Company lists · Data refreshed September 2026

Top 25 Hydrogen generation system companies worldwide

Name: Hydrogen generation system companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 939 companies tracked

RevenueBase identified 939 hydrogen generation system companies worldwide as of September 2026 and tracks 18,417 professional contacts across them, including 6,833 with verified work emails. The United States is the largest market and London the largest hub.

This list covers hydrogen generation system companies worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for hydrogen generation system companies follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

939Companies

18,417Contacts tracked

6,833Verified emails

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The 25 largest hydrogen generation system companies worldwide

Ranked by team size

Top 25 of 939 hydrogen generation system companies worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogen generation system companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Bloom Energy	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,221 contacts →
	Indirect evidence “Bloom Energy empowers businesses and communities to responsibly take charge of their energy.” Source: RevenueBase Database · checked Sep 20, 2026
2	Mitsubishi Power Americas	Partial evidence	Lake Mary, FL, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,859 contacts →
	Partial evidence “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Source: RevenueBase Database · checked Sep 20, 2026
3	Thyssenkrupp Nucera	Indirect evidence	Dortmund, GermanyHQ checked Sep 20, 2026	1,001-5,000	691 contacts →
	Indirect evidence “thyssenkrupp nucera offers world-leading technologies for high-efficiency electrolysis plants.” Source: RevenueBase Database · checked Sep 20, 2026
4	Ohmium	Partial evidence	Fremont, United StatesHQ checked Sep 20, 2026	501-1,000	547 contacts →
	Partial evidence “Ohmium's mission is to accelerate the adoption of green hydrogen to decarbonize hard-to-abate sectors and enable a low-carbon future.” Source: RevenueBase Database · checked Sep 20, 2026
5	Sunfire	Indirect evidence	Dresden, GermanyHQ checked Sep 20, 2026	501-1,000	427 contacts →
	Indirect evidence “Established in 2010 and based in Dresden, Germany, Sunfire is a world-leading industrial electrolysis company with two differentiated technologies.” Source: RevenueBase Database · checked Sep 20, 2026
6	Quest ONE	Indirect evidence	Augsburg, GermanyHQ checked Sep 20, 2026	501-1,000	378 contacts →
	Indirect evidence “As a technological pioneer, Quest One develops and produces innovative PEM electrolyzers and electrolyzer stacks.” Source: RevenueBase Database · checked Sep 20, 2026
7	Electric Hydrogen	Partial evidence	Devens, MA, United StatesHQ checked Sep 20, 2026	201-500	346 contacts →
	Partial evidence “Electric Hydrogen manufactures, delivers and commissions the world’s most powerful electrolyzers to make clean hydrogen projects economically viable today.” Source: RevenueBase Database · checked Sep 20, 2026
8	NEL Hydrogen	Partial evidence	Oslo, NorwayHQ checked Sep 20, 2026	201-500	327 contacts →
	Partial evidence “Nel has a history tracing back to 1927 and is today a leading pure play hydrogen electrolyser technology company with a global presence.” Source: RevenueBase Database · checked Sep 20, 2026
9	ITM Power	Indirect evidence	Sheffield, United KingdomHQ checked Sep 20, 2026	201-500	285 contacts →
	Indirect evidence “ITM Power was founded in and ITM Power plc was admitted to the AIM market of the London Stock Exchange in 2004.” Source: RevenueBase Database · checked Sep 20, 2026
10	LHYFE	Indirect evidence	Nantes, FranceHQ checked Sep 20, 2026	51-200	210 contacts →
	Indirect evidence “Lhyfe is a certain idea of the world, a world in which we can meet our energy needs by being part of the natural ecosystem rather than trying to dominate it.” Source: RevenueBase Database · checked Sep 20, 2026
11	Greenlight Innovation Corp	Partial evidence	Burnaby, BC, CanadaHQ checked Sep 20, 2026	201-500	191 contacts →
	Partial evidence “Greenlight Innovation is the leading global supplier of testing and manufacturing solutions for hydrogen fuel cells, electrolysers, and lithium batterie packs.” Source: RevenueBase Database · checked Sep 20, 2026
12	Elogen	Partial evidence	Les Ulis, FranceHQ checked Sep 20, 2026	51-200	179 contacts →
	Partial evidence “ELOGEN is a technology provider specialized in the design, the manufacturing and the maintenance of Hydrogen generators using water electrolysis, based on Proton Exchange Membrane…” Source: RevenueBase Database · checked Sep 20, 2026
13	Enapter	Partial evidence	Saerbeck, ItalyHQ checked Sep 20, 2026	201-500	168 contacts →
	Partial evidence “Enapter develops and manufactures AEM Electrolysers – disruptive devices producing green hydrogen to replace fossil fuels.” Source: RevenueBase Database · checked Sep 20, 2026
14	Newen Systems Pvt. LTD	Partial evidence	Vadodara, IndiaHQ checked Sep 20, 2026	51-200	167 contacts →
	Partial evidence “At Newen Systems, we are driving the future of clean energy with cutting-edge Battery Energy Storage Systems (BESS) and DC-coupled solutions.” Source: RevenueBase Database · checked Sep 20, 2026
15	RIX Industries	Strong evidence	Benicia, CA, United StatesHQ checked Sep 20, 2026	51-200	152 contacts →
