Company lists · Data refreshed September 2026

Top 25 Energy efficiency financing companies based in the United Kingdom

Name: Energy efficiency financing companies 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 195 companies tracked

RevenueBase identified 195 company matches for energy efficiency financing companies associated with the United Kingdom as of September 2026 and tracks 10,697 professional contacts across them, including 3,351 with verified work emails. London is the largest hub.

This list covers company matches for energy efficiency financing companies 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

195Companies

10,697Contacts tracked

3,351Verified emails

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The 25 largest energy efficiency financing companies based in the United Kingdom

Ranked by team size

Top 25 of 195 company matches for energy efficiency financing companies 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	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
3	Scis Group	Exact match	Fareham, United KingdomHQ recorded Sep 16, 2026	51-200	60 contacts →
	Exact match “Hello.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4	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
5	The Improveasy Group	Exact match	Altrincham, United KingdomHQ recorded Sep 16, 2026	51-200	58 contacts →
	Exact match “Energy solutions made easy.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6	IZ Energy Services LTD	Exact match	Barking, United KingdomHQ recorded Sep 16, 2026	51-200	57 contacts →
	Exact match “IZ Energy is pioneering a sustainable future.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7	Cotswold Energy Group	Exact match	Stonehouse, United KingdomHQ recorded Sep 16, 2026	51-200	45 contacts →
	Exact match “Secure your greener future with renewable energy solutions!” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8	Savemoneycutcarbon	Exact match	Bury St Edmunds, United KingdomHQ recorded Sep 16, 2026	11-50	40 contacts →
	Exact match “SaveMoneyCutCarbon helps organisations reduce energy, water and carbon consumption across their buildings and operations.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9	Carbon Rewind	Exact match	Watford, United KingdomHQ recorded Sep 16, 2026	51-200	36 contacts →
	Exact match “At Carbon Rewind, we are optimistic about the energy future of the UK, and committed to doing our part to deliver the vision of a more sustainable future.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10	On-Site Energy LTD	Exact match	Liverpool, United KingdomHQ recorded Sep 16, 2026	11-50	28 contacts →
	Exact match “On-Site Energy was founded to support energy intensive manufacturers to improve their energy efficiency and achieve their sustainability goals through innovation and an…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11	Veolia Cogenco Combined Heat & Power	Exact match	Horsham, United KingdomHQ recorded Sep 16, 2026	51-200	24 contacts →
	Exact match “Because it is an efficient process, using far more of the available energy in a fuel than either traditional power or heat generation methods, CHP is inherently better for the…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12	Making Energy Greener	Exact match	Southport, United KingdomHQ recorded Sep 16, 2026	51-200	21 contacts →
	Exact match “With over 20 years of experience in the energy services sector, Making Energy Greener are committed to transforming our community's homes with innovative energy-saving products…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13	Horizon Energy Infrastructure	Exact match	Salisbury, United KingdomHQ recorded Sep 16, 2026	11-50	19 contacts →
	Exact match “Using our experience, expertise and culture of innovation we deliver tailored funding and partnership solutions to our customers.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14	Elite Energy	Exact match	Stockton-on-tees, United KingdomHQ recorded Sep 16, 2026	51-200	18 contacts →
	Exact match “Elite Energy – Powering a Greener, Smarter UK Elite Energy is an award-winning energy solutions company helping homeowners across the UK reduce energy bills, cut carbon emissions…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15	Ampyr Distributed Energy	Exact match	London, United KingdomHQ recorded Sep 16, 2026	11-50	17 contacts →
	Exact match “At AMPYR Distributed Energy we design, build, own, and operate clean energy technologies that help our customers go green and reduce their energy costs.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16	RMS Energy Solutions	Exact match	Coventry, United KingdomHQ recorded Sep 16, 2026	11-50	17 contacts →
	Exact match “Providing domestic energy efficiency solutions to save our customers money and save the environment.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17	Euro Energy Group	Exact match	Huncoat, United KingdomHQ recorded Sep 16, 2026	11-50	16 contacts →
	Exact match “Transforming UK homes and businesses into energy-efficient, future-ready spaces.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18	Shawton Energy	Exact match	Newton-le-willows, United KingdomHQ recorded Sep 16, 2026	11-50	16 contacts →
	Exact match “At Shawton Energy, we help businesses access cheaper, greener energy through innovative, fully funded solar solutions and flexible financing options.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19	Tallarna	Exact match	London, United KingdomHQ recorded Sep 16, 2026	11-50	15 contacts →
	Exact match “Tallarna is a climate tech and finance platform for sustainable impact.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20	Brighton And Hove Energy Services Co-Operative - Bhesco	Exact match	Brighton, United KingdomHQ recorded Sep 16, 2026	1-10	15 contacts →
	Exact match “Brighton and Hove Energy Services Co-operative (BHESCo) is a not-for-profit social enterprise on a mission to accelerate the clean energy transition by delivering affordable…” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21	Self Energy LTD	Exact match	Londres Inglaterra, United KingdomHQ recorded Sep 16, 2026	11-50	15 contacts →
	Exact match “Self Energy UK is the UK’s first decentralised Energy Services Company (ESCO) and a leader in the Energy as a Service (EaaS) model.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22	Energy Gain UK	Exact match	Trafford Park, United KingdomHQ recorded Sep 16, 2026	11-50	14 contacts →
	Exact match “Energy Gain UK consults, designs, executes, maintains and arranges funding for energy efficiency projects within the UK and global marketplace.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23	SNUGG	Exact match	Edinburgh, United KingdomHQ recorded Sep 16, 2026	11-50	14 contacts →
	Exact match “Snugg’s mission is to simplify the journey to energy efficient and sustainable homes, at scale.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24	Simply ECO LTD	Exact match	Birmingham, United KingdomHQ recorded Sep 16, 2026	11-50	14 contacts →
	Exact match “Simply Eco Ltd was established to assist people to gain access to Carbon Saving and Efficiency Measures under the government Energy Company Obligation (ECO) and Green Deal Schemes.” Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25	Zing Energy	Exact match	Cardiff, United KingdomHQ recorded Sep 16, 2026	11-50	13 contacts →
	Exact match “Zing Energy exists to help UK homes and businesses become more energy-efficient.” 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 financing companies”. 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 195 energy efficiency financing companies based in the United Kingdom

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Energy efficiency financing companies based in the United Kingdom at a glance

As of Sep 16, 2026

31.3%Verified-email coverage

54.9Average contacts per company

1-10Median size (employees)

16.9%Largest-city concentration · London

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 195 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 financing companies” 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 3,351 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 financing companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

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

RevenueBase identified 195 company matches for energy efficiency financing companies 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 financing companies?

London leads with 33 company records, followed by Manchester (9) and Birmingham (5).

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 3,351 professional contacts with verified work emails tracked across these 195 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.