoring, and API‑first telemetry for small modular reactor operators and large‑scale compute providers. The company runs a talent‑development curriculum to certify scientists in nuclear systems modelling and applied AI deployment.

HyET NoCarbon provides modular membrane reactor platforms that integrate direct air capture, electrochemical CO₂ compression, and synthesis pathways for producing synthesis gas, synthetic fuels, and green ammonia. The plug‑and‑play units use protonic‑ceramic and palladium membranes to achieve high‑efficiency CO₂ capture and H₂ separation, with integrated control software for easy retrofitting or standalone deployment. It targets chemical manufacturers, renewable‑energy producers, and fuel‑chain operators seeking scalable, low‑cost CO₂ utilization.

ZoneFlow provides a structured‑catalyst system (ZF Reactor™) that doubles heat‑transfer rates in steam‑methane reformers, enabling 15‑30 % higher hydrogen yields without increasing pressure drop. The complementary ZH₂ Process Technology™ adds a pre‑combustion CO₂ capture loop that removes 95‑97 % of emissions at lower capital and operating cost. Both modules are designed for retrofit into existing SMR units or integration in new plants, allowing operators to boost production and meet decarbonization targets.

Acceleron Fusion is developing muon-catalyzed fusion technology to create small, efficient power plants that operate at significantly lower temperatures than traditional fusion methods. This approach aims to provide a reliable source of clean energy, addressing the urgent need for sustainable solutions to combat climate change and enhance energy security.

Radify Metals provides modular, AI‑controlled plasma reactors that can be installed at ore extraction sites or manufacturing facilities to refine metals, including rare earth elements, on demand. The element‑agnostic system delivers >99.9% purity metal with water‑vapor as the sole by‑product, minimizing logistics and hazardous waste. Revenue is generated through direct metal sales and licensing of the reactor hardware, AI software, and related services.

Q Energy Systems provides a modular, transportable HALEU microreactor platform called ASCENT for reliable, long-duration clean power generation. This deployable nuclear energy system delivers usable power within 24 hours, independent of external logistics or weather conditions. The platform is engineered for rapid terrestrial deployment and autonomous operation on the lunar surface.

NuCube Energy develops and deploys the DeccaCell™, a compact, solid-state fission reactor for decentralized power generation. This technology provides reliable, cost-efficient energy up to 15 megawatts for facilities, decoupling them from traditional grid infrastructure. The reactor utilizes proven materials and offers a core life of up to thirty years, targeting industrial heat and remote power applications.

Commonwealth Fusion is developing smaller, cost-effective tokamak fusion systems using high-temperature superconducting magnets to produce net energy from fusion. The company aims to deliver clean, abundant energy through its SPARC machine, paving the way for the first commercial fusion power plant, ARC, to combat climate change.

Vasuqi provides a plug‑in flow‑through reactor that uses LED‑driven visible‑light oxidation with a nanocatalyst to mineralize residual organic contaminants in wastewater streams. The modular unit operates at low temperature, requires only the solid catalyst as a consumable, and can be retro‑fitted downstream of existing treatment trains to reduce COD and toxic organics, enabling lower discharge fees and water reuse.

MADDE utilizes three-dimensional printing technology to manufacture components for industries such as semiconductors, aerospace, and small modular reactors. This approach reduces production costs and lead times while enhancing design flexibility and efficiency in complex manufacturing processes.

TAE Technologies builds a compact fusion power platform that uses neutral‑beam injection to create stable field‑reversed configuration plasmas, cutting hardware complexity and cost by about half compared to traditional fusion reactors. The system delivers carbon‑free baseload electricity and includes integrated solutions for grid‑scale battery storage, electric‑vehicle charging, and accelerator‑driven Boron Neutron Capture Therapy for precise cancer treatment.

Atom Industries is developing the Long-lasting Integrable Sustainable Energy (L.I.S.E) generator, a portable nuclear energy system that provides 20 MW of process heat at temperatures up to 500 °C, with additional electricity generation capabilities. This technology addresses the need for zero-carbon energy solutions in various sectors, including industrial processes, water desalination, and electric vehicle charging, by offering a modular and easily deployable energy source.

