Company lists · Data refreshed October 2026

Top 25 Industrial energy efficiency services based in the United Kingdom

Name: Industrial energy efficiency services based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 16, 2026 887 companies tracked

RevenueBase identified 887 company matches for industrial energy efficiency services associated with the United Kingdom as of October 2026 and tracks 35,206 professional contacts across them, including 7,645 with verified work emails. London is the largest hub.

This list covers company matches for industrial energy efficiency services 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 16, 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 16, 2026 How this list was built

887Companies

35,206Contacts tracked

7,645Verified emails

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The 25 largest industrial energy efficiency services based in the United Kingdom

Ranked by team size

Top 25 of 887 company matches for industrial energy efficiency services based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 16, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	British GAS	Exact match	Windsor, United KingdomHQ recorded Oct 16, 2026	10001+	9,535 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
2	Dalkia UK	Exact match	London, United KingdomHQ recorded Oct 16, 2026	5,001-10,000	1,110 contacts →
	Exact match “Together, we’re delivering technical solutions for a better society and an Electric Britain Dalkia is one of the UK’s leading technical and energy services providers at the…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
3	Penspen	Exact match	London, United KingdomHQ recorded Oct 16, 2026	1,001-5,000	1,056 contacts →
	Exact match “Penspen designs, maintains, and optimises energy infrastructure to improve access to secure and sustainable energy for communities worldwide.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
4	EIC Partnership	Exact match	Redditch, United KingdomHQ recorded Oct 16, 2026	51-200	310 contacts →
	Exact match “EIC Partnership: A Legacy of Expertise, A Commitment to Sustainability With origins dating back to 1975, EIC has cultivated nearly 50 years of distinguished service in energy and…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
5	Hydrock, NOW Stantec	Exact match	Almondsbury, United KingdomHQ recorded Oct 16, 2026	501-1,000	252 contacts →
	Exact match “Hydrock now Stantec is an integrated engineering design, energy and sustainability consultancy.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
6	Avantis	Exact match	Cardiff, United KingdomHQ recorded Oct 16, 2026	501-1,000	212 contacts →
	Exact match “Avantis Group, based in the UK, is a global leader in energy and transportation.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
7	CFP Energy	Exact match	London, United KingdomHQ recorded Oct 16, 2026	201-500	173 contacts →
	Exact match “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
8	Consultus	Exact match	Leicester, United KingdomHQ recorded Oct 16, 2026	51-200	133 contacts →
	Exact match “Recognised as the Consultancy of the Year in 2021 by Energy Live News, Consultus delivers world-class consulting, buying and management services for Business Energy and Business…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
9	Optimised	Exact match	Bristol, United KingdomHQ recorded Oct 16, 2026	51-200	131 contacts →
	Exact match “Optimised exists to accelerate the shift to a low-carbon future by making energy management work; commercially, operationally and sustainably.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
10	Tritility	Exact match	Jarrow, United KingdomHQ recorded Oct 16, 2026	51-200	130 contacts →
	Exact match “Tritility is a UK business energy consultancy helping organisations reduce energy and overhead costs through smarter electricity, gas and water procurement.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
11	ZTP	Exact match	London, United KingdomHQ recorded Oct 16, 2026	51-200	128 contacts →
	Exact match “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
12	Longevity Partners	Exact match	London, United KingdomHQ recorded Oct 16, 2026	51-200	128 contacts →
	Exact match “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
13	Mitie Energy	Exact match	London, United KingdomHQ recorded Oct 16, 2026	51-200	126 contacts →
	Exact match “Mitie Energy are an award-winning, UK-based energy, utilities and sustainability solutions business.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
14	TROO	Exact match	Doxford International Business Park, United KingdomHQ recorded Oct 16, 2026	51-200	112 contacts →
	Exact match “Managing business energy can be overwhelming.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
15	Haven Power	Exact match	Ipswich, United KingdomHQ recorded Oct 16, 2026	201-500	107 contacts →
	Exact match “Haven Power is rebranding as Drax and we’ll soon be retiring this account.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
16	best.energy	Exact match	London, United KingdomHQ recorded Oct 16, 2026	51-200	105 contacts →
	Exact match “Best.Energy is a UK based company specialising in the measurement, control and reduction of energy consumption and costs within the industrial, commercial and public sectors.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
17	Eenergy	Exact match	London, United KingdomHQ recorded Oct 16, 2026	51-200	96 contacts →
	Exact match “eEnergy (AIM: EAAS) is a UK-based Energy-as-a-Service (EaaS) provider, funding and delivering energy-saving and energy-generating solutions across multi-site public sector and…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
18	Byworth Boilers Limited	Exact match	Keighley, United KingdomHQ recorded Oct 16, 2026	51-200	95 contacts →
	Exact match “Your industrial boiler is at the heart of your operations.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
19	Spirax Sarco UK And Ireland	Exact match	Cheltenham, United KingdomHQ recorded Oct 16, 2026	1,001-5,000	95 contacts →
	Exact match “Why are we here?” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
20	The Green Energy Advice Bureau	Exact match	Sunderland, United KingdomHQ recorded Oct 16, 2026	51-200	94 contacts →
	Exact match “The Green Energy Advice Bureau are a leading independent award-winning UK commercial energy consultancy.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
21	Katoni Engineering	Exact match	Aberdeen, United KingdomHQ recorded Oct 16, 2026	51-200	93 contacts →
	Exact match “Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
22	PJD Mechanical Engineering	Exact match	Doncaster, United KingdomHQ recorded Oct 16, 2026	51-200	90 contacts →
	Exact match “PJD Mechanical Engineering Ltd Ltd has worked with a number of leading clients, operators and technology companies throughout the UK energy sector for over 30 years.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
23	Laser Energy	Exact match	West Malling, United KingdomHQ recorded Oct 16, 2026	51-200	88 contacts →
	Exact match “At LASER Energy, part of the Commercial Services Group Energy & Environment portfolio, a wholly-owned business unit of Kent County Council, we help public sector organisations…” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
24	Sustainable Advantage	Exact match	London, United KingdomHQ recorded Oct 16, 2026	51-200	86 contacts →
	Exact match “Sustainable Advantage partners with Private Equity funds and businesses across the UK, France, and wider Europe.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase
25	Alfa Energy An Edison Energy Company	Exact match	London, United KingdomHQ recorded Oct 16, 2026	201-500	83 contacts →
	Exact match “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Recorded in the RevenueBase company graph · Oct 16, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “industrial energy efficiency services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 887 industrial energy efficiency services based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 7,645 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Industrial energy efficiency services based in the United Kingdom at a glance

As of Oct 16, 2026

21.7%Verified-email coverage

39.7Average contacts per company

1-10Median size (employees)

15.3%Largest-city concentration · London

Oct 16, 2026Page data refreshed

Companies by employee count

1-10

505

11-50

284

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 887 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 “industrial energy efficiency services” 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 7,645 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 16, 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.

Industrial energy efficiency services 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 “industrial energy efficiency services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many industrial energy efficiency services are there based in the United Kingdom?

RevenueBase identified 887 company matches for industrial energy efficiency services 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?

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

Which city has the most industrial energy efficiency services?

London leads with 136 company records, followed by Manchester (26) and Bristol (18).

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 7,645 professional contacts with verified work emails tracked across these 887 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 16, 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.