Company lists · Data refreshed September 2026

Top 25 Residential energy management companies based in the United Kingdom

RevenueBase identified 659 residential energy management companies headquartered in the United Kingdom as of September 2026 and tracks 22,338 professional contacts across them, including 7,555 with verified work emails. London is the largest hub.

This list covers residential energy management companies 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 21, 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 21, 2026 86% judged on-target in blind review
659Companies
22,338Contacts tracked
7,555Verified emails
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The 25 largest residential energy management companies based in the United Kingdom

Ranked by team size
Top 25 of 659 residential energy management companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to residential energy management 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceWindsor, United KingdomHQ checked Sep 21, 202610001+9,238 contacts →

Indirect evidence

“Taking care of things.”

Source: RevenueBase Database · checked Sep 21, 2026
2Partial evidenceWindsor, United KingdomHQ checked Sep 21, 202610001+4,555 contacts →

Partial evidence

“Centrica is an international energy services and solutions company, founded on a 200-year heritage of serving customers in homes and businesses.”

Source: RevenueBase Database · checked Sep 21, 2026
3Indirect evidenceWalton-on-thames, United KingdomHQ checked Sep 21, 2026201-500658 contacts →

Indirect evidence

“We are passionate about driving sustainable change for our planet.”

Source: RevenueBase Database · checked Sep 21, 2026
4Partial evidenceLondon, United KingdomHQ checked Sep 21, 2026501-1,000595 contacts →

Partial evidence

“Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination.”

Source: RevenueBase Database · checked Sep 21, 2026
5Partial evidenceGateshead, United KingdomHQ checked Sep 21, 2026501-1,000509 contacts →

Partial evidence

“As leaders in our field, we’re trusted by over businesses to provide a full energy service.”

Source: RevenueBase Database · checked Sep 21, 2026
6Indirect evidenceLuton, United KingdomHQ checked Sep 21, 2026n/a345 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 21, 2026
7Strong evidenceBury, United KingdomHQ checked Sep 21, 2026201-500206 contacts →

Strong evidence

“Who we are » The UK’s leading Energy Management company » Our aim is to increase energy performance within buildings » Deliver energy projects to maximise customer return on…”

Source: RevenueBase Database · checked Sep 21, 2026
8Indirect evidenceEdinburgh, United KingdomHQ checked Sep 21, 202651-200170 contacts →

Indirect evidence

“Changeworks is a leading organisation dedicated to decarbonising Scotland’s homes and a just transition to net zero.”

Source: RevenueBase Database · checked Sep 21, 2026
9Partial evidenceStallingborough, United KingdomHQ checked Sep 21, 2026201-500168 contacts →

Partial evidence

“We give you control of your generated green energy, creating the ultimate eco-smart home.”

Source: RevenueBase Database · checked Sep 21, 2026
10Partial evidenceManchester, United KingdomHQ checked Sep 21, 202651-200124 contacts →

Partial evidence

“Smart Choice Metering delivers smart meter solutions to domestic customers, businesses and energy suppliers nationwide.”

Source: RevenueBase Database · checked Sep 21, 2026
11Indirect evidenceLeeds, United KingdomHQ checked Sep 21, 202651-200116 contacts →

Indirect evidence

“We started out as a trailblazing boiler installation company in 2017 – the first to offer everything effortlessly online.”

Source: RevenueBase Database · checked Sep 21, 2026
12Partial evidenceEnfield, United KingdomHQ checked Sep 21, 2026201-500112 contacts →

Partial evidence

“As renewable energy technology experts, we have the knowledge and skills to help commercial clients switch to a greener, lower cost and more independent energy source.”

Source: RevenueBase Database · checked Sep 21, 2026
13Strong evidenceGlasgow, United KingdomHQ checked Sep 21, 202651-200111 contacts →

Strong evidence

“Smarter Grid Solutions is an enterprise energy software company with a unique end to end approach to Distributed Energy Resource Management Systems (DERMS) to deliver net zero…”

Source: RevenueBase Database · checked Sep 21, 2026
14Partial evidenceDoxford International Business Park, United KingdomHQ checked Sep 21, 202651-200106 contacts →

Partial evidence

“Managing business energy can be overwhelming.”

