Company lists · Data refreshed September 2026
Top 25 Green hydrogen consultants worldwide
RevenueBase identified 959 green hydrogen consultants worldwide as of September 2026 and tracks 11,179 professional contacts across them, including 4,290 with verified work emails. Germany is the largest market and London the largest hub.
This list covers green hydrogen consultants 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 21, 2026. Country and city lists for green hydrogen consultants 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 consultants worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 691 contacts → | ||||
Indirect evidence “thyssenkrupp nucera offers world-leading technologies for high-efficiency electrolysis plants.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 167 contacts → | ||||
Partial evidence “Sunkonnect is a leading energy transition and renewable energy consulting company delivering end-to-end engineering, quality assurance, project management consultancy, and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 154 contacts → | ||||
Strong evidence “TES is a global green energy company focused on developing giga-scale projects to produce hydrogen-based e-fuels, such as e-NG (electric natural gas made from green hydrogen and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 137 contacts → | ||||
Indirect evidence “GeoPura has a totally zero emissions answer to how we’re going to generate and distribute the vast amount of energy required to decarbonise our global economies.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 131 contacts → | ||||
Partial evidence “AM Green is indirectly wholly owned and controlled by the founders of Hyderabad-based Greenko Group - Anil Chalamalasetty and Mahesh Kolli.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 127 contacts → | ||||
Partial evidence “Hynamics est la filiale 100% du groupe EDF qui produit et commercialise de l'hydrogène bas carbone; elle adresse les deux marchés les plus émetteurs de CO2 que sont l’industrie et…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 122 contacts → | ||||
Indirect evidence “SOFREGAZ is a leading independent engineering company, created in 1959 by Gaz de France, with over 1300 projects across 95 countries.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 113 contacts → | ||||
Strong 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 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 113 contacts → | ||||
Strong evidence “Hygenco aims to be a global leader in deploying Green Hydrogen and Green Ammonia powered industry solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 109 contacts → | ||||
Indirect evidence “Die Tyczka Gruppe ist ein Gasespezialist mit Fokus auf Flüssiggas, Industriegase und Wasserstoff.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 109 contacts → | ||||
Indirect evidence “Rishabh Pro Engineering Services Private Limited is a leading multidisciplinary design engineering firm with over two decades of experience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 100 contacts → | ||||
Strong evidence “Everoze is an employee-owned renewables, green hydrogen and storage consultancy.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 85 contacts → | ||||
Partial evidence “The Fichtner Group is one of the leading independent engineering consultancy firms in the world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 81 contacts → | ||||
Strong evidence “GH2 Solar is India’s only integrated green hydrogen platform from electron to molecule.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 76 contacts → | ||||
Partial evidence “Founded in 2006, HINICIO is a strategic consulting firm specialized in the decarbonization challenges of hard-to-abate sectors, with more than 20 years of experience in hydrogen…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 71 contacts → | ||||
Indirect evidence “SEG Ingeniería es una compañía multinacional uruguaya con 26 años de trayectoria en la región integrada por un grupo de empresas cuyas áreas de negocio son: Eficiencia Energética…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 71 contacts → | ||||
Partial evidence “SHIFT POWER ENERGIZE YOUR WORLD Hydrogenics, a Cummins company, is an industry leader in designing, manufacturing, building and installing industrial and commercial Hydrogen…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 66 contacts → | ||||
Partial evidence “Everfuel is the new fueling hydrogen fuel company in Europe.” Source: RevenueBase Database · checked Sep 21, 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 consultants. 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 consultants.
- Partial evidence
- Its own public description names part of green hydrogen consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name green hydrogen consultants. 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 959 green hydrogen consultants worldwide
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Green hydrogen consultants worldwide at a glance
As of Sep 21, 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 consultants, 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 consultants are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “green hydrogen consultants”. 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 consultants), 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 consultants, 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, 4,290 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 21, 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 consultants by location
8 lists · largest firstEvery Green hydrogen consultants list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Green hydrogen consultants based in Germany94
- Green hydrogen consultants based in the United Kingdom87
- Green hydrogen consultants based in the United States87
- Green hydrogen consultants based in India64
- Green hydrogen consultants based in France54
- Green hydrogen consultants based in Spain53
- Green hydrogen consultants based in the Netherlands42
- Green hydrogen consultants based in Australia27
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 consultants, 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 consultants are there worldwide?
RevenueBase identified 959 green hydrogen consultants 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?
Plug Power, headquartered in Latham, tops this list with the largest team on record.
Which country has the most green hydrogen consultants?
Germany leads with 94 companies, followed by the United Kingdom (87) and the United States (87). Every green hydrogen consultants list by country and city is linked on this page.
Which city has the most green hydrogen consultants?
London leads with 29 headquartered companies, followed by Madrid (16) and Paris (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 4,290 verified decision-maker contacts tracked across these 959 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 21, 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.