Company lists · Data refreshed September 2026

Top 25 Energy efficiency software companies based in the United Kingdom

Name: Energy efficiency software 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 2, 2026 369 companies tracked

RevenueBase identified 369 energy efficiency software companies headquartered in the United Kingdom as of September 2026 and tracks 13,640 professional contacts across them, including 4,674 with verified work emails and 531 with mobile numbers. London is the largest hub.

This list covers energy efficiency software 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 2, 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 RevenueBase Smart Search rating on every row Refreshed Sep 2, 2026 86% judged on-target in blind review

369Companies

13,640Contacts tracked

4,674Verified emails

531Mobile numbers

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

Ranked by team size

Top 25 of 369 energy efficiency software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 2, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency software 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kaluza	Partial evidence	London, United Kingdom	501-1,000	601 contacts →
	Partial evidence “Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination.” Source: RevenueBase Database · checked Sep 2, 2026
2	Correla	Indirect evidence	Solihull, United Kingdom	201-500	291 contacts →
	Indirect evidence “Correla exists because we dream of a simpler, greener society powered by our investment in innovation and our passion for customers.” Source: RevenueBase Database · checked Sep 2, 2026
3	E.On Control Solutions LTD	Partial evidence	United Kingdom	201-500	205 contacts →
	Partial 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 2, 2026
4	Learnd	Partial evidence	Clerkenwell, United Kingdom	201-500	200 contacts →
	Partial evidence “learnd was founded in 2020 to disrupt the way buildings operate by providing energy and cost savings at scale - we call this the Power of Many.” Source: RevenueBase Database · checked Sep 2, 2026
5	Amt-Sybex	Partial evidence	United Kingdom	51-200	120 contacts →
	Partial evidence “AMT-SYBEX has worked in the infrastructure and energy industries since 1990, witnessing many changes; from privatisation to deregulation, to smart energy and beyond.” Source: RevenueBase Database · checked Sep 2, 2026
6	Trend Control Systems	Partial evidence	Horsham, United Kingdom	501-1,000	113 contacts →
	Partial evidence “Trend is one of the world's leading Building Energy Management Systems manufacturers, with a worldwide distribution and support network covering over 50 countries.” Source: RevenueBase Database · checked Sep 2, 2026
7	Gorilla	Indirect evidence	London, United Kingdom	51-200	107 contacts →
	Indirect evidence “Hi there, we are Gorilla.” Source: RevenueBase Database · checked Sep 2, 2026
8	best.energy	Partial evidence	London, United Kingdom	51-200	97 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 2, 2026
9	Team Energy Auditing Agency LTD	Strong evidence	Milton Keynes, United Kingdom	51-200	70 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 2, 2026
10	Matrix Control Solutions LTD	Partial evidence	Glasgow, United Kingdom	201-500	61 contacts →
	Partial 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 2, 2026
11	Energy Drive	Strong evidence	London, United Kingdom	51-200	59 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 2, 2026
12	Forest Rock	Indirect evidence	Loughborough, United Kingdom	51-200	57 contacts →
	Indirect evidence “Forest Rock: Your Full-Stack IoT Solution Partner Forest Rock is a leading provider of innovative IoT and building management solutions.” Source: RevenueBase Database · checked Sep 2, 2026
13	Powerverse	Partial evidence	London, United Kingdom	11-50	52 contacts →
	Partial evidence “Powerverse is a smart energy management company committed to creating a more affordable, connected electric future.” Source: RevenueBase Database · checked Sep 2, 2026
14	Fusion For Business	Indirect evidence	Durham, United Kingdom	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 2, 2026
15	UTOPI	Indirect evidence	Glasgow, United Kingdom	51-200	49 contacts →
	Indirect evidence “Building performance made simple.” Source: RevenueBase Database · checked Sep 2, 2026
16	Gridedge	Indirect evidence	Birmingham, United Kingdom	11-50	41 contacts →
	Indirect evidence “Your buildings are running 24/7, making decisions you can't see.” Source: RevenueBase Database · checked Sep 2, 2026
17	Joulen	Partial evidence	Belfast, United Kingdom	11-50	38 contacts →
	Partial evidence “Joulen is a leading provider of flexible energy services, based in Belfast, Northern Ireland.” Source: RevenueBase Database · checked Sep 2, 2026
18	HARK	Partial evidence	Leeds, United Kingdom	11-50	34 contacts →
	Partial evidence “Hark is an award-winning Energy Analytics and Industrial IoT company based in Leeds.” Source: RevenueBase Database · checked Sep 2, 2026
19	Smartwatt	Partial evidence	Tunbridge Wells, United Kingdom	11-50	28 contacts →
	Partial evidence “A Smartwatt, com mais de 15 anos de experiência, cria e implementa soluções de eficiência energética, produção de energia renovável e digitalização da gestão da energia…” Source: RevenueBase Database · checked Sep 2, 2026
20	Utilidex	Strong evidence	London, United Kingdom	11-50	28 contacts →
	Strong evidence “Utilidex delivers a range of integrated energy software products supporting end customers, consultants and energy suppliers/generators for data management, billing, trading…” Source: RevenueBase Database · checked Sep 2, 2026
21	Arbnco	Indirect evidence	Glasgow, United Kingdom	51-200	26 contacts →
	Indirect evidence “We’re a multi, award-winning PropTech company addressing one of the defining challenges of our time: climate change.” Source: RevenueBase Database · checked Sep 2, 2026
22	Laplace Solutions LTD	Indirect evidence	Reading, United Kingdom	51-200	26 contacts →
	Indirect evidence “About Us Laplace Solutions has a history stretching back to 1976, when we sold instrumentation products to a variety of industries.” Source: RevenueBase Database · checked Sep 2, 2026
23	Systemslink	Partial evidence	Bedford, United Kingdom	51-200	25 contacts →
	Partial evidence “The UK’s industry-leading utilities, carbon and analytics management software provider.” Source: RevenueBase Database · checked Sep 2, 2026
24	Demand Logic	Indirect evidence	London, United Kingdom	11-50	25 contacts →
	Indirect evidence “Demand Logic is a multi-award winning building optimisation platform which provides live data intelligence on how a building operates.” Source: RevenueBase Database · checked Sep 2, 2026
25	Making Energy Greener	Partial evidence	Southport, United Kingdom	51-200	21 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 2, 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: energy efficiency software companies. 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 energy efficiency software companies.
Partial evidence: Its own public description names part of energy efficiency software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency software companies. 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 369 energy efficiency software companies based in the United Kingdom

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

As of Sep 2, 2026

34.3%Verified-email coverage

3.9%Mobile-number coverage

37.0Average contacts per company

1-10Median size (employees)

24.9%Largest-city concentration · London

Sep 2, 2026Page data refreshed

Companies by employee count

1-10

189

11-50

130

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

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 energy efficiency software 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 “energy efficiency software 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 energy efficiency software 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 energy efficiency software 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, 4,674 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 2, 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.

Energy efficiency software companies by metro

Energy efficiency software companies in London92

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 energy efficiency software 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 energy efficiency software companies are there based in the United Kingdom?

RevenueBase identified 369 energy efficiency software 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?

Kaluza, headquartered in London, tops this list with the largest team on record.

Which city has the most energy efficiency software companies?

London leads with 92 headquartered companies, followed by Manchester (12) and Belfast (8).

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 4,674 verified decision-maker contacts tracked across these 369 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 2, 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.