Company lists · Data refreshed September 2026
Top 25 Hydrogen consultants based in the United States
RevenueBase identified 261 hydrogen consultants headquartered in the United States as of September 2026 and tracks 2,374 professional contacts across them, including 897 with verified work emails. Houston is the largest hub.
This list covers hydrogen consultants headquartered in the United States, 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.
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 hydrogen consultants based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 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 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 152 contacts → | ||||
Partial 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 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 130 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 81 contacts → | ||||
Indirect evidence “Fueling and Service Technologies, Inc.(FASTECH) is an end-to-end energy solutions company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 68 contacts → | ||||
Partial evidence “Pneumatic & Hydraulic (PHC) is a national leading full-service custom automation, test equipment & Hydrogen systems supplier at the same time distributing fluid power components…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 47 contacts → | ||||
Partial evidence “Precision High Pressure Technology for Industrial Gases and Hydrogen Fluitron is a market leader in engineering and safely manufacturing innovative high-pressure technologies…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 47 contacts → | ||||
Indirect evidence “EXCEL has evolved over the last four decades to meet the needs of the nuclear energy industry.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 46 contacts → | ||||
Indirect evidence “About Us Since 1995 HSI has continually improved the approach to assessing the life of catalyst tubes and other reformer furnace components.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 42 contacts → | ||||
Partial evidence “Clear Creek Associates, a hydrogeological consulting company, was started in September to provide a very high level of expertise in groundwater science.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 37 contacts → | ||||
Partial evidence “GenH2 is a technology leader in liquid hydrogen infrastructure systems, delivering breakthrough solutions to accelerate the clean energy transition.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 35 contacts → | ||||
Indirect evidence “Steelhead Composites is a world-class advanced manufacturing company, based in Golden, Colorado (USA).” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 32 contacts → | ||||
Partial evidence “Infintium Fuel Cell Systems is an original designer and manufacturer of the next generation of zero emission Hydrogen Power Cells for motive applications.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 30 contacts → | ||||
Partial evidence “Power+Energy supplies Hydrogen Purity Analyzers and Hydrogen Separators and is developing high- efficiency, low cost Hydrogen Generators for fuel cell applications.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 28 contacts → | ||||
Indirect evidence “Information Trends is a premier market research firm based in Sterling, Virginia.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 26 contacts → | ||||
Indirect evidence “Krishnan & Associates (K&A) is a full service power and energy industry consulting firm providing specialized marketing, market analytics, mergers & acquisitions and recruitment…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 25 contacts → | ||||
Partial evidence “Hyperion Companies was founded in 2011 with the goal of bringing a new wave of clean energy to the market in the form of hydrogen.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 23 contacts → | ||||
Indirect evidence “Geoscience Support Services (GEOSCIENCE) provides vital, specialized consulting to help clients overcome their most complex groundwater resource challenges.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 20 contacts → | ||||
Indirect evidence “INNOVATIVE TECHNOLOGY PARTNERSHIPS LLC (ITP) conducts consulting for High Reliability Organizations (HROs) in the nuclear community.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 20 contacts → | ||||
Indirect evidence “HOS Resources is a Lafayette, Louisiana-based energy consulting company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 19 contacts → | ||||
Indirect evidence “Itasca Denver, Inc.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 17 contacts → | ||||
Partial evidence “H2C is committed to accelerating the hydrogen economy by providing a breakthrough in the transportation and infrastructure required to bring green hydrogen to market now at a…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 17 contacts → | ||||
Partial evidence “We provide on-board liquid hydrogen energy storage and fuel cell power system integration services to unmanned aerial vehicle (UAV) manufacturers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 16 contacts → | ||||
Partial evidence “We manufacture and distribute high-pressure, gaseous hydrogen to lower costs, complexity, and carbon.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 14 contacts → | ||||
Indirect evidence “Downstream Advisors is a professional consulting firm specialized in the technical, commercial and financial aspects of the downstream petroleum industries – refining, marketing…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 14 contacts → | ||||
Indirect evidence “We are an Atlanta-based energy research and consulting NGO equipped with sophisticated analytical technologies and deep industry knowledge in the clean energy space.” 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: 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 hydrogen consultants.
- Partial evidence
- Its own public description names part of hydrogen consultants, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name 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 261 hydrogen consultants based in the United States
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Hydrogen consultants based in the United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 261 companies.
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 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.
- What qualifies
- Companies headquartered in the United States whose own description of what they do matches “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 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 hydrogen consultants, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
- 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, 897 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.
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 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 hydrogen consultants are there based in the United States?
RevenueBase identified 261 hydrogen consultants headquartered in the United States 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?
Electric Hydrogen, headquartered in Devens, tops this list with the largest team on record.
Which city has the most hydrogen consultants?
Houston leads with 21 headquartered companies, followed by New York (8) and Los Angeles (6).
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 897 verified decision-maker contacts tracked across these 261 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.