Company lists · Data verified August 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 Verified Aug 28, 2026 369 companies tracked

There are 369 energy efficiency software companies headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Kaluza	London	501-1,000	601	359
2	Correla	Solihull	201-500	291	166
3	E.On Control Solutions LTD	n/a	201-500	205	146
4	Learnd	Clerkenwell	201-500	200	134
5	Amt-Sybex	n/a	51-200	120	52
6	Trend Control Systems	Horsham	501-1,000	113	35
7	Gorilla	London	51-200	107	84
8	best.energy	London	51-200	97	43
9	Team Energy Auditing Agency LTD	Milton Keynes	51-200	70	31
10	Matrix Control Solutions LTD	Glasgow	201-500	61	30
11	Energy Drive	London	51-200	59	19
12	Forest Rock	Loughborough	51-200	57	35
13	Powerverse	London	11-50	52	26
14	Fusion For Business	Durham	51-200	49	34
15	UTOPI	Glasgow	51-200	49	32
16	Gridedge	Birmingham	11-50	41	8
17	Joulen	Belfast	11-50	38	28
18	HARK	Leeds	11-50	34	28
19	Smartwatt	Tunbridge Wells	11-50	28	15
20	Utilidex	London	11-50	28	13
21	Arbnco	Glasgow	51-200	26	21
22	Laplace Solutions LTD	Reading	51-200	26	12
23	Systemslink	Bedford	51-200	25	20
24	Demand Logic	London	11-50	25	10
25	Making Energy Greener	Southport	51-200	21	14

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 Aug 28, 2026

1-10Median size (employees)

LondonLargest hub · 92 HQs

531Contacts with mobile numbers

0Emails re-verified in last 30 days

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

Energy efficiency software companies by metro

Metro	Companies
Energy efficiency software companies in London	92
Energy efficiency software companies in Manchester	12
Energy efficiency software companies in Belfast	8
Energy efficiency software companies in Cambridge	8
Energy efficiency software companies in Glasgow	6
Energy efficiency software companies in Birmingham	5
Energy efficiency software companies in Worcester	4

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “energy efficiency software companies”, with match quality audited by blind human judging, and headquartered in the United Kingdom.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

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

There are 369 energy efficiency software companies headquartered in the United Kingdom as of August 2026 (RevenueBase).

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 is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.