Company lists · Data refreshed September 2026

Top 25 Energy optimization software companies based in the United Kingdom

Name: Energy optimization 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 28, 2026 247 companies tracked

RevenueBase identified 247 energy optimization software companies headquartered in the United Kingdom as of September 2026 and tracks 12,858 professional contacts across them, including 4,449 with verified work emails. London is the largest hub.

This list covers energy optimization 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 28, 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 28, 2026 86% judged on-target in blind review

247Companies

12,858Contacts tracked

4,449Verified emails

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

Ranked by team size

Top 25 of 247 energy optimization software companies based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to energy optimization 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	British GAS	Indirect evidence	Windsor, United KingdomHQ checked Sep 28, 2026	10001+	9,238 contacts →
	Indirect evidence “Taking care of things.” Source: RevenueBase Database · checked Sep 28, 2026
2	KBC A Yokogawa Company	Indirect evidence	Walton-on-thames, United KingdomHQ checked Sep 28, 2026	201-500	658 contacts →
	Indirect evidence “We are passionate about driving sustainable change for our planet.” Source: RevenueBase Database · checked Sep 28, 2026
3	Kaluza	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	501-1,000	595 contacts →
	Partial evidence “Kaluza is the Energy Intelligence Platform, turning energy complexity into seamless coordination.” Source: RevenueBase Database · checked Sep 28, 2026
4	Correla	Indirect evidence	Solihull, United KingdomHQ checked Sep 28, 2026	201-500	293 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 28, 2026
5	E.On Control Solutions LTD	Partial evidence	Bury, United KingdomHQ checked Sep 28, 2026	201-500	206 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 28, 2026
6	Amt-Sybex	Partial evidence	Oxfordshire, United KingdomHQ checked Sep 28, 2026	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 28, 2026
7	best.energy	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	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 28, 2026
8	Team Energy Auditing Agency LTD	Partial evidence	Milton Keynes, United KingdomHQ checked Sep 28, 2026	51-200	69 contacts →
	Partial 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 28, 2026
9	Powerverse	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	50 contacts →
	Partial evidence “Powerverse is a smart energy management company committed to creating a more affordable, connected electric future.” Source: RevenueBase Database · checked Sep 28, 2026
10	Fusion For Business	Indirect evidence	Durham, United KingdomHQ checked Sep 28, 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 28, 2026
11	ECBS	Indirect evidence	Hebburn, United KingdomHQ checked Sep 28, 2026	51-200	48 contacts →
	Indirect evidence “At ECBS we specialise in working with customers to significantly reduce their business utility costs and make the necessary steps towards a greener future.” Source: RevenueBase Database · checked Sep 28, 2026
12	Gridedge	Indirect evidence	Birmingham, United KingdomHQ checked Sep 28, 2026	11-50	41 contacts →
	Indirect evidence “Your buildings are running 24/7, making decisions you can't see.” Source: RevenueBase Database · checked Sep 28, 2026
13	Joulen	Partial evidence	Belfast, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Partial evidence “Joulen is a leading provider of flexible energy services, based in Belfast, Northern Ireland.” Source: RevenueBase Database · checked Sep 28, 2026
14	Chameleon Technology UK LTD	Indirect evidence	Harrogate, United KingdomHQ checked Sep 28, 2026	11-50	37 contacts →
	Indirect evidence “Chameleon Technology is a visionary smart technology solutions company, pioneering smart devices since 2010.” Source: RevenueBase Database · checked Sep 28, 2026
15	HARK	Partial evidence	Leeds, United KingdomHQ checked Sep 28, 2026	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 28, 2026
16	Designbuilder Software	Strong evidence	Stroud, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Strong evidence “DesignBuilder is a state-of-the-art software tool for checking building energy, carbon, lighting and comfort performance.” Source: RevenueBase Database · checked Sep 28, 2026
17	MPL Technology Group	Partial evidence	Bicester, United KingdomHQ checked Sep 28, 2026	11-50	31 contacts →
	Partial evidence “At MPL, we define an Estate as the full network of client facilities contributing to overall energy use.” Source: RevenueBase Database · checked Sep 28, 2026
18	Systemslink	Partial evidence	Bedford, United KingdomHQ checked Sep 28, 2026	51-200	28 contacts →
	Partial evidence “The UK’s industry-leading utilities, carbon and analytics management software provider.” Source: RevenueBase Database · checked Sep 28, 2026
19	Utilidex	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	26 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 28, 2026
20	Integrated BMS LTD	Partial evidence	Newark, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial evidence “Integrated BMS specialise in providing Energy Management Systems for the built environment.” Source: RevenueBase Database · checked Sep 28, 2026
21	Octaipipe	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Strong evidence “OctaiPipe is an AI-powered optimisation software solution that delivers up to 30% savings in cooling energy use with zero disruption.” Source: RevenueBase Database · checked Sep 28, 2026
22	Demand Logic	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	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 28, 2026
23	Beespace	Indirect evidence	Belfast, United KingdomHQ checked Sep 28, 2026	1-10	18 contacts →
	Indirect evidence “Clear insights, smarter spaces.” Source: RevenueBase Database · checked Sep 28, 2026
24	Powerhub Solutions	Partial evidence	Stockport, United KingdomHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial evidence “At Powerhub Solutions, we help businesses cut energy waste, lower costs, and reduce carbon, without compromising performance or guest experience.” Source: RevenueBase Database · checked Sep 28, 2026
25	RMS Energy Solutions	Partial evidence	Coventry, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “Providing domestic energy efficiency solutions to save our customers money and save the environment.” Source: RevenueBase Database · checked Sep 28, 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 optimization 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 optimization software companies.
Partial evidence: Its own public description names part of energy optimization 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 optimization 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 247 energy optimization software companies based in the United Kingdom

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

As of Sep 28, 2026

34.6%Verified-email coverage

52.1Average contacts per company

1-10Median size (employees)

24.7%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

139

11-50

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 247 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 energy optimization 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 optimization 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 optimization 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 optimization 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, 4,449 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 28, 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 optimization software companies by metro

Energy optimization software companies in London61

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 optimization 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 optimization software companies are there based in the United Kingdom?

RevenueBase identified 247 energy optimization 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?

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

Which city has the most energy optimization software companies?

London leads with 61 headquartered companies, followed by Manchester (13) and Cambridge (6).

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 4,449 verified decision-maker contacts tracked across these 247 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 28, 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.