Company lists · Data refreshed September 2026

Top 25 Industrial energy efficiency firms based in the United Kingdom

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 540 companies tracked

RevenueBase identified 540 industrial energy efficiency firms headquartered in the United Kingdom as of September 2026 and tracks 13,561 professional contacts across them, including 4,708 with verified work emails. London is the largest hub.

This list covers industrial energy efficiency firms headquartered in the United Kingdom, 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 17, 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 17, 2026 86% judged on-target in blind review

540Companies

13,561Contacts tracked

4,708Verified emails

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

Ranked by team size

Top 25 of 540 industrial energy efficiency firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to industrial energy efficiency firms: 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	British GAS	Indirect evidence	Windsor, United KingdomHQ checked Sep 17, 2026	10001+	9,238 contacts →
	Indirect evidence “Taking care of things.” Source: RevenueBase Database · checked Sep 17, 2026
2	MARCH	Indirect evidence	Multiple Locations Uk-wide, United KingdomHQ checked Sep 17, 2026	1,001-5,000	273 contacts →
	Indirect evidence “We are March.” Source: RevenueBase Database · checked Sep 17, 2026
3	CFP Energy	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	171 contacts →
	Strong evidence “CFP Energy is a leading provider of energy and environmental solutions for industrial and commercial clients.” Source: RevenueBase Database · checked Sep 17, 2026
4	AMBER	Partial evidence	Cardiff, United KingdomHQ checked Sep 17, 2026	51-200	124 contacts →
	Partial evidence “We are an award-winning energy consultancy and certified B Corp™.” Source: RevenueBase Database · checked Sep 17, 2026
5	Tritility	Partial evidence	Jarrow, United KingdomHQ checked Sep 17, 2026	51-200	122 contacts →
	Partial evidence “Tritility is a UK business energy consultancy helping organisations reduce energy and overhead costs through smarter electricity, gas and water procurement.” Source: RevenueBase Database · checked Sep 17, 2026
6	TROO	Partial evidence	Doxford International Business Park, United KingdomHQ checked Sep 17, 2026	51-200	106 contacts →
	Partial evidence “Managing business energy can be overwhelming.” Source: RevenueBase Database · checked Sep 17, 2026
7	best.energy	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	97 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
8	Laser Energy	Partial evidence	West Malling, United KingdomHQ checked Sep 17, 2026	51-200	93 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
9	Katoni Engineering	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	51-200	90 contacts →
	Partial evidence “Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Source: RevenueBase Database · checked Sep 17, 2026
10	ECO Logic Partners	Partial evidence	Team Valley, United KingdomHQ checked Sep 17, 2026	11-50	66 contacts →
	Partial evidence “We bring good energy to the table to help you save yours.” Source: RevenueBase Database · checked Sep 17, 2026
11	JBA Engineering	Indirect evidence	Wynyard, United KingdomHQ checked Sep 17, 2026	11-50	63 contacts →
	Indirect evidence “JBA are industry-leading consultants, providing flexible engineering and design solutions, procurement, and construction services.” Source: RevenueBase Database · checked Sep 17, 2026
12	Cenergist	Strong evidence	Washington, United KingdomHQ checked Sep 17, 2026	201-500	62 contacts →
	Strong evidence “Cenergist is a specialist energy and water efficiency company in the UK and Europe.” Source: RevenueBase Database · checked Sep 17, 2026
13	Energy Drive	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	60 contacts →
	Strong evidence “We help heavy industry like steel become more energy efficient through the deployment of intelligent MV motor control via a zero-capex model: guaranteed net savings for the…” Source: RevenueBase Database · checked Sep 17, 2026
14	Businesswise Solutions	Partial evidence	Nelson, United KingdomHQ checked Sep 17, 2026	11-50	54 contacts →
	Partial evidence “We’re an energy management consultancy specialising in supporting energy-intensive businesses with energy procurement, energy management, and sustainability challenges.” Source: RevenueBase Database · checked Sep 17, 2026
15	Kelton	Partial evidence	Aberdeen, United KingdomHQ checked Sep 17, 2026	11-50	52 contacts →
	Partial evidence “Kelton is the energy industry’s consultancy partner.” Source: RevenueBase Database · checked Sep 17, 2026
16	Carbonxgen Limited	Partial evidence	Sandhurst, United KingdomHQ checked Sep 17, 2026	11-50	49 contacts →
	Partial evidence “Carbonxgen is a leading consultancy that specialises in solving complex energy and sustainability challenges.” Source: RevenueBase Database · checked Sep 17, 2026
17	Fusion For Business	Indirect evidence	Durham, United KingdomHQ checked Sep 17, 2026	51-200	49 contacts →
