Company lists · Data refreshed October 2026

Top 25 Green hydrogen engineering companies based in the United Kingdom

RevenueBase identified 129 company matches for green hydrogen engineering companies associated with the United Kingdom as of October 2026 and tracks 2,257 professional contacts across them, including 812 with verified work emails. London is the largest hub.

This list covers company matches for green hydrogen engineering companies associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 13, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 13, 2026 How this list was built
129Companies
2,257Contacts tracked
812Verified emails
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The 25 largest green hydrogen engineering companies based in the United Kingdom

Ranked by team size
Top 25 of 129 company matches for green hydrogen engineering companies based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 13, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSheffield, United KingdomHQ recorded Oct 13, 2026201-500298 contacts →

Exact match

“ITM Power was founded in and ITM Power plc was admitted to the AIM market of the London Stock Exchange in 2004.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
2Exact matchNewcastle, United KingdomHQ recorded Oct 13, 202651-200163 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
3Exact matchStockport, United KingdomHQ recorded Oct 13, 2026201-500126 contacts →

Exact match

“Edina is an energy transition solutions provider for on-site generation using hydrogen-enabled MWM Gas Engines, HVO Standby Generation and Battery Energy Storage.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
4Exact matchBristol, United KingdomHQ recorded Oct 13, 202651-200104 contacts →

Exact match

“Everoze is an employee-owned renewables, green hydrogen and storage consultancy.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
5Exact matchCranleigh, United KingdomHQ recorded Oct 13, 202651-20092 contacts →

Exact match

“AFC Energy is the leading provider of Hydrogen fuel cell technology to generate clean off-grid energy.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
6Exact matchStone, United KingdomHQ recorded Oct 13, 202651-20062 contacts →

Exact match

“We're focused on delivering products and solutions to the green energy industry with a strong focus on Hydrogen, Biomethane and Natural Gas.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Oct 13, 202611-5049 contacts →

Exact match

“The world's first high pressure, ultra-efficient electrolyser for the lowest cost of pressurised green hydrogen.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
8Exact matchDoncaster, United KingdomHQ recorded Oct 13, 202611-5045 contacts →

Exact match

“The technology to liberate hydrogen.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
9Exact matchHungerford, United KingdomHQ recorded Oct 13, 202611-5039 contacts →

Exact match

“Fuel Cell Systems Ltd, a UK-based company with 15 years of expertise, specialises in fuel cell solutions and hydrogen refuelling systems.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
10Exact matchEdinburgh, United KingdomHQ recorded Oct 13, 202611-5031 contacts →

Exact match

“Based in Scotland, Logan is a designer, supplier, and integrator of complete hydrogen production, refuelling, compression, storage, dispensing and fuel cell solutions.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
11Exact matchCity Of London, United KingdomHQ recorded Oct 13, 202611-5027 contacts →

Exact match

“Pace is the world’s leading provider of engineering design to the CCS and blue hydrogen industries.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
12Exact matchOxford, United KingdomHQ recorded Oct 13, 202651-20027 contacts →

Exact match

“Ryze Power provides complete solutions in the alternative fuels space as sectors transition towards net zero.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
13Exact matchEdinburgh, United KingdomHQ recorded Oct 13, 202611-5026 contacts →

Exact match

“Green Cat Hydrogen develops green hydrogen projects.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
14Exact matchBicester, United KingdomHQ recorded Oct 13, 202611-5023 contacts →

Exact match

“Modular, agile infrastructure to move, store and utilise green hydrogen in underserved sectors.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
15Exact matchStanlow, United KingdomHQ recorded Oct 13, 202611-5023 contacts →

Exact match

“EET Hydrogen is a leading player in the energy transition and is developing the first large scale, low carbon hydrogen production hub in the UK.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
16Exact matchOxford, United KingdomHQ recorded Oct 13, 202611-5023 contacts →

Exact match

“Hygen is a leading developer, producer and asset owner of low-carbon hydrogen production facilities in the UK and Europe, focusing on the decarbonisation of mobility…”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
17Exact matchStokesley, United KingdomHQ recorded Oct 13, 202611-5022 contacts →

Exact match

“Carlton Power Group is an independent, UK energy development company formed in 1995, with offices in Stokesley, North Yorkshire and Edinburgh.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
18Exact matchLeeds, United KingdomHQ recorded Oct 13, 202611-5017 contacts →

Exact match

“At N-Gen, we’re helping our customers to lead the race towards decarbonisation with low carbon hydrogen.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
19Exact matchLondon, United KingdomHQ recorded Oct 13, 202611-5014 contacts →

Exact match

“Oort Energy is a manufacturer of green hydrogen systems for energy storage and clean fuel.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
20Exact matchCranfield University, United KingdomHQ recorded Oct 13, 20261-1014 contacts →

Exact match

“HyWaves' goal is to increase locally produced hydrogen by simplifying solar to hydrogen power electronics and enhancing electrolysers to increase green hydrogen production.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
21Exact matchOxford, United KingdomHQ recorded Oct 13, 20261-1012 contacts →

Exact match

“Electrogenos sits at the cutting-edge of the Alkaline Electrolyser technology, advancing innovation in the field of green-hydrogen production.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
22Exact matchBath, United KingdomHQ recorded Oct 13, 202611-5011 contacts →

Exact match

“The world needs more green energy, and it needs it fast.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
23Exact matchLondon, United KingdomHQ recorded Oct 13, 20261-1010 contacts →

Exact match

“Delta H is a consultancy dedicated to accelerating the transition to zero carbon energy systems.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
24Exact matchKington St. Michael, United KingdomHQ recorded Oct 13, 202611-509 contacts →

Exact match

“Elemental Energy enables 24/7 power at scale, on or off the grid, using a combination of renewables, battery storage, and hydrogen technology in an integrated, compact power unit.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase
25Exact matchGlasgow, United KingdomHQ recorded Oct 13, 20261-108 contacts →

Exact match

“Clyde Hydrogen System’s breakthrough decoupled electrolysis technology delivers high pressure green hydrogen at scale and at low cost.”

Recorded in the RevenueBase company graph · Oct 13, 2026 · View company records in RevenueBase

Showing 25 of 129 green hydrogen engineering companies based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 812 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Green hydrogen engineering companies based in the United Kingdom at a glance

As of Oct 13, 2026
36.0%Verified-email coverage
17.5Average contacts per company
1-10Median size (employees)
23.3%Largest-city concentration · London
Oct 13, 2026Page data refreshed

Companies by employee count

1-10
75
11-50
39
51-200
11
201-500
4

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 129 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “green hydrogen engineering companies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 812 professional contacts with verified work emails across the full matched dataset. 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 October 13, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Green hydrogen engineering companies by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “green hydrogen engineering companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many green hydrogen engineering companies are there based in the United Kingdom?

RevenueBase identified 129 company matches for green hydrogen engineering companies associated with the United Kingdom as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

ITM Power tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most green hydrogen engineering companies?

London leads with 30 company records, followed by Edinburgh (6) and Cardiff (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 812 professional contacts with verified work emails tracked across these 129 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 13, 2026.

Ready to reach these companies? Verified emails and direct dials for all 129 green hydrogen engineering companies based in the United Kingdom. Start with a free account, no credit card.

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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 SmartSearch, 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.