Source: RevenueBase Database · checked Sep 21, 2026
15Indirect evidenceLondon, United KingdomHQ checked Sep 21, 2026201-500100 contacts →

Indirect evidence

“Welcome to greener living, lower bills, and eco-tech that feels like home.”

Source: RevenueBase Database · checked Sep 21, 2026
16Partial evidenceLondon, United KingdomHQ checked Sep 21, 202651-20097 contacts →

Partial 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 21, 2026
17Partial evidenceWest Malling, United KingdomHQ checked Sep 21, 202651-20093 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 21, 2026
18Partial evidenceBristol, United KingdomHQ checked Sep 21, 2026201-50090 contacts →

Partial evidence

“We are a leading provider of retrofit residential decarbonisation across the UK.”

Source: RevenueBase Database · checked Sep 21, 2026
19Indirect evidenceLeicester, United KingdomHQ checked Sep 21, 202651-20088 contacts →

Indirect evidence

“Specialists in the installation of smart meters in domestic and business premises across the UK.”

Source: RevenueBase Database · checked Sep 21, 2026
20Partial evidenceMaidenhead, United KingdomHQ checked Sep 21, 202651-20079 contacts →

Partial evidence

“Fully funded solar solutions specialising in Commercial and Residential Solar with Battery.”

Source: RevenueBase Database · checked Sep 21, 2026
21Partial evidenceDoncaster, United KingdomHQ checked Sep 21, 2026201-50075 contacts →

Partial evidence

“Specialising in Smart Metering, Isolator Switch Installations & Renewable Energy Solutions Founded in 2018, Energise Energy has been working independently and alongside major…”

Source: RevenueBase Database · checked Sep 21, 2026
22Strong evidenceWallington, United KingdomHQ checked Sep 21, 202651-20061 contacts →

Strong evidence

“Services we provide: Fixed Energy Procurement Flexible Energy Procurement Building Management Carbon Solutions Waste Management Invoice Validation (Electricity, Gas, Water)…”

Source: RevenueBase Database · checked Sep 21, 2026
23Strong evidenceBury, United KingdomHQ checked Sep 21, 2026201-50060 contacts →

Strong evidence

“Who we are » The UK’s leading Energy Management company » Our aim is to increase energy performance within buildings » Deliver energy projects to maximise customer return on…”

Source: RevenueBase Database · checked Sep 21, 2026
24Indirect evidenceFareham, United KingdomHQ checked Sep 21, 202651-20060 contacts →

Indirect evidence

“Hello.”

Source: RevenueBase Database · checked Sep 21, 2026
25Partial evidenceBarking, United KingdomHQ checked Sep 21, 202651-20057 contacts →

Partial evidence

“IZ Energy is pioneering a sustainable future.”

Source: RevenueBase Database · checked Sep 21, 2026

Showing 25 of 659 residential energy management companies based in the United Kingdom

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Residential energy management companies based in the United Kingdom at a glance

As of Sep 21, 2026
33.8%Verified-email coverage
33.9Average contacts per company
1-10Median size (employees)
13.5%Largest-city concentration · London
Sep 21, 2026Page data refreshed

Companies by employee count

1-10
329
11-50
246
51-200
49
201-500
18
501-1,000
2
1,001-5,000
3
5,001-10,000
1
10001+
3

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 659 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 residential energy management 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 the United Kingdom whose own description of what they do matches “residential energy management 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 residential energy management 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 residential energy management companies, 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, 7,555 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 21, 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.

Residential energy management companies by metro

  • Residential energy management companies in London89

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 residential energy management companies, 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 residential energy management companies are there based in the United Kingdom?

RevenueBase identified 659 residential energy management companies 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 residential energy management companies?

London leads with 89 headquartered companies, followed by Manchester (18) and Bristol (12).

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 7,555 verified decision-maker contacts tracked across these 659 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 21, 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.