Top 50 Electrolyzer in Europe

The startup has developed an electromagnetic electrolyzer that efficiently splits water into hydrogen and oxygen, enabling the production of methane from excess renewable energy. This technology provides industries with a safer and more environmentally friendly fuel alternative for applications in transportation, shipping, and mining.

The startup has developed a low-temperature electrolysis technology that converts CO emissions into fossil-free e-fuels and chemicals using renewable electricity. This process provides industries such as aviation and manufacturing with cost-effective, sustainable feedstocks, addressing the need for cleaner alternatives to traditional fossil fuels.

Hystar develops polymer electrolyte membrane electrolyzers for large-scale green hydrogen production, utilizing high-efficiency stacks in a modular design for flexible implementation. This technology addresses the need for sustainable hydrogen solutions to support the transition to renewable energy sources.

Oort Energy manufactures hydrogen electrolyzers that utilize proprietary electrolysis technology to produce green hydrogen from solar energy in an off-grid setup. Their systems significantly lower the cost of green hydrogen production, facilitating its adoption for decarbonizing industrial processes.

The startup has developed a nitrogen electrolyzer technology that generates aqueous ammonia from air and water at ambient conditions, enabling on-site production of both liquid anhydrous ammonia fuel and aqueous ammonium solutions for fertilizers. This platform provides a sustainable and flexible solution for clients seeking decentralized electrochemical ammonia production and fertilizer manufacturing.

<name>REMA</name> <description>REMA develops anion exchange membrane (AEM) electrolyzers that merge alkaline electrolyzer robustness with PEM flexibility to produce green hydrogen at higher temperatures and power densities. Their plug‑and‑play units, ranging from 2.5 kW to 50 kW, are designed for scalable manufacturing using standard injection‑molding processes, reducing capital expenditure and operating costs. By lowering production costs toward $2 per kilogram, REMA aims to make green

Electrogenos develops a unique manufacturing process for green hydrogen electrolysers, significantly reducing production costs and factory deployment times. Their proprietary architecture simplifies the electrolyser stack, enabling fully automated, continuous factory operations. This approach delivers lower stack prices per kilowatt, making sustainable hydrogen energy more accessible across various industrial applications.

Enapter manufactures hydrogen generators using patented Anion Exchange Membrane (AEM) technology, enabling efficient production of green hydrogen from renewable energy sources. Their modular AEM Electrolysers, ranging from 2.4 kW to 100 MW, facilitate scalable hydrogen production while optimizing energy management through an integrated software toolkit.

Dynelectro develops a proprietary solid oxide electrolysis (SOEC) technology that extends the lifespan of electrolyzers by over five times, enabling efficient production of green hydrogen from renewable energy sources. This approach addresses the high costs and intermittent power challenges associated with traditional hydrogen production methods, facilitating a transition to cleaner energy solutions.

Dioxycle develops modular electrolyzer technology that transforms carbon dioxide emissions into sustainable ethylene, a key feedstock for various everyday products. This process enables the recycling of over 800 million tons of CO₂ annually, significantly reducing reliance on fossil fuel-derived ethylene.

The startup produces low-carbon hydrogen through electrolysis powered by renewable energy sources, providing a zero-emission fuel alternative for mobility, construction, and hard-to-electrify industries. This technology enables significant decarbonization efforts, contributing to a sustainable net-zero future.

Battolyser Systems produces a flexible electrolyser with integrated battery capacity that generates 100 green hydrogen by utilizing low-cost renewable energy and instantly switching between hydrogen production and electricity discharge. This technology addresses the challenge of high Levelized Cost of Hydrogen LCOH by enabling hydrogen production only when electricity prices are favorable, while also allowing for revenue generation through electricity trading.

Green Hydrogen Systems specializes in the development of electrolysers that convert renewable electricity into green hydrogen, a clean energy carrier. This technology addresses the need for sustainable energy solutions by providing a method to store and transport energy without carbon emissions.

Exion Hydrogen designs and manufactures advanced water electrolyzers for green hydrogen production. Their technology enables efficient and scalable on-site hydrogen generation, supporting industrial decarbonization and renewable energy integration.

Pioneers non-precious metal catalysts and electrodes for alkaline and anion exchange membrane (AEM) electrolysis, using proprietary nanotechnology to improve efficiency and scalability in green hydrogen production. This approach reduces reliance on critical raw materials, lowers production costs by up to 20%, and supports decarbonization efforts across hard-to-abate industries.

Stargate Hydrogen Solutions provides turn-key alkaline electrolysis systems for the production of green hydrogen using renewable energy sources. Their technology addresses the need for decarbonization in industries such as heavy transport and steelmaking, where traditional electrification methods are insufficient.

Produces green hydrogen using solar-powered electrolysis, converting water into hydrogen without carbon emissions. This technology addresses the need for sustainable and affordable hydrogen production, supporting the transition to a low-carbon energy system.

