What Stargate Hydrogen does

Stargate Hydrogen Solutions OÜ, founded in 2021 in Tallinn, Estonia, develops alkaline electrolyser stacks and containerised systems for industrial-scale green hydrogen production. Its core technology is a patented ceramic-based catalyst that replaces precious metals (iridium, ruthenium) used in incumbent designs, combined with a stack and plant-control architecture the company treats as a "battery system" development problem. The portfolio spans the 0.5 MW Stellar Edge stack, the 5 MW Starbase stack, the 1 MW Gateway containerised system (200 Nm³/h at 30 bar), and the 10 MW Aurora containerised system, the last claiming the lowest m²/MW footprint in the market at 14.4 m²/MW. Technology has been independently validated by Fraunhofer IFAM, ZSW Stuttgart, and VTT.

The company sells capital equipment directly to heavy-industry and utility customers (refineries, steel, ammonia, fertilisers, e-fuels) and stacks to engineering system integrators (Rockfin, BGR Tech, BIGA), with strategic channel partnerships used for market entry into the UK (Seacht Group), the Nordics (OX2, VTT), and the Middle East (RDI Saudi Arabia). All products are quote-based industrial equipment with 12-month lead times for systems and 6-month for stacks, supplemented by engineering, FEED, and integration services. Manufacturing is anchored at a 140 MW/year Tallinn factory inaugurated in June 2025, scalable to over 1 GW. As of late 2025, the company has raised roughly €53M in disclosed equity and grants, plus a €10.7M European Commission grant, with backers including UG Investments, SmartCap, and Repsol Corporate Venture.

Name

Stargate Hydrogen

Legal name

Stargate Hydrogen Solutions OÜ

Website

https://stargatehydrogen.com

Company type

Private

Founded year

2021

Operating status

Operating

Headcount range

51–100 employees

Short description

Stargate Hydrogen is an Estonian alkaline electrolyser manufacturer selling ceramic-based, precious-metal-free stacks and containerised systems (0.5 MW to 10 MW) to heavy-industry buyers, utilities, and engineering system integrators across Europe, the Middle East, and Asia.

Ownership category

akta.pro rank

Product category

Industrial Electrolyser Equipment

akta.pro primary industry

Hydrogen Energy Storage & Power-to-X Equipment (electrolyzers, storage, fuel cell systems) (IMAGAHAM)

Keywords

• Alkaline electrolyser systems
• Green hydrogen production
• Industrial hydrogen equipment
• Electrolysis stack manufacturing
• Renewable hydrogen technology

Headquarters

HQ city

Tallinn

HQ country

Estonia

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Alkaline Electrolyser Hardware Sales: Sale of alkaline electrolyser stacks (0.5 MW Stellar Edge, 5 MW Starbase) and complete containerised electrolyser systems (1 MW Gateway, 10 MW Aurora) to industrial customers, utilities, and system integrators. Equipment sales with 12-month lead time for systems, 6-month lead time for stacks. Industry-leading performance guarantee offered.
2. Engineering and Integration Services: Engineering support, full integration support, pre-FEED and FEED activities, maintenance training, and balance-of-plant services provided to system integrators and customers. Completes the hardware offering with deployment and integration expertise.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels7 records

Core offering

Stargate Hydrogen designs, manufactures, and sells alkaline electrolyser stacks (Stellar Edge 0.5 MW, Starbase 5 MW) and containerised turn-key hydrogen production systems (Gateway 1 MW, Aurora 10 MW) using a proprietary ceramic-based catalyst that eliminates precious metals. Its products are sold to industrial customers, utilities, renewable energy project developers, and system integrators across Europe, the Middle East, and Asia, supported by engineering, integration, and balance-of-plant services.

Product overview

Stargate Hydrogen is a European electrolyser technology company offering a portfolio of alkaline electrolyser products ranging from stacks (Stellar Edge 0.5 MW, Starbase 5 MW) for system integrators to complete containerised electrolyser systems (Gateway 1 MW, Aurora 10 MW) for project developers and heavy industries. All products use proprietary ceramic-based catalyst technology that is free of precious metals (iridium, ruthenium), achieving high current densities and high efficiencies. The technology is validated by Fraunhofer Institute and ZSW Stuttgart. The company targets decarbonisation of hard-to-abate sectors including steelmaking, fertilizers, chemicals, and oil refineries.

