Company lists · Data refreshed September 2026
Top 25 Fuel cell energy systems integrators worldwide
RevenueBase identified 314 fuel cell energy systems integrators worldwide as of September 2026 and tracks 6,346 professional contacts across them, including 1,840 with verified work emails and 1,106 with mobile numbers. The United States is the largest market and London the largest hub.
This list covers fuel cell energy systems integrators 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 3, 2026. Country and city lists for fuel cell energy systems integrators 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 fuel cell energy systems integrators worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 597 contacts → | ||||
Indirect evidence “OWL™ Services is the premier sales, installation, program management, compliance and service provider to industrial, commercial fleet, municipal and electrical vehicle charging…” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 2 | 225 contacts → | ||||
Indirect evidence “Exact Sun India specializes in delivering comprehensive mechanical, structural, and electrical design services, along with full-service installation solutions for both industrial…” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 3 | 224 contacts → | ||||
Partial evidence “Hexagon Purus enables zero emission mobility for a cleaner energy future.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 4 | 207 contacts → | ||||
Strong evidence “Powering the hydrogen future® with our outstanding fuel cells and service.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 5 | 198 contacts → | ||||
Strong 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 3, 2026Thanks. The Data Team will review it. | |||||
| 6 | 149 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 3, 2026Thanks. The Data Team will review it. | |||||
| 7 | 147 contacts → | ||||
Strong evidence “The Freudenberg Group has been inventing components for batteries and fuel cells since the early 1990s.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 8 | 125 contacts → | ||||
Strong evidence “EKPO Fuel Cell Technologies is a leading joint venture in the field of development and large-scale production of fuel cell stacks for CO2-neutral mobility.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 9 | 112 contacts → | ||||
Indirect evidence “As spin-off from the TU Munich, we're a highly tech-driven climate startup paving the way to 100% renewable, decarbonized future by making the most of biogas.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 10 | 102 contacts → | ||||
Partial evidence “power for energy SMA Altenso GmbH is a wholly owned subsidiary of SMA Solar Technology AG.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 11 | 91 contacts → | ||||
Indirect evidence “The future can only be influenced if we lay the foundation for it today.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 12 | 91 contacts → | ||||
Strong evidence “FC TecNrgy Pvt Ltd (FCT) is an India-based, leading private-sector Fuel Cells and Sustainable Energy & IT Solutions Enterprise.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 13 | 80 contacts → | ||||
Partial evidence “Fueling and Service Technologies, Inc.(FASTECH) is an end-to-end energy solutions company.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 14 | 62 contacts → | ||||
Indirect evidence “Keep the Lights On with LCM Environmental Since 1987, LCM Environmental has been the backbone of critical infrastructure, ensuring everything runs smoothly behind the scenes.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 15 | 59 contacts → | ||||
Partial evidence “Nata nel 1938, SACCIR è parte del gruppo SAMOVAR ha accompagnato l’evoluzione dell’energia in Italia, diventando un punto di riferimento nel settore dei multiservizi tecnologici.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 16 | 51 contacts → | ||||
Partial evidence “RACK is a leading energy solutions provider headquartered in Boca Raton, Florida.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 17 | 44 contacts → | ||||
Strong evidence “AVL Fuel Cell Canada Inc: AVL Fuel Cell Canada (“AVL FCC”) develops cutting-edge fuel cell and electrolyzer stack technologies for a wide range of applications, including power…” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 18 | 42 contacts → | ||||
Partial evidence “Proton Motor is a German GmbH which is owned a 100% by the holding Proton Motor Power Systems Plc Proton Motor Power Systems Plc is listed at the London Stock Exchange (AIM…” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 19 | 40 contacts → | ||||
Strong evidence “Fuel Cell Systems Ltd, a UK-based company with 15 years of expertise, specialises in fuel cell solutions and hydrogen refuelling systems.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 20 | 40 contacts → | ||||
Strong evidence “FFC manufactures New PMA fuel cells, and overhauls / repairs fuel cells for all aircraft platforms.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 21 | 40 contacts → | ||||
Partial evidence “Hypermotive deliver of complex systems engineering, electrical/electronic hardware and software design and manufacturing to enable low and zero carbon technologies to be…” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 22 | 39 contacts → | ||||
Partial evidence “We create rapid solutions for prototyping electrical systems for new future vehicle concepts, demonstrations, show vehicles and road vehicles, as well as providing technical…” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 23 | 37 contacts → | ||||
Strong evidence “We develop and manufacture market-ready, digitally connected fuel cell systems for industrial applications such as intralogistics.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 24 | 36 contacts → | ||||
Partial evidence “Range Energy is electrifying the commercial trucking industry, not by replacing tractors, but by bringing trailers to life.” Source: RevenueBase Database · checked Sep 3, 2026Thanks. The Data Team will review it. | |||||
| 25 | 36 contacts → | ||||
Strong evidence “CUBE CONCEPTS GmbH – Systementwickler für integrierte Energiesysteme Wir entwickeln und realisieren schlüsselfertige ganzheitliche Energiesysteme für Industrie- und…” Source: RevenueBase Database · checked Sep 3, 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: fuel cell energy systems integrators. 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 fuel cell energy systems integrators.
- Partial evidence
- Its own public description names part of fuel cell energy systems integrators, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name fuel cell energy systems integrators. 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 314 fuel cell energy systems integrators worldwide
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,840 reachable decision-makers.
Free signup · no credit card
Fuel cell energy systems integrators worldwide at a glance
As of Sep 3, 2026Companies by employee count
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 fuel cell energy systems integrators, 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
- 6 countries, largest first: the United States, Germany, Italy, the United Kingdom, India, Canada. Country and city lists for fuel cell energy systems integrators are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “fuel cell energy systems integrators”. 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 fuel cell energy systems integrators), 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 fuel cell energy systems integrators, 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, 1,840 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 between September 3, 2026 and September 14, 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.
Fuel cell energy systems integrators by location
6 lists · largest firstEvery Fuel cell energy systems integrators list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Fuel cell energy systems integrators based in the United States119
- Fuel cell energy systems integrators based in Germany46
- Fuel cell energy systems integrators based in Italy45
- Fuel cell energy systems integrators based in the United Kingdom38
- Fuel cell energy systems integrators based in India36
- Fuel cell energy systems integrators based in Canada30
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 fuel cell energy systems integrators, 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 fuel cell energy systems integrators are there worldwide?
RevenueBase identified 314 fuel cell energy systems integrators 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?
OWL Services, headquartered in Irving, tops this list with the largest team on record.
Which country has the most fuel cell energy systems integrators?
The United States leads with 119 companies, followed by Germany (46) and Italy (45). Every fuel cell energy systems integrators list by country and city is linked on this page.
Which city has the most fuel cell energy systems integrators?
London leads with 9 headquartered companies, followed by Burnaby (4) and Pune (4).
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 1,840 verified decision-maker contacts tracked across these 314 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled from the company graph between September 3, 2026 and September 14, 2026.
Ready to reach these companies? Verified emails and direct dials for all 314 fuel cell energy systems integrators worldwide. Start with a free account, no credit card.
Download this list →Related lists
Browse the directory
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.