Company lists · Data refreshed September 2026

Top 24 Hydrogen companies based in London, United Kingdom

Name: Hydrogen companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 12, 2026 57 companies tracked

Find 57 hydrogen companies based in London, United Kingdom, with 258 business contacts and 85 email addresses. Hydrogen companies on this list work across hydrogen production, processing, distribution, storage, equipment, and related services. Across the United Kingdom, London is the largest hub for this category.

Hydrogen companies produce, process, distribute, store, or use hydrogen and may provide related equipment, infrastructure, or services. This list covers companies whose products, facilities, or services directly support hydrogen production, processing, distribution, storage, mobility, power generation, or related industrial use. Ranked by team size, largest first. Data current as of September 12, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 12, 2026 86% judged on-target in blind review

57Companies

258Contacts tracked

85Verified emails

23Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 24 largest hydrogen companies based in London, United Kingdom

Ranked by team size

Top 24 of 57 hydrogen companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 12, 2026. RevenueBase Smart Search rates how each company's information relates to hydrogen companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Sonatrach Petroleum Corporation	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	36 contacts →
	Indirect evidence “SONATRACH PETROLEUM CORPORATION is an oil & energy company based out of United Kingdom.” Source: RevenueBase Database · checked Sep 12, 2026
2	World Hydrogen Leaders	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	21 contacts →
	Strong evidence “Accelerating the hydrogen transition through actionable insights and networking.” Source: RevenueBase Database · checked Sep 12, 2026
3	Oort Energy	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	14 contacts →
	Strong evidence “Oort Energy is a manufacturer of green hydrogen systems for energy storage and clean fuel.” Source: RevenueBase Database · checked Sep 12, 2026
4	Alchemy Energy Partners	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	12 contacts →
	Strong evidence “We provide unrivalled access, insight, and a human capital competitive advantage to industry leaders and pioneers across global Gas, LNG and Hydrogen industries advancing the…” Source: RevenueBase Database · checked Sep 12, 2026
5	Beyond2050	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	12 contacts →
	Strong evidence “We're a hydrogen-specialist political strategy and communications agency.” Source: RevenueBase Database · checked Sep 12, 2026
6	Deltic Energy	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	11 contacts →
	Indirect evidence “Deltic Energy Plc is an AIM-listed North Sea E&P company focused on derisking and investing in high impact and low carbon exploration opportunities, which are close to existing…” Source: RevenueBase Database · checked Sep 12, 2026
7	Hydrogen Energy Association	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	10 contacts →
	Strong evidence “The HEA uses the collective voices of our membership to advocate strongly for a positive social, political and economic environment for the development of hydrogen and its…” Source: RevenueBase Database · checked Sep 12, 2026
8	Hydrogen UK	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	10 contacts →
	Strong evidence “Hydrogen UK, formerly the Hydrogen Taskforce, is focused on delivering tangible policy developments for hydrogen production, development, and use in the UK.” Source: RevenueBase Database · checked Sep 12, 2026
9	First Hydrogen	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	7 contacts →
	Strong evidence “First Hydrogen is fast becoming the leading designer and manufacturer of zero-emission, long-range hydrogen-powered utility vehicles.” Source: RevenueBase Database · checked Sep 12, 2026
10	Humble Hydrogen LTD	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	51-200	6 contacts →
	Strong evidence “Humble Hydrogen is a leading hydrogen solution provider and manufacturer.” Source: RevenueBase Database · checked Sep 12, 2026
11	Hydrogen Insight	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	6 contacts →
	Strong evidence “The energy industry's leading source for hydrogen news and analysis.” Source: RevenueBase Database · checked Sep 12, 2026
12	Vedra Hydrogen	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	5 contacts →
	Strong evidence “Vedra’s Process makes Carbon Neutral Hydrogen at scale from in-situ oil while sequestering CO2.” Source: RevenueBase Database · checked Sep 12, 2026
13	Meld Energy	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	5 contacts →
	Strong evidence “Meld Energy is a large scale UK green hydrogen developer with ambitions to produce 10%+ of country's electrolytic hydrogen powered by renewable energy.” Source: RevenueBase Database · checked Sep 12, 2026
14	Prospex Energy PLC	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	4 contacts →
	Indirect evidence “AIM-quoted Prospex Energy plc is building a sizeable gas production and electricity generation investment portfolio focused on high impact, late stage onshore European…” Source: RevenueBase Database · checked Sep 12, 2026
15	LNG TV	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	4 contacts →
	Strong evidence “LNG TV is the globe’s first media channel dedicated to Gas, LNG and Hydrogen - providing unparalleled access and insight through a portfolio of programs, including dynamic…” Source: RevenueBase Database · checked Sep 12, 2026
16	Tvisi Motors	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	4 contacts →
	Strong evidence “Tvisi Motors Limited is building the world’s first Software-Defined Hydrogen Commercial Vehicles (SDHVs), redefining how hydrogen fuel cell electric vehicles are engineered…” Source: RevenueBase Database · checked Sep 12, 2026
17	Hydrogenesis	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	3 contacts →
	Strong evidence “Founded in 2020, HydroGenesis are a UK-based company building the leading position in natural hydrogen acreage and progressing exploration throughout the African continent.” Source: RevenueBase Database · checked Sep 12, 2026
18	Hydrogen Standard	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	3 contacts →
	Strong evidence “The Hydrogen Standard is a go-to portal for all news updates related to the hydrogen value chain and how it fits in the wider energy transition.” Source: RevenueBase Database · checked Sep 12, 2026
19	Hydrogen Challenge LTD	Indirect evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 12, 2026
20	Exogen Hydrogen Solutions	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	2 contacts →
	Strong evidence “At Exogen, we provide techno-economic insights and strategic consulting services for the global hydrogen economy, guiding businesses toward cost-effective decarbonization.” Source: RevenueBase Database · checked Sep 12, 2026
21	Convert Well LTD	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	2 contacts →
	Strong evidence “Convert Well is on a mission to enable natural gas fields to be converted at source to produce more and lower-cost hydrogen for industrial use.” Source: RevenueBase Database · checked Sep 12, 2026
22	HYVIZ	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	11-50	1 contacts →
	Strong evidence “HyViz Ltd is a leading low-cost Green Hydrogen and Green Ammonia producer.” Source: RevenueBase Database · checked Sep 12, 2026
23	Dolphyn Hydrogen	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	1 contacts →
	Strong evidence “At Dolphyn Hydrogen, we share a common belief that hydrogen is a critical component of our low carbon energy future and supporting enhancement of energy security whilst supporting…” Source: RevenueBase Database · checked Sep 12, 2026
24	Georgina Energy	Strong evidence	London, United KingdomHQ checked Sep 12, 2026	1-10	1 contacts →
	Strong evidence “Georgina Energy (#GEP) is a helium & hydrogen development & production company, based in Australia.” Source: RevenueBase Database · checked Sep 12, 2026