Differentiator

Problem solved

Functional benefit

Brands

• Stellar Edge: 0.5 MW alkaline electrolyser stack designed for system integrators, operating at 32 bar with flow rates from 20 to 100 Nm³/h
• Starbase
• Gateway
• Aurora

Products and services

• Aurora 10 MW Electrolyser System A 10 MW containerised large-scale alkaline hydrogen production system designed for heavy industries such as steelmaking, fertilisers, and chemicals. Offers the lowest m²/MW ratio in the market (17.8 m²/MW footprint, improved to 14.4 m²/MW), outdoor-ready with no buildings required, dynamic operation for renewables, CE certified, and free of precious metals.
• Gateway 1 MW Electrolyser System A 1 MW containerised turn-key alkaline hydrogen production system for project developers. Produces 200 Nm³/h of hydrogen pressurised to 30 bar output, outdoor solution with proven track record of long operational lifespans, technology validated by Fraunhofer. Suitable for chemical feedstock, process heat, blending, transport fuel, and energy storage applications.
• Starbase 5 MW Electrolyser Stack A 5 MW pressurised alkaline electrolyser stack for system integrators, operating at 16 barg. Skid-mounted modular units with optional balance-of-stack supply, designed and made in Europe with complete documentation and full integration support. Ideal for engineering companies building large-scale systems.
• Stellar Edge 0.5 MW Electrolyser Stack A 0.5 MW next-generation alkaline electrolyser stack for system integrators, delivering 20-100 Nm³/h. Operates at 32 bar with patent-pending design. Available with 6-month lead time and performance guarantee. Validated by Fraunhofer and tested by ZSW Stuttgart.

Quantifiable outcome

• Green hydrogen cost target of €1/kg
• +4 more outcomes

Named customers7 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature8 records

Partnerships

15 partnerships are on record, tiered core, major and minor.

• Seacht GroupcoreStrategic or Co-development Partner · 5 March 2026UK-based energy and engineering group partnership for joint pursuit of green hydrogen projects across the UK market. First UK commercial partnership for Stargate, announced publicly ahead of Hydrogen UK Annual Conference & Awards in Birmingham. Represents first entry into the UK market as part of broader European growth strategy.
• OX2coreStrategic or Co-development Partner · 22 October 2025Partnership to accelerate deployment of large-scale renewable hydrogen production in the Nordic region. OX2 is a leading European renewable energy project developer. Joint pursuit of industrial-scale electrolyzer deployment opportunities in Nordics.
• RDI (Saudi Arabia Research, Development and Innovation Authority)majorStrategic or Co-development Partner · 1 January 2025Memorandum of Understanding signed with Saudi Arabia's RDI Authority to accelerate green hydrogen innovation in the Kingdom. Landmark agreement for market entry into the Middle East.
• BPT (Slovenia)minorStrategic or Co-development Partner · 1 January 2025Letter of Intent signed with BPT to expand green hydrogen in Slovenia. Part of European market expansion strategy.
• ZSW StuttgartcoreTechnology or Integration · 1 January 2025Centre for Solar Energy and Hydrogen Research Baden-Württemberg. Validated Stargate's electrolyser stacks. Independent third-party technology validation reinforcing credibility of ceramic-based alkaline electrolysis performance claims.
• ABBmajorStrategic or Co-development Partner · 1 January 2025Selected for ABB's H2 Springboard program. Collaboration with ABB and LUT University on shunt currents research. Listed as partner on Stargate website.
• Enel Green PowerminorOthers · 1 January 2025Listed alongside De Nora and Sunfire as peer companies in the IPCEI hydrogen technology wave. Both companies are IPCEI project participants together with Stargate Hydrogen.
• European Clean Hydrogen AllianceminorOthers · 1 January 2025Member of the European Clean Hydrogen Alliance, a EU industry alliance supporting deployment of clean hydrogen technologies.
• Hydrogen EuropeminorOthers · 1 January 2025Member of Hydrogen Europe, the industry association representing the European hydrogen community.
• Estonian Hydrogen AssociationminorOthers · 1 January 2025Member of Estonian Hydrogen Association (Eesti Vesinikutehnoloogiate Ühing), supporting the Estonian hydrogen ecosystem.
• Latvian Hydrogen Association (H2LV)minorOthers · 1 January 2025Member of the Latvian Hydrogen Association (H2LV), supporting Baltic region hydrogen development.
• RockfinmajorStrategic or Co-development Partner · 1 January 2025Polish engineering company that successfully integrated Stargate's Stellar Series stack. Rockfin is using the 0.5 MW stack as the core of their hydrogen electrolyser systems, with Stargate providing comprehensive integration support.
• VTT Technical Research Centre of FinlandcoreTechnology or Integration · 11 November 2024Collaboration agreement signed November 2024 for testing and development of next-generation alkaline electrolysers in Finland. VTT's facilities provide large-scale stack testing capacity, real-world validation, and system modelling expertise. VTT has been working with hydrogen electrolysers and fuel cells since 1998.
• FortumcoreStrategic or Co-development Partner · 10 June 2024Nordic energy company chose Stargate's Gateway 1 MW alkaline electrolyser system for hydrogen production at Kalla test centre in Loviisa, Finland. €17M R&D project. First hydrogen produced December 19, 2025. Positions Finland as a new entrant in Europe's hydrogen market.
• Fraunhofer IFAMcoreTechnology or Integration · 1 January 2021Leading European research institution. Technology validated by Fraunhofer IFAM Dresden. Collaboration on electrolyser technology development and validation. Listed as a key partner on Stargate's website.