NovaMea develops electrochemical systems for the low-cost production of green hydrogen from water and electricity. This technology addresses the need for sustainable energy storage and conversion solutions in the transition to a cleaner energy economy.

Everfuel produces green hydrogen by electrolyzing water, enabling a clean energy source for mobility and industrial applications. The company aims to significantly reduce greenhouse gas emissions in hard-to-abate sectors, supplying up to 8 tons of green hydrogen daily to customers across Europe.

Ki Hydrogen operates a biomass‑electrolysis platform that simultaneously produces green hydrogen and biogenic carbon dioxide from lignocellulosic feedstocks such as agricultural and forestry waste. By integrating renewable electricity with abundant biomass, the system delivers hydrogen at approximately $2 per kilogram and CO₂ at $100 per tonne, targeting cost‑effective supply of these building blocks for decarbonising steel, chemicals, aviation fuels, and other heavy‑industry processes. Revenue is generated through the sale of the hydrogen and carbon products to industrial customers seeking low‑carbon inputs.

Clyde Hydrogen Systems develops decoupled electrolysis technology that produces high-pressure green hydrogen by separating the generation of hydrogen and oxygen, allowing for greater flexibility and efficiency. This approach addresses the challenges of existing electrolysers, including high costs, safety risks from gas mixing, and the need for mechanical compression.

Lhyfe produces green hydrogen through water electrolysis powered by renewable energy sources, ensuring zero CO2 emissions during the process. This technology provides a sustainable alternative to fossil fuels for mobility and industrial applications, facilitating the transition to decarbonized energy systems.

Ineratec provides modular Power‑to‑X systems that convert renewable electricity, captured CO₂ and water into synthetic fuels such as e‑gasoline, e‑diesel, e‑kerosene and chemicals like methanol and ammonia. Each plug‑and‑play unit integrates high‑efficiency PEM electrolyzers, CO₂ capture interfaces and catalytic synthesis reactors with real‑time digital‑twin monitoring, enabling scalable, product‑flexible deployment for fuel producers, transport operators and chemical manufacturers. The company delivers turnkey engineering, installation and performance services to replace fossil feedstocks without altering existing distribution infrastructure.

Faraday Energetics develops hydrogen production technologies that utilize electrolysis to convert renewable energy into clean hydrogen fuel. This approach addresses the need for sustainable energy sources by providing a carbon-free alternative for industrial applications and transportation.

Protium Green Solutions develops and operates green hydrogen production and infrastructure to provide zero-emission energy services, supporting organizations in their transition to net zero carbon emissions. By leveraging electrolysis technology, Protium aims to produce 1GW of green hydrogen in the UK by 2030, addressing the growing demand for sustainable energy solutions in various sectors, including aviation and commercial transport.

Parallel Carbon develops integrated technologies for atmospheric carbon removal and clean energy production. The company combines Direct Air Capture (DAC) with water electrolysis, powered by solar and wind energy, to achieve these dual objectives affordably. This approach aims to deliver carbon capture below $100 per ton and clean hydrogen production near $1 per kilogram.

GeoPura utilizes renewable energy sources, such as solar and wind, to produce green hydrogen through water electrolysis, enabling the generation and distribution of zero-emission electricity. This technology provides a sustainable alternative to fossil fuels, facilitating the decarbonization of various industries and helping organizations achieve their net-zero targets.

HY2GEN AG develops and operates plants that produce renewable hydrogen and hydrogen-based e-fuels using water electrolysis and advanced synthesis technologies. The company addresses the need for decarbonization in hard-to-abate sectors by providing zero-emission energy carriers for industry, transport, and power generation.

The startup develops hydrogen panels that generate hydrogen gas by utilizing solar energy to split water molecules, capturing moisture from the air. This technology provides a sustainable energy source at a lower cost, complementing traditional solar panels and addressing the need for clean energy alternatives.

Sora Fuel produces sustainable aviation fuel (SAF) by utilizing a direct air capture system that extracts CO2 from the atmosphere and combines it with water and renewable energy through a liquid bicarbonate electrolyzer. This process creates a carbon-negative fuel supply chain that significantly reduces greenhouse gas emissions associated with air travel while providing an infinitely scalable feedstock solution.

Drift develops mobile maritime infrastructure that harvests renewable energy from ocean wind systems. These net-positive sailing vessels function as self-contained power plants, generating and storing gigawatt-scale green energy. The company delivers this scalable, decentralized power directly to global ports and hard-to-abate sectors.

GravitHy produces low-carbon iron for steelmaking using direct reduction and renewable hydrogen. This process significantly reduces the steel industry's carbon footprint by replacing traditional, emissions-heavy methods.

Naco manufactures coated components for hydrogen production, employing specialized coating techniques to improve the durability and efficiency of these parts. The company provides reliable, ready-to-use components that enable the scaling of hydrogen production processes.

