Company lists · Data verified August 2026

Top 25 Energy retailer software based in the United Kingdom

Name: Energy retailer software 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 200 companies tracked

There are 200 energy retailer software headquartered in the United Kingdom (RevenueBase, August 2026). RevenueBase tracks 20,323 professional contacts across them, including 7,175 with verified work emails and 832 with mobile numbers. London is the largest hub.

This list covers energy retailer software 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.

200Companies

20,323Contacts tracked

7,175Verified emails

832Mobile numbers

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The 25 largest energy retailer software based in the United Kingdom

Ranked by team size

Top 25 of 200 energy retailer software 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	British GAS	Staines	10001+	9,287	2,729
2	Centrica	Windsor	10001+	4,589	1,527
3	Calisen	Manchester	1,001-5,000	701	274
4	Kaluza	London	501-1,000	601	359
5	Terranova Software	Leamington Spa	201-500	363	254
6	Corona Energy	Coventry	51-200	330	188
7	Correla	Solihull	201-500	291	166
8	YU Energy	Leicester	51-200	278	103
9	Sureserve Energy Services Meters	Liverpool	201-500	237	129
10	YES Energy Demand Forecasts	London	201-500	198	5
11	Conrad Energy	Abingdon	51-200	172	118
12	Myenergi	Stallingborough	201-500	170	93
13	Brady Technologies	Edinburgh	51-200	144	3
14	Amt-Sybex	n/a	51-200	120	52
15	POWWR	Manchester	51-200	117	40
16	Crown GAS & Power	Manchester	51-200	113	66
17	Gorilla	London	51-200	107	84
18	OVO Energy LTD	Bristol	1,001-5,000	96	8
19	Valda Energy Limited	Bicester	51-200	92	60
20	GMSL	Cambridge	51-200	77	58
21	Senapt	Basingstoke	51-200	70	55
22	Flui Technologies	Wallingford	51-200	65	46
23	Utiligroup ESG	Chorley	201-500	59	44
24	Fidelity Energy LTD	Newbury	51-200	55	41
25	Methodia	London	51-200	53	23

Showing 25 of 200 energy retailer software based in the United Kingdom

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Energy retailer software based in the United Kingdom at a glance

As of Aug 28, 2026

11-50Median size (employees)

LondonLargest hub · 40 HQs

832Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

10001+

Energy retailer software by metro

Metro	Companies
Energy retailer software in London	40
Energy retailer software in Manchester	9
Energy retailer software in Cambridge	6
Energy retailer software in Newcastle Upon Tyne	5
Energy retailer software in Bolton	4
Energy retailer software in Leeds	4
Energy retailer software in Belfast	3

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 retailer software”, 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 retailer software are there based in the United Kingdom?

There are 200 energy retailer software headquartered in the United Kingdom as of August 2026 (RevenueBase).

What is the largest company on this list?

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

Which city has the most energy retailer software?

London leads with 40 headquartered companies, followed by Manchester (9) 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 7,175 verified decision-maker contacts tracked across these 200 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.