Scale indicators11 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Nel ASA: Norwegian public company and one of the largest pure-play electrolyser manufacturers globally, offering both alkaline and PEM stacks and systems. Directly competes with Stargate in alkaline electrolysis for industrial hydrogen production.
• John Cockerill: Belgian engineering company with a dedicated electrolyser business focused on large-scale alkaline electrolyzer stacks and integrated systems. Directly comparable to Stargate's alkaline product portfolio targeting industrial decarbonisation.
• Sunfire: German alkaline and SOEC electrolyser manufacturer and fellow IPCEI hydrogen project participant alongside Stargate. Competes directly in the European alkaline electrolyser market for heavy-industry and e-fuels applications.
• thyssenkrupp Nucera: German-listed alkaline and PEM electrolyser specialist, particularly strong in chlor-alkali and large-scale green hydrogen projects. Direct competitor in industrial-scale alkaline electrolyser deployments.
• McPhy Energy: French alkaline electrolyser manufacturer with a similar product profile (small to mid-scale alkaline stacks and systems) and comparable European industrial focus. Rafael Pauli (Stargate VP of Sales) previously worked at McPhy.
• ITM Power: UK-listed PEM electrolyser specialist with large-scale manufacturing in Sheffield. Competes with Stargate in the European industrial hydrogen market, particularly UK and Nordic projects, though via PEM rather than alkaline chemistry.
• Plug Power: US-listed hydrogen and fuel cell company with a growing PEM electrolyser business. Competes globally for green hydrogen production contracts; broader incumbent with mobility and fuel cell operations alongside electrolysis.

Emerging players

• Enapter: German/Italian manufacturer of small-scale AEM (anion-exchange membrane) electrolyser stacks and systems. Targets distributed and small-scale hydrogen applications; overlaps with Stargate on alkaline chemistry positioning but at smaller unit sizes.

Broad incumbents

• Cummins (Accelera by Cummins): US-listed industrial conglomerate with a dedicated Accelera segment including PEM electrolyser manufacturing. Competes in industrial hydrogen production as part of a much broader power and drivetrain portfolio.
• Siemens Energy: German-listed energy major with a hydrogen unit offering PEM electrolyzers and integrated project solutions. Operates broadly across power generation, grid, and hydrogen, overlapping with Stargate in the industrial-scale hydrogen market.

Market position

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/stargate-hydrogen

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds6 records

Investors7 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 Stargate Hydrogen