HEXANA offers an integrated energy system combining modular sodium-cooled fast reactors with thermal energy storage. This provides heavy industries with a firm, low-carbon source of high-temperature heat and dispatchable power, enabling decarbonization of hard-to-abate sectors.

Maritime Fusion develops compact fusion reactors designed for marine propulsion and off‑grid power applications, targeting commercial vessels, defense platforms, and remote island energy systems. The reactors aim to replace fossil fuels by providing zero‑emission, high‑energy output within a 6,000‑7,000 m³ footprint, enabling longer range and increased cargo capacity without bunker fuel. Revenue is projected from capital sales of reactors and associated power‑conversion equipment, with a roadmap toward first deployment by 2032 and cost reductions through mass production of high‑temperature superconducting magnets.

Tokamak Energy builds compact spherical tokamaks that use high‑temperature superconducting magnets to generate strong magnetic fields for plasma confinement, achieving fusion‑relevant temperatures in a smaller, lower‑cost device. Their modular approach and reduced cryogenic requirements aim to provide scalable, clean power solutions for utilities, governments, and industrial partners.

Zap Energy is developing compact fusion power technology that eliminates the need for magnets or lasers, utilizing a novel approach to achieve nuclear fusion. This innovation aims to provide a cleaner and more efficient energy source, addressing the challenges of traditional fusion methods and their associated costs.

Realta Fusion develops compact, scalable, and modular fusion energy systems based on magnetic mirror technology. These CoSMo fusion™ systems are designed to provide zero-carbon, cost-effective energy solutions for industrial heat and power applications. The modular design allows for faster implementation and scalability to meet diverse energy demands.

GenF develops commercial inertial confinement fusion reactors that produce carbon‑free baseload electricity by using high‑energy laser pulses to compress deuterium‑tritium fuel capsules. The modular design delivers up to 100 MW per unit, integrates with existing grid infrastructure, and includes real‑time plasma diagnostics and cloud‑based analytics for predictive maintenance and regulatory reporting. Utilities can adopt the technology through a licensing model to add scalable, low‑emission power capacity.

Deutelio offers the Polomac system, a hybrid magnetic-field confinement architecture that combines toroidal and helical fields with AI‑driven real‑time diagnostics to increase plasma stability and energy gain in compact fusion reactors. The modular coil and vacuum‑vessel design can be retrofitted into existing tokamak or stellarator testbeds, enabling faster, lower‑cost development of net‑positive fusion power for laboratories, venture firms, and utility developers.

Standard Nuclear produces high-assay low-enriched uranium (HALEU) and other advanced nuclear fuel materials at an industrial scale. The company's proprietary manufacturing processes enable the reliable and scalable supply of fuel essential for next-generation reactors in energy, defense, and space applications.

MicroNuclearTech develops the MsNB, a novel advanced nuclear power system utilizing molten salt technology. This system is engineered to deliver clean, safe, and reliable energy generation. The company focuses on cost-effective design refinement while a partner entity handles commercialization, construction, and maintenance.

SEATOM Technologies provides comprehensive, zero-emission propulsion solutions for maritime fleets, focusing on integrating advanced M-SMR™ nuclear power systems. They manage the regulatory assessment, naval architecture, and technical integration necessary for decarbonization. This service allows shipowners to operate cost-effectively while meeting environmental demands without managing the complexities of the new propulsion technology.

Jimmy designs and operates thermal generators powered by nuclear micro-reactors to provide carbon-free industrial heat at a lower cost than fossil fuels. This technology enables industrial clients to utilize decarbonized heat for their processes without significant modifications to their existing systems.

Newcleo develops lead-cooled fast reactors and MOX fuel manufacturing to generate safe and sustainable nuclear energy while closing the fuel cycle. The company addresses the urgent need for low-carbon energy solutions to combat climate change and facilitate global decarbonization efforts.

Applied Atomics designs, builds, deploys, and operates co-located nuclear power plants for large industrial consumers requiring 100 MWe to 1,000 MWe. The company utilizes proven light water reactor architectures to deliver affordable, always-on, carbon-free power to energy-intensive sectors like steel and desalination. By managing the entire power plant development, they ensure faster market deployment and reliable energy supply for industrial scale power needs.