Company lists · Data refreshed September 2026
Top 25 Green hydrogen companies worldwide
RevenueBase identified 1,179 green hydrogen companies worldwide as of September 2026 and tracks 33,510 professional contacts across them, including 11,011 with verified work emails. The United States is the largest market and London the largest hub.
This list covers green hydrogen 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 green hydrogen 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.
The 25 largest green hydrogen companies worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,340 contacts → | ||||
Indirect evidence “ReNew is a leading decarbonisation solutions provider and the first Indian clean energy company to list on Nasdaq (Nasdaq: RNW).” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 2 | 2,578 contacts → | ||||
Indirect evidence “Greenko, is one of the World’s leading Energy Transition and Decarbonization solutions company, with an installed Renewable Energy capacity of ~7.5 GW across Wind, Solar and Hydro…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 3 | 2,037 contacts → | ||||
Strong evidence “Plug is building an end-to-end green hydrogen ecosystem, from production, storage and delivery to energy generation, to help its customers meet their business goals and…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 4 | 1,961 contacts → | ||||
Partial evidence “Envision Energy is a world-leading green technology company that provides renewable energy solutions for global enterprises, governments, and institutions.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 5 | 1,747 contacts → | ||||
Partial evidence “Avaada Group is a diversified clean energy conglomerate focused on the global energy transition, providing solutions in renewable power generation, solar PV manufacturing, green…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 6 | 1,298 contacts → | ||||
Indirect evidence “Somos una compañía comprometida con la energía y la movilidad sostenibles basadas en moléculas verdes.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 7 | 786 contacts → | ||||
Indirect evidence “We’re Accelera by Cummins - the clean energy technology brand with a bold mission: to power a more sustainable world, one zero-emissions solution at a time.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 8 | 711 contacts → | ||||
Partial evidence “Founded in 2020, Stegra (formerly H2 Green Steel) was created with the purpose to decarbonize hard-to-abate industry.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 9 | 691 contacts → | ||||
Indirect evidence “thyssenkrupp nucera offers world-leading technologies for high-efficiency electrolysis plants.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 10 | 565 contacts → | ||||
Partial evidence “Q ENERGY is Europe’s 360° green energy company.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 11 | 547 contacts → | ||||
Strong 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, 2026Thanks. The Data Team will review it. | |||||
| 12 | 480 contacts → | ||||
Indirect evidence “GP JOULE is an integrated energy supplier that covers the entire energy value chain, from generation to use – and from consulting and financing through to project planning…” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 13 | 455 contacts → | ||||
Indirect evidence “Created at the end of 2009, CVE is a French multi-energy, multi-country renewable energy producer.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 14 | 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, 2026Thanks. The Data Team will review it. | |||||
| 15 | 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, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 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, 2026Thanks. The Data Team will review it. | |||||
| 18 | 284 contacts → | ||||
Partial evidence “We are a company that can organically connect renewable energy, clean hydrogen, energy solutions, and the LNG business to create synergy.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 19 | 260 contacts → | ||||
Strong evidence “NEOM Green Hydrogen Company (NGHC) is on a mission to make a carbon-free, climate-safe future a reality.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 20 | 216 contacts → | ||||
Indirect evidence “TCI GECOMP es una empresa de Ingeniería y Construcción especializada en Energías renovables e Hidrógeno Verde con presencia en España, Perú, Chile y Argentina.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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, 2026Thanks. The Data Team will review it. | |||||
| 22 | 198 contacts → | ||||
Partial evidence “Greenfuel is India's Tier 1 supplier of green mobility and clean energy solutions to top OEMs.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 23 | 168 contacts → | ||||
Strong evidence “Enapter develops and manufactures AEM Electrolysers – disruptive devices producing green hydrogen to replace fossil fuels.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
| 24 | 167 contacts → | ||||
Indirect 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, 2026Thanks. The Data Team will review it. | |||||
| 25 | 166 contacts → | ||||
Indirect evidence “BIG - A Climate Tech Company - is a leader in industrial gas and greenhouse gas reduction technology.” Source: RevenueBase Database · checked Sep 20, 2026Thanks. The Data Team will review it. | |||||
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: green hydrogen 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 green hydrogen companies.
- Partial evidence
- Its own public description names part of green hydrogen companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name green hydrogen 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 1,179 green hydrogen companies worldwide
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Green hydrogen companies worldwide at a glance
As of Sep 20, 2026Companies by employee count
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 green hydrogen 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 green hydrogen companies are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “green hydrogen 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 green hydrogen 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 green hydrogen 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, 11,011 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.
Green hydrogen companies by location
10 lists · largest firstEvery Green hydrogen companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Green hydrogen companies based in the United States132
- Green hydrogen companies based in the United Kingdom100
- Green hydrogen companies based in Germany99
- Green hydrogen companies based in India79
- Green hydrogen companies based in Spain61
- Green hydrogen companies based in Australia56
- Green hydrogen companies based in France55
- Green hydrogen companies based in Canada47
- Green hydrogen companies based in the Netherlands38
- Green hydrogen companies based in Norway35
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 green hydrogen 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 green hydrogen companies are there worldwide?
RevenueBase identified 1,179 green hydrogen 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?
RENEW, headquartered in Gurugram, tops this list with the largest team on record.
Which country has the most green hydrogen companies?
The United States leads with 132 companies, followed by the United Kingdom (100) and Germany (99). Every green hydrogen companies list by country and city is linked on this page.
Which city has the most green hydrogen companies?
London leads with 25 headquartered companies, followed by Madrid (25) and Berlin (13).
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 11,011 verified decision-maker contacts tracked across these 1,179 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.