Company lists · Data refreshed September 2026

Top 25 Energy efficiency consultants based in the United Kingdom

Name: Energy efficiency consultants based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 668 companies tracked

RevenueBase identified 668 company matches for energy efficiency consultants associated with the United Kingdom as of September 2026 and tracks 15,146 professional contacts across them, including 5,423 with verified work emails. London is the largest hub.

This list covers company matches for energy efficiency consultants 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 September 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 Sep 16, 2026 How this list was built

668Companies

15,146Contacts tracked

5,423Verified emails

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The 25 largest energy efficiency consultants based in the United Kingdom

Ranked by team size

Top 25 of 668 company matches for energy efficiency consultants based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 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 Sep 16, 2026	10001+	9,238 contacts →
	Exact match “Taking care of things.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2	Atelier TEN	Exact match	London, United KingdomHQ recorded Sep 16, 2026	51-200	323 contacts →
	Exact match “As environmental design consultants, building services engineers and lighting designers, we are committed to high performance and sustainable design within the built environment.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3	EIC Partnership	Exact match	Redditch, United KingdomHQ recorded Sep 16, 2026	51-200	316 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 · Sep 16, 2026 · View company records in RevenueBase
4	CFP Energy	Exact match	London, United KingdomHQ recorded Sep 16, 2026	201-500	171 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 · Sep 16, 2026 · View company records in RevenueBase
5	AMBER	Exact match	Cardiff, United KingdomHQ recorded Sep 16, 2026	51-200	124 contacts →
	Exact match “We are an award-winning energy consultancy and certified B Corp™.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6	Tritility	Exact match	Jarrow, United KingdomHQ recorded Sep 16, 2026	51-200	122 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 · Sep 16, 2026 · View company records in RevenueBase
7	ZTP	Exact match	London, United KingdomHQ recorded Sep 16, 2026	51-200	115 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 · Sep 16, 2026 · View company records in RevenueBase
8	Longevity Partners	Exact match	London, United KingdomHQ recorded Sep 16, 2026	51-200	115 contacts →
	Exact match “Longevity Partners is a multidisciplinary energy and sustainability consultancy.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9	TROO	Exact match	Doxford International Business Park, United KingdomHQ recorded Sep 16, 2026	51-200	106 contacts →
	Exact match “Managing business energy can be overwhelming.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10	Katoni Engineering	Exact match	Aberdeen, United KingdomHQ recorded Sep 16, 2026	51-200	90 contacts →
	Exact match “Katoni provides consulting, engineering, optimisation and emissions reduction support for the Energy Sector.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11	The Green Energy Advice Bureau	Exact match	Sunderland, United KingdomHQ recorded Sep 16, 2026	51-200	90 contacts →
	Exact match “The Green Energy Advice Bureau are a leading independent award-winning UK commercial energy consultancy.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12	clearvue.business	Exact match	Gateshead, United KingdomHQ recorded Sep 16, 2026	51-200	81 contacts →
	Exact match “We enable businesses to succeed in the environmental components of their ESG strategies through comprehensive net zero consulting services and ground-breaking carbon and energy…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13	Team Energy Auditing Agency LTD	Exact match	Milton Keynes, United KingdomHQ recorded Sep 16, 2026	51-200	69 contacts →
	Exact match “TEAM is the UK’s leading supplier of carbon and energy management solutions committed to driving the efficiency and sustainability of energy consumption and environmental…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14	ECO Logic Partners	Exact match	Team Valley, United KingdomHQ recorded Sep 16, 2026	11-50	66 contacts →
	Exact match “We bring good energy to the table to help you save yours.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15	Cenergist	Exact match	Washington, United KingdomHQ recorded Sep 16, 2026	201-500	62 contacts →
	Exact match “Cenergist is a specialist energy and water efficiency company in the UK and Europe.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16	RYBKA	Exact match	Edinburgh, United KingdomHQ recorded Sep 16, 2026	51-200	61 contacts →
	Exact match “Rybka is a leading Building Services Engineering, Low Carbon and Sustainability Consultancy with a wide geographical spread and a focus on providing commercially viable, energy…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17	Energy Drive	Exact match	London, United KingdomHQ recorded Sep 16, 2026	51-200	60 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18	RSP Consulting Engineers	Exact match	Edinburgh, United KingdomHQ recorded Sep 16, 2026	51-200	60 contacts →
	Exact match “RSP Consulting Engineers LLP are leaders in sustainable and low energy building services design.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19	Businesswise Solutions	Exact match	Nelson, United KingdomHQ recorded Sep 16, 2026	11-50	54 contacts →
	Exact match “We’re an energy management consultancy specialising in supporting energy-intensive businesses with energy procurement, energy management, and sustainability challenges.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20	UCR Consultants Limited	Exact match	Leicester, United KingdomHQ recorded Sep 16, 2026	11-50	53 contacts →
	Exact match “UCR Consultants is a company dedicated to providing their clients with an impartial, professional service and a fair price for the energy they use.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21	Kelton	Exact match	Aberdeen, United KingdomHQ recorded Sep 16, 2026	11-50	52 contacts →
	Exact match “Kelton is the energy industry’s consultancy partner.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22	Advantage Utilities LTD	Exact match	London, United KingdomHQ recorded Sep 16, 2026	11-50	50 contacts →
	Exact match “Advantage Utilities mission is to provide customers with a “One-Stop-Shop” for all their energy needs – with Market Leading Data/Expertise and Unrivalled “Drop Everything”…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23	Carbonxgen Limited	Exact match	Sandhurst, United KingdomHQ recorded Sep 16, 2026	11-50	49 contacts →
	Exact match “Carbonxgen is a leading consultancy that specialises in solving complex energy and sustainability challenges.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24	Fusion For Business	Exact match	Durham, United KingdomHQ recorded Sep 16, 2026	51-200	49 contacts →
	Exact match “At Fusion For Business, we believe in the value of genuine human connection - people doing business with people they trust.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25	BCR Associates B Corp Ecovadis	Exact match	Exeter, United KingdomHQ recorded Sep 16, 2026	11-50	45 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 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 “energy efficiency consultants”. 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 668 energy efficiency consultants based in the United Kingdom

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Energy efficiency consultants based in the United Kingdom at a glance

As of Sep 16, 2026

35.8%Verified-email coverage

22.7Average contacts per company

1-10Median size (employees)

13.3%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

435

11-50

185

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 668 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 “energy efficiency consultants” 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 5,423 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 September 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.

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

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

RevenueBase identified 668 company matches for energy efficiency consultants associated with the United Kingdom as of September 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 energy efficiency consultants?

London leads with 89 company records, followed by Manchester (22) and Nottingham (13).

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 5,423 professional contacts with verified work emails tracked across these 668 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 September 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.