Company lists · Data refreshed September 2026

Top 25 Climate tech software companies based in London, United Kingdom

Name: Climate tech software 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 8, 2026 169 companies tracked

RevenueBase identified 169 climate tech software companies headquartered in London, United Kingdom as of September 2026 and tracks 10,936 professional contacts across them, including 4,788 with verified work emails and 1,290 with mobile numbers. London is the largest hub.

This list covers climate tech software 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 8, 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 8, 2026 86% judged on-target in blind review

169Companies

10,936Contacts tracked

4,788Verified emails

1,290Mobile numbers

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The 25 largest climate tech software companies based in London, United Kingdom

Ranked by team size

Top 25 of 169 climate tech software companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 8, 2026. RevenueBase Smart Search rates how each company's information relates to climate tech 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	Anthesis Group	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	1,001-5,000	894 contacts →
	Indirect evidence “Anthesis guides clients to sustainable performance.” Source: RevenueBase Database · checked Sep 8, 2026
2	Carbon Clean	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	188 contacts →
	Indirect evidence “Carbon Clean is the point-source carbon capture expert, driving the decarbonisation of hard-to-abate industries for more than 15 years.” Source: RevenueBase Database · checked Sep 8, 2026
3	Updapt	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	123 contacts →
	Indirect evidence “We are a new age technology driven company, providing comprehensive SaaS based ESG (Environmental, Social & Governance) solutions to address end to end sustainability needs of…” Source: RevenueBase Database · checked Sep 8, 2026
4	Ecolibrium	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	109 contacts →
	Partial evidence “Ecolibrium is a sustainability tech company that empowers people to make better decisions based on proven data-driven ML algorithms through continuous monitoring, analysis and…” Source: RevenueBase Database · checked Sep 8, 2026
5	Alfa Energy An Edison Energy Company	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	201-500	88 contacts →
	Indirect evidence “Alfa Energy Group (an Edison Energy company) is an international energy, sustainability and technology consultant partner with 200 employees over four international locations.” Source: RevenueBase Database · checked Sep 8, 2026
6	Ecoact Part Of Schneider Electric	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	201-500	69 contacts →
	Indirect evidence “EcoAct is now SE Advisory Services.” Source: RevenueBase Database · checked Sep 8, 2026
7	Arenko	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	68 contacts →
	Indirect evidence “Arenko is a market leading technology provider enabling the clean energy transition.” Source: RevenueBase Database · checked Sep 8, 2026
8	Pacific Green	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	63 contacts →
	Partial evidence “Pacific Green is becoming a world leader at providing sustainable cleantech solutions to help solve climate warming, green energy and resource scarcity challenges.” Source: RevenueBase Database · checked Sep 8, 2026
9	Climate Connect Digital	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	63 contacts →
	Strong evidence “Climate Connect Digital (CCD) is a climate-tech company with Digital Monitoring Reporting Verification products in carbon markets.” Source: RevenueBase Database · checked Sep 8, 2026
10	Transitionzero	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	47 contacts →
	Strong evidence “TransitionZero is a climate tech non-profit founded in 2021.” Source: RevenueBase Database · checked Sep 8, 2026
11	Zevero	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	51-200	45 contacts →
	Indirect evidence “Zevero is a leading carbon management platform that empowers organisations to measure, reduce, and report their carbon emissions with precision and efficiency.” Source: RevenueBase Database · checked Sep 8, 2026
12	Carbonchain	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	42 contacts →
	Indirect evidence “CarbonChain's platform enables companies to track, report and reduce their supply chain emissions, covering the most carbon-intensive industries (metals and mining, agriculture…” Source: RevenueBase Database · checked Sep 8, 2026
13	Karbonwise	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	42 contacts →
	Partial evidence “KarbonWise is a sustainability solutions company that helps businesses take climate action with confidence and clarity.” Source: RevenueBase Database · checked Sep 8, 2026
14	Climate Policy Radar	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	38 contacts →
	Partial evidence “Climate Policy Radar builds the shared data infrastructure that turns fragmented government documents into reliable, actionable evidence.” Source: RevenueBase Database · checked Sep 8, 2026
15	Angara Global LTD UK	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	33 contacts →
	Indirect evidence “ANGARA turns $100 billion of invisible fouling losses into measurable profit through Proactive Fouling Management in industrial heat transfer with paired AI analytics and patented…” Source: RevenueBase Database · checked Sep 8, 2026
16	Minimum	Partial evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	29 contacts →
	Partial evidence “Minimum is the leading carbon accounting software for enterprise companies.” Source: RevenueBase Database · checked Sep 8, 2026
17	Carbonquota	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	24 contacts →
	Indirect evidence “We are trusted experts in carbon measurement and reduction, specialising in packaging and print manufacturing, media and logistics sectors.” Source: RevenueBase Database · checked Sep 8, 2026
18	Alliedoffsets	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	23 contacts →
	Indirect evidence “AlliedOffsets is the world’s largest database and market intelligence provider for the voluntary carbon market.” Source: RevenueBase Database · checked Sep 8, 2026
19	Ditchcarbon	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	22 contacts →
	Indirect evidence “As the first company to earn verification from UL Solutions, we are the recognised leader in Scope 3 measurement and reduction.” Source: RevenueBase Database · checked Sep 8, 2026
20	Finboot	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	22 contacts →
	Indirect evidence “Finboot’s technology provides green supply chain management for the world's largest capital-intensive manufacturing companies.” Source: RevenueBase Database · checked Sep 8, 2026
21	Greenpixie	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	21 contacts →
	Indirect evidence “Greenpixie delivers highly granular, auditable data on cloud and AI usage, breaking down emissions, energy, and cost by service, region, and resource.” Source: RevenueBase Database · checked Sep 8, 2026
22	Alectro	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	1-10	20 contacts →
	Indirect evidence “Your Net Zero Journey, Simplified on One Platform.” Source: RevenueBase Database · checked Sep 8, 2026
23	TEWKE	Strong evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	18 contacts →
	Strong evidence “Tewke is a London-based climate-tech company reengineering the relationship between people, their homes and the energy grid.” Source: RevenueBase Database · checked Sep 8, 2026
24	Kestrix	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	17 contacts →
	Indirect 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 8, 2026
25	KEY ESG	Indirect evidence	London, United KingdomHQ checked Sep 8, 2026	11-50	17 contacts →
	Indirect evidence “KEY ESG is the platform where sustainability teams and their business colleagues collect, validate, analyse, and report ESG data in one place and connect it to the decisions that…” Source: RevenueBase Database · checked Sep 8, 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: climate tech 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 climate tech software companies.
Partial evidence: Its own public description names part of climate tech software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name climate tech 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 169 climate tech software companies based in London, United Kingdom

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Climate tech software companies based in London, United Kingdom at a glance

As of Sep 8, 2026

43.8%Verified-email coverage

11.8%Mobile-number coverage

64.7Average contacts per company

1-10Median size (employees)

113.0%Largest-city concentration · London

Sep 8, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

4,3670–30

30831–60

261–90

190–180

110180+

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 climate tech 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 London, United Kingdom whose own description of what they do matches “climate tech 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 climate tech 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 climate tech software 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, 4,788 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 8, 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.

Climate tech software companies by metro in the United Kingdom

Climate tech software companies in London191

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 climate tech 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 climate tech software companies are there based in London, United Kingdom?

RevenueBase identified 169 climate tech software 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?

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

Which city has the most climate tech software companies?

London leads with 191 headquartered companies, followed by Edinburgh (11) and Cambridge (9).

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 4,788 verified decision-maker contacts tracked across these 169 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 8, 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.