	Strong evidence “Serving critical infrastructure markets, RIX Industries is a global leader in the design, development, and manufacturing of hydrogen and gas generation systems, precision high…” Source: RevenueBase Database · checked Sep 20, 2026
16	Symbio	Indirect evidence	St.-Fons, FranceHQ checked Sep 20, 2026	501-1,000	149 contacts →
	Indirect evidence “Symbio is a leading technology and industrial partner for sustainable mobility pioneers.” Source: RevenueBase Database · checked Sep 20, 2026
17	Powercell Group	Strong evidence	Gothenburg, SwedenHQ checked Sep 20, 2026	51-200	147 contacts →
	Strong evidence “PowerCell develops and produces hydrogen electric fuel cell stacks and systems with a uniquely high power density, targeting applications in the aviation, marine, power…” Source: RevenueBase Database · checked Sep 20, 2026
18	MCPHY	Partial evidence	Foussemagne, FranceHQ checked Sep 20, 2026	201-500	145 contacts →
	Partial evidence “As a leading "pure player" McPhy designs and manufactures a range of hydrogen production and valorization equipment, including electrolyzers built on robust and proven technology…” Source: RevenueBase Database · checked Sep 20, 2026
19	Oneh2, INC	Indirect evidence	Longview, NC, United StatesHQ checked Sep 20, 2026	51-200	130 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 20, 2026
20	Frames	Indirect evidence	Alphen Aan Den Rijn, NetherlandsHQ checked Sep 20, 2026	201-500	127 contacts →
	Indirect evidence “As of December 2021, Frames is part of Plug Power.” Source: RevenueBase Database · checked Sep 20, 2026
21	HDF Energy	Partial evidence	Blanquefort, FranceHQ checked Sep 20, 2026	51-200	123 contacts →
	Partial evidence “HDF Energy is a leading global player in the hydrogen industry, dedicated to developing large-scale hydrogen infrastructure and advanced multi-megawatt fuel cell technology.” Source: RevenueBase Database · checked Sep 20, 2026
22	2jcp	Indirect evidence	Štetí, Czech RepublicHQ checked Sep 20, 2026	501-1,000	119 contacts →
	Indirect evidence “At 2JCP, we design and manufacture complex solutions for gas-fired and clean energy.” Source: RevenueBase Database · checked Sep 20, 2026
23	Atawey Hydrogen	Indirect evidence	Le Bourget Du Lac, FranceHQ checked Sep 20, 2026	51-200	114 contacts →
	Indirect evidence “In a fast-changing world in which companies and local authorities are working to decarbonize mobility, the development of recharging technologies represents a crucial challenge.” Source: RevenueBase Database · checked Sep 20, 2026
24	Hysata	Partial evidence	Wollongong, AustraliaHQ checked Sep 20, 2026	11-50	113 contacts →
	Partial evidence “Our mission is to accelerate the world’s shift away from fossil fuels to green hydrogen by delivering the world’s best electrolyser.” Source: RevenueBase Database · checked Sep 20, 2026
25	Neuman & Esser Brasil	Indirect evidence	Belo Horizonte, United StatesHQ checked Sep 20, 2026	51-200	106 contacts →
	Indirect evidence “NEUMAN & ESSER is a reliable partner to the industry, driving both the energy transition and the circular economy with integrated solutions for the energy infrastructure of…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: hydrogen generation system companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names hydrogen generation system companies.
Partial evidence: Its own public description names part of hydrogen generation system companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogen generation system companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 939 hydrogen generation system companies worldwide

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Hydrogen generation system companies worldwide at a glance

As of Sep 20, 2026

37.1%Verified-email coverage

19.6Average contacts per company

11-50Median size (employees)

1.2%Largest-city concentration · London

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

414

11-50

312

51-200

133

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among hydrogen generation system companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for hydrogen generation system companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “hydrogen generation system companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names hydrogen generation system companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among hydrogen generation system companies, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 6,833 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Hydrogen generation system companies by location

9 lists · largest first

Every Hydrogen generation system companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names hydrogen generation system companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many hydrogen generation system companies are there worldwide?

RevenueBase identified 939 hydrogen generation system companies worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Bloom Energy, headquartered in San Jose, tops this list with the largest team on record.

Which country has the most hydrogen generation system companies?

The United States leads with 148 companies, followed by Germany (75) and India (65). Every hydrogen generation system companies list by country and city is linked on this page.

Which city has the most hydrogen generation system companies?

London leads with 11 headquartered companies, followed by Shanghai (10) and Singapore (8).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 6,833 verified decision-maker contacts tracked across these 939 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.