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 companies. 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 companies.
Partial evidence: Its own public description names part of hydrogen companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name hydrogen companies. 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 24 of 57 hydrogen companies based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 85 reachable decision-makers.

Free signup · no credit card

View the full list →

Hydrogen companies based in London, United Kingdom at a glance

As of Sep 12, 2026

32.9%Verified-email coverage

8.9%Mobile-number coverage

4.5Average contacts per company

1-10Median size (employees)

Sep 12, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

730–30

1131–60

161–90

090–180

0180+

Company record updated

Median 59.0d

00–30

13031–60

9561–90

1890–180

15180+

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 companies, 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 London, United Kingdom whose own description of what they do matches “hydrogen companies”. 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 companies), 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 companies, and records with no verified work email. Companies headquartered outside London 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, 85 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 12, 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

How many hydrogen companies are based in London, United Kingdom?

57 hydrogen companies are listed based in London, United Kingdom.

How many contacts and email addresses are available for hydrogen companies?

The list includes 258 business contacts and 85 email addresses for hydrogen companies.

Which city in the United Kingdom has the most hydrogen companies?

London leads the United Kingdom with 57 headquartered companies, followed by Bristol (6) and Cardiff (6).

Ready to reach these companies? Verified emails and direct dials for all 57 hydrogen companies based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Hydrogen companies by geography

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.