Company lists · Data refreshed November 2026

Top 14 Hydrogen electrolyzer makers based in the United Kingdom

RevenueBase identified 40 company matches for hydrogen electrolyzer makers associated with the United Kingdom as of November 2026 and tracks 1,059 professional contacts across them, including 324 with verified work emails. London is the largest hub.

This list covers company matches for hydrogen electrolyzer makers 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 November 6, 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 Nov 6, 2026 How this list was built
40Companies
1,059Contacts tracked
324Verified emails
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The 14 largest hydrogen electrolyzer makers based in the United Kingdom

Ranked by team size
Top 14 of 40 company matches for hydrogen electrolyzer makers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 Nov 6, 2026201-500301 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 202611-5050 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact matchDoncaster, United KingdomHQ recorded Nov 6, 202611-5045 contacts →

Exact match

“The technology to liberate hydrogen.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHungerford, United KingdomHQ recorded Nov 6, 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 · Nov 6, 2026 · View company records in RevenueBase
5Exact matchEdinburgh, United KingdomHQ recorded Nov 6, 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 · Nov 6, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Nov 6, 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 · Nov 6, 2026 · View company records in RevenueBase
7Exact matchOxford, United KingdomHQ recorded Nov 6, 20261-1013 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 · Nov 6, 2026 · View company records in RevenueBase
8Exact matchCranfield University, United KingdomHQ recorded Nov 6, 20261-1013 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 · Nov 6, 2026 · View company records in RevenueBase
9Exact matchGlasgow, United KingdomHQ recorded Nov 6, 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 · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-107 contacts →

Exact match

“The energy industry's leading source for hydrogen news and analysis.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchWinfrith Newburgh, United KingdomHQ recorded Nov 6, 20261-106 contacts →

Exact match

“Latent Drive develop and commercialise innovative green hydrogen technologies aimed at mass production and scalability.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSheffield, United KingdomHQ recorded Nov 6, 20261-106 contacts →

Exact match

“WD HydroTech has developed a novel hydrogen generation and compression platform designed specifically for distributed industrial and mobility applications.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Nov 6, 202651-2005 contacts →

Exact match

“Humble Hydrogen is a leading hydrogen solution provider and manufacturer.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchLondon, United KingdomHQ recorded Nov 6, 20261-104 contacts →

Exact match

“Meld Energy is a large scale UK green hydrogen developer with ambitions to produce 10%+ of country's electrolytic hydrogen powered by renewable energy.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 14 of 40 hydrogen electrolyzer makers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 324 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Hydrogen electrolyzer makers based in the United Kingdom at a glance

As of Nov 6, 2026
30.6%Verified-email coverage
26.5Average contacts per company
1-10Median size (employees)
27.5%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
26
11-50
10
51-200
1
201-500
3

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 40 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 “hydrogen electrolyzer makers” 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 324 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 November 6, 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.

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 “hydrogen electrolyzer makers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many hydrogen electrolyzer makers are there based in the United Kingdom?

RevenueBase identified 40 company matches for hydrogen electrolyzer makers associated with the United Kingdom as of November 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 hydrogen electrolyzer makers?

London leads with 11 company records, followed by Birmingham (2) and Brighton (2).

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 324 professional contacts with verified work emails tracked across these 40 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 November 6, 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 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.