	Indirect evidence “At Fusion For Business, we believe in the value of genuine human connection - people doing business with people they trust.” Source: RevenueBase Database · checked Sep 17, 2026
18	Cotopaxi LTD	Partial evidence	White Moss Business Park, United KingdomHQ checked Sep 17, 2026	11-50	42 contacts →
	Partial evidence “Cotopaxi Energy is an independent engineering consultancy specialising in utility and carbon reduction.” Source: RevenueBase Database · checked Sep 17, 2026
19	Envantage, LOW Carbon And Energy Experts	Partial evidence	Manchester, United KingdomHQ checked Sep 17, 2026	11-50	41 contacts →
	Partial evidence “At Envantage, you will find the brightest and best experts in low carbon and business energy.” Source: RevenueBase Database · checked Sep 17, 2026
20	Savemoneycutcarbon	Partial evidence	Bury St Edmunds, United KingdomHQ checked Sep 17, 2026	11-50	40 contacts →
	Partial evidence “SaveMoneyCutCarbon helps organisations reduce energy, water and carbon consumption across their buildings and operations.” Source: RevenueBase Database · checked Sep 17, 2026
21	Evotech Technical Services	Indirect evidence	Elland, United KingdomHQ checked Sep 17, 2026	51-200	37 contacts →
	Indirect evidence “Evotech Technical Services delivers smarter, more sustainable buildings through innovative M&E solutions, expert engineering, and data-driven performance - helping clients reduce…” Source: RevenueBase Database · checked Sep 17, 2026
22	Everun	Partial evidence	Belfast, United KingdomHQ checked Sep 17, 2026	11-50	36 contacts →
	Partial evidence “As the world is becoming much more energy conscious, businesses everywhere are turning to more sustainable models of energy usage.” Source: RevenueBase Database · checked Sep 17, 2026
23	Carbon Numbers	Partial evidence	Elmstead Market, United KingdomHQ checked Sep 17, 2026	11-50	33 contacts →
	Partial evidence “Carbon Numbers is a UK-based energy management and low-carbon solutions specialist with a turnkey service to help organisations reduce energy costs, meet ESOS and SECR obligations…” Source: RevenueBase Database · checked Sep 17, 2026
24	Mcgrady Clarke	Partial evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 17, 2026	11-50	29 contacts →
	Partial evidence “McGrady Clarke provides business energy management and sustainability solutions across the UK and Europe.” Source: RevenueBase Database · checked Sep 17, 2026
25	Emissis	Strong evidence	Stokesley, United KingdomHQ checked Sep 17, 2026	51-200	29 contacts →
	Strong evidence “Engineering energy efficiency that pays off.” Source: RevenueBase Database · checked Sep 17, 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: industrial energy efficiency firms. 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 industrial energy efficiency firms.
Partial evidence: Its own public description names part of industrial energy efficiency firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name industrial energy efficiency firms. 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 540 industrial energy efficiency firms based in the United Kingdom

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

As of Sep 17, 2026

34.7%Verified-email coverage

25.1Average contacts per company

1-10Median size (employees)

15.9%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

318

11-50

173

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 540 companies.

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 industrial energy efficiency firms, 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 the United Kingdom whose own description of what they do matches “industrial energy efficiency firms”. 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 industrial energy efficiency firms), 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 industrial energy efficiency firms, and records with no verified work email. Companies headquartered outside United Kingdom 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, 4,708 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 17, 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.

Industrial energy efficiency firms by metro

Industrial energy efficiency firms in London86

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 industrial energy efficiency firms, 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 industrial energy efficiency firms are there based in the United Kingdom?

RevenueBase identified 540 industrial energy efficiency firms headquartered in the United Kingdom 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?

British GAS, headquartered in Windsor, tops this list with the largest team on record.

Which city has the most industrial energy efficiency firms?

London leads with 86 headquartered companies, followed by Manchester (22) and Bristol (10).

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 4,708 verified decision-maker contacts tracked across these 540 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 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 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.