Company lists · Data refreshed September 2026

Top 25 Energy audit and analytics companies based in London, United Kingdom

Name: Energy audit and analytics companies based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 70 companies tracked

RevenueBase identified 70 energy audit and analytics companies headquartered in London, United Kingdom as of September 2026 and tracks 1,121 professional contacts across them, including 555 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers energy audit and analytics companies headquartered in London, 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

70Companies

1,121Contacts tracked

555Verified emails

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The 25 largest energy audit and analytics companies based in London, United Kingdom

Ranked by team size

Top 25 of 70 energy audit and analytics companies based in London, 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 audit and analytics 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 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
2	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
3	Faradai	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	39 contacts →
	Partial evidence “Faradai provides multi-agent AI & analytics platform to accelerate decarbonization.” Source: RevenueBase Database · checked Sep 28, 2026
4	Guru Systems LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	32 contacts →
	Partial evidence “Guru Systems creates intelligent technology to make energy systems more transparent, lower cost and lower carbon.” Source: RevenueBase Database · checked Sep 28, 2026
5	Octaipipe	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	25 contacts →
	Partial 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
6	Kestrix	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial evidence “Kestrix uses thermal imaging and AI to map and quantify how heat escapes from buildings, assess heat pump and solar readiness, and generate energy retrofit plans – for more…” Source: RevenueBase Database · checked Sep 28, 2026
7	Smartviz	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “SmartViz ‘s AI-powered building analytics puts people at centre of decision making.” Source: RevenueBase Database · checked Sep 28, 2026
8	Voltaware	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	16 contacts →
	Indirect evidence “Voltaware is a start-up electricity monitoring company based in London.” Source: RevenueBase Database · checked Sep 28, 2026
9	The OAK Network	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “OAK Network digitally transforms the way businesses manage and control their energy consumption.” Source: RevenueBase Database · checked Sep 28, 2026
10	Optima Energy	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “Our advanced, automated technology delivers energy and sustainability data that sets new standards for Environmental, Social and Governance (ESG) reporting.” Source: RevenueBase Database · checked Sep 28, 2026
11	CAP Energy	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	12 contacts →
	Partial evidence “Cap Energy installs bespoke, accessible energy monitors at a site & appliance level and provides incredible data on power usage.” Source: RevenueBase Database · checked Sep 28, 2026
12	Orxagrid LTD	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	11 contacts →
	Strong evidence “Energy optimisation analytics that improve energy efficiency, optimise assets and prevent faults” Source: RevenueBase Database · checked Sep 28, 2026
13	Quantaco	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Our mission is to break down data silos in the built environment to accelerate decarbonisation and support organisations in making the right investment decisions.” Source: RevenueBase Database · checked Sep 28, 2026
14	Building Atlas	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “Building Atlas uses data and AI to plan your fastest, cheapest path to net zero across large portfolios of commercial real estate.” Source: RevenueBase Database · checked Sep 28, 2026
15	Meterz	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	6 contacts →
	Partial evidence “MeterZ removes barriers to collecting and analysing building energy data.” Source: RevenueBase Database · checked Sep 28, 2026
16	Voltview	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Empowering UK businesses through data, transparency, and open energy.” Source: RevenueBase Database · checked Sep 28, 2026
17	Co2 Controls LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Our goal is to optimise energy use and reduce operating costs - helping you achieve your business and environmental goals.” Source: RevenueBase Database · checked Sep 28, 2026
18	Focus Green	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Strong evidence “Focus Green provides simple and easy-to-understand energy audits and carbon reduction plans.” Source: RevenueBase Database · checked Sep 28, 2026
19	Carbonanalytics	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “CarbonAnalytics \| AI-Enhanced Carbon Accounting Platform* Most sustainability teams with limited budgets spend 80% of their time chasing data instead of driving strategy.” Source: RevenueBase Database · checked Sep 28, 2026
20	VRM Tech	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	4 contacts →
	Partial evidence “VRM Tech is a software firm that helps building stock owners to monitor, optimise and significantly reduce energy costs, carbon emissions and improve the health of their buildings.” Source: RevenueBase Database · checked Sep 28, 2026
21	Propcode LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “Measure.” Source: RevenueBase Database · checked Sep 28, 2026
22	Packaged Insight	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “Driving Sustainability Through Data-Led Solutions Packaged Insight is a powerful, cloud-based platform designed to help organisations drive sustainability, boost efficiency, and…” Source: RevenueBase Database · checked Sep 28, 2026
23	Pa-Energy	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	2 contacts →
	Strong evidence “PA-Energy provide building + sites water, energy and renewables metering and automated monitoring, environmental analytics reporting, independent technical expert consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
24	Resourcematics Limited	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “Resourcematics provides data and analytical services on Energy, Water and Agriculture.” Source: RevenueBase Database · checked Sep 28, 2026
25	Io-Gen	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “IO-Gen offers a smart and complete energy efficiency solution to your business operations, by leveraging the power of technology and information, our core services are entirely…” 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 audit and analytics 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 audit and analytics companies.
Partial evidence: Its own public description names part of energy audit and analytics companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy audit and analytics 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 70 energy audit and analytics companies based in London, United Kingdom

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Energy audit and analytics companies based in London, United Kingdom at a glance

As of Sep 28, 2026

49.5%Verified-email coverage

16.0Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 70 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 audit and analytics 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 London, United Kingdom whose own description of what they do matches “energy audit and analytics 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 audit and analytics 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 audit and analytics companies, and records with no verified work email. Companies headquartered outside London 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, 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 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.

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 audit and analytics 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 audit and analytics companies are there based in London, United Kingdom?

RevenueBase identified 70 energy audit and analytics companies headquartered in London, 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 in the United Kingdom has the most energy audit and analytics companies?

London leads the United Kingdom with 70 headquartered companies, followed by Manchester (8) and Bristol (7).

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 555 verified decision-maker contacts tracked across these 70 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.