Reverion supplies reversible solid‑oxide fuel‑cell (SOFC/SOEC) modules that can generate electricity from biogas at up to 80 % efficiency, electrolyze power to hydrogen or synthetic methane with up to 75 % round‑trip efficiency, and store energy in the same hardware. The containerized units switch between modes in under a minute, integrate automated market‑price optimisation and CO₂ capture, and are sized from 300 kW to multi‑megawatt for biogas plants, renewable generators and grid operators seeking low‑emission, flexible power and long‑duration storage.

Knox Energy Solutions AS provides hydrogen fueling solutions specifically designed for the maritime sector, utilizing advanced electrolysis methods to produce green hydrogen from renewable energy sources. This technology addresses the maritime industry's need for clean fuel alternatives, significantly reducing carbon emissions and promoting sustainable shipping practices.

This startup manufactures climate technology products that utilize advanced carbon capture and energy efficiency systems to reduce greenhouse gas emissions. By providing measurable solutions, the company enables clients to meet their sustainability targets and contribute to global climate initiatives.

Stegra operates a steel production plant in Boden, Sweden, utilizing green hydrogen to convert iron ore into green iron, thereby producing near-zero emission steel. This process aims to significantly reduce global steel industry CO₂ emissions, addressing the sector's contribution of over 7% to total greenhouse gas emissions.

The startup has developed a sustainable synthesis process for decentralized ammonia production, utilizing only air, water, and green electricity at the point of use. This technology enables large farms and greenhouses to produce ammonia and nitrogen-based fertilizers on-site, reducing reliance on traditional supply chains and enhancing agricultural sustainability.

Produces renewable natural gas (RNG) by combining green hydrogen, generated through electrolysis powered by renewable electricity, with biogenic CO2 in a patented reactor. This process provides a sustainable alternative to fossil fuels for energy-intensive industries, enabling decarbonization while utilizing existing natural gas infrastructure for transport and distribution.

The startup develops green hydrogen and power-to-gas projects that produce renewable synthetic methane from green hydrogen and captured carbon dioxide. This technology enables the decarbonization of the heavy transportation sector by establishing a clean P2X gas production and distribution network in Finland, reducing reliance on fossil fuels.

Rega Energy develops and operates biomethane and green hydrogen plants to provide sustainable energy solutions for high-emission industries such as cement, steel, and textiles. By replacing fossil fuels with renewable alternatives, the company aims to significantly reduce carbon emissions and facilitate the transition to a sustainable economy.

<name>Greenlyte Tech</name> <description>Greenlyte Tech provides a fully electrified, modular platform that converts air, water, and solar energy into high‑purity carbon and hydrogen feedstocks for synthetic fuels. Its LiquidSolar™ system produces renewable natural gas, e‑methanol, and e‑SAF at scale, targeting cost parity with fossil fuels. The technology enables hard‑to‑abate industries to achieve decarbonization and energy resilience.</description

This startup produces green ammonia as a renewable energy source, utilizing a process that captures nitrogen from the air and combines it with hydrogen derived from water electrolysis. By providing a cost-effective alternative to fossil fuels, the company enables industries to reduce their carbon emissions and transition to sustainable energy solutions.

SoHHytec has developed a self-sustainable system that utilizes solar energy to produce renewable hydrogen, oxygen, heat, and electricity on-site, addressing the inefficiencies and environmental impact of traditional hydrogen production methods. Their solution, the Arb, offers a scalable and cost-effective approach to energy independence while minimizing land use.

The startup develops high-power hydrogen fuel cells that utilize electrochemical conversion of hydrogen-containing fuels for sustainable power generation. This technology enables the transportation and power industries to reduce carbon emissions and transition to cleaner energy sources.

H2SITE utilizes palladium-alloy membrane reactors to extract high-purity hydrogen from easily transportable feedstocks like ammonia and methanol, achieving over 99% purity and up to 98% recovery efficiency. The company addresses the challenge of high costs and inefficiencies in long-distance hydrogen transport, enabling small and medium enterprises to access low-carbon hydrogen more affordably.

FRIEM designs and manufactures high-power AC/DC and DC/DC converters for industrial processes and green hydrogen production. They provide modular, efficient power conversion systems and offer revamping services to upgrade existing equipment, ensuring operational continuity and enhanced performance.

This company develops Smart Tank technology for the safe, accessible, and scalable generation and storage of green hydrogen. Their integrated system allows businesses and consumers to produce on-site green hydrogen fuel using only water and renewable electricity. The solution removes complex distribution challenges by enabling point-of-use production and storage while monitoring safety and efficiency via IoT software.

The startup offers a data analysis platform that aggregates energy market big data from various sources to facilitate informed investment decisions in renewable energy production and battery storage. By providing actionable insights, the tool enhances the management of distributed energy resources, enabling businesses to optimize their investment strategies.

H2Vector develops green hydrogen batteries and energy management systems that optimize renewable energy usage for various applications, including industrial machinery and residential energy generation. Their solutions provide zero emissions and enhance energy self-sufficiency, addressing the need for sustainable energy alternatives in a climate-conscious market.