Companies & Startups
We are listing here Manufacturing companies and Startups contributing to the Hydrogen and Alternative fuels value chain in Baltic states. Information is based on publicly available resources and our own experiences and industry insights.
Stargate Hydrogen
Stargate Hydrogen is Estonian based manufacturer which develops and produces green hydrogen solutions, specifically focusing on alkaline electrolyzers with high efficiency and low capital costs. They aim to make green hydrogen affordable for hard-to-abate industries like steel, fertilizers, and chemicals. Their technology utilizes novel ceramic catalysts and patented stack designs. They are an original equipment manufacturer (OEM) of alkaline electrolysers and also offer systems with balance-of-plant components.
Naco Technologies
Naco Technologies develops and applies specialized nano-coatings to significantly improve the durability and efficiency of hydrogen technologies. Their innovative coatings, particularly their proprietary High-speed Magnetron Sputtering (HMS) technology, protect components from corrosion, extend service life, and reduce the need for rare and expensive materials like platinum and iridium. This enables more cost-effective and scalable production of green hydrogen. Naco Technologies is based in Riga, Latvia, and has gained recognition and investment for its contributions to the green energy sector.
Elcogen
Elcogen is an Estonian manufacturer specializing in solid oxide fuel cell (SOFC) and electrolysis cell (SOEC) technology, focusing on affordable green hydrogen and emission-free electricity. Founded in 2001, Elcogen develops and produces core components, including unit cells and stacks, for both SOFCs and SOECs. These components are used in various applications, including residential, industrial, and commercial settings. Elcogen says core technology enables the conversion of fuel sources into emission-free energy and emission-free energy into green hydrogen.
ProtiumTech
ProtiumTech is a company focused on developing and producing innovative, membrane-free, decoupled water acid electrolyzers for green hydrogen production. Their two-step electrolysis process allows for energy management between cycles, potentially lowering production costs and making green hydrogen competitive with grey hydrogen. ProtiumTech aims to accelerate the transition to a zero-carbon energy future by revolutionizing hydrogen production.
PowerUP Energy Technologies
PowerUP Energy Technologies is an Estonian startup specializing in the development and manufacturing of hydrogen fuel cell-based generators and battery capacity extenders. Company focus on providing sustainable, clean energy solutions that replace traditional diesel generators and offer alternatives to batteries and other power sources. PowerUP's products, including the UP series generators, are designed for a variety of applications, from leisure activities to professional use in sectors like construction, healthcare, and security.
SG dujos
https://www.sgdujos.lt/?lang=en
SG dujos, now known as UAB "SG dujos HOLDING", is a Lithuanian company focused on developing alternative fuels, including hydrogen, for transportation. Company has been involved in various projects related to hydrogen, including research on hydrogen as a fuel or fuel additive and the development of infrastructure for hydrogen refueling. SG dujos also participates in projects like the Power-to-gas (P2G) project with Amber Grid and ESO, which aims to integrate green hydrogen production into the gas network.
H2Electro
H2Electro is a Estonian company specializing in the development and manufacturing of high-efficiency Solid Oxide Electrolysis Cells (SOECs) and stacks. These SOECs are designed for the production of green hydrogen through the electrolysis of water, with a focus on high-temperature operation (800-850°C) to optimize efficiency. H2Electro's technology also enables co-electrolysis, allowing for the production of syngas (H2 and CO) from water and carbon dioxide, which can be used in the production of e-fuels and other valuable chemicals.
GaltTec
GaltTec OÜ is an Estonian deep-tech startup focused on developing and marketing microtubular solid oxide fuel cells (mSOFCs). These fuel cells are designed for portable and off-grid energy solutions, particularly for drones, IoT devices, and other mobile applications. The company's technology utilizes a proprietary method for producing zirconia microtubes, enabling high power density and lightweight fuel cells. GaltTec was founded in 2022 and is headquartered in Tartu.
HySol
HySol is an INTRA group company that was established by engineers with more than 20 years of experience in the high-pressure infrastructure and equipment industry. Company's core focus lies in delivering hydrogen refueling solutions for various scales, including simplified refueling panels, container-type mobile refueling solutions and full-scale hydrogen production and refueling stations.
Digas Group
DIGAS (or DiGas) is a Latvian company specializing in decarbonization solutions for the railway industry, specifically focusing on retrofitting diesel locomotives to use cleaner fuels like natural gas and hydrogen. They offer proprietary dual-fuel technologies and integration services to help rail operators transition to more sustainable and cost-effective operations.
Nordic Stream Group OÜ
https://nordicstreamgroup.com/
Nordic Stream Group OÜ is an Estonian-based logistics and energy company primarily focused on decarbonized maritime transport and green energy. Headquartered in Tallinn (Maakri tn 19/1), it operates as a key player in connecting Nordic and Baltic markets. Through its subsidiary OÜ Derivaat NH3, the group is developing an integrated green ammonia project in Paldiski, Estonia. This initiative aims to decarbonize the maritime logistics chain by integrating solar and wind energy.
Spiral Hydrogen OÜ
https://www.spiralhydrogen.com/
Spiral Hydrogen is an Estonian-Dutch deep-tech startup headquartered in Tallinn, Estonia, that is pioneering a revolutionary centrifugal, bubble-free electrolysis technology to produce low-cost green hydrogen. Founded in early 2024 by Juri Volodin and Fedor Stomakhin, the company aims to eliminate the core inefficiencies of conventional systems to bring the levelized cost of green hydrogen below that of fossil fuels.
Conventional electrolyzers lose up to 30% of their input energy because gas bubbles form directly on the electrode surfaces, blocking active reaction sites.
Technology principle:
Mechanical part: Uses a rotating, centrifugal alkaline electrolyzer design.
Bubble Elimination: Centrifugal forces prevent bubble formation on electrode surfaces.
Declared efficiency: Achieves an operational efficiency of over 90% to 95% (HHV).
Form Factor: High energy density allows for a compact, modular build.
Dual-Use Potential: The bubble-free architecture enables water electrolysis in zero-gravity space environments.
The company has quickly scaled from a lab concept to an internationally backed venture:
May 2025: Won the premier Estonian green innovation competition, Prototron, securing early prototype funding.
June 2025: Admitted into the ESA BIC Estonia (European Space Agency Business Incubation Centre) program, receiving a €60,000 deep-tech grant.
September 2025: Joined YES!Delft, a leading tech accelerator in the Netherlands, establishing its dual Estonian-Dutch footprint.
April 2026: Raised €2.7 million in pre-seed funding along with €0.7 million in non-dilutive grants. The equity round was led by Nordic/Baltic venture funds byFounders, Norrsken Evolve, and Superangel.
With its latest influx of capital, Spiral Hydrogen is transitioning from validated lab prototypes to industrial field testing. The company has partnered with SwitcH2 Offshore to deploy a 10 kW pilot system in the Port of Rotterdam