Company lists · Data refreshed September 2026

Top 25 Sustainability software companies based in London, United Kingdom

Name: Sustainability 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 13, 2026 197 companies tracked

RevenueBase identified 197 sustainability software companies headquartered in London, United Kingdom as of September 2026 and tracks 12,649 professional contacts across them, including 6,279 with verified work emails and 2,073 with mobile numbers. London is the largest hub.

This list covers sustainability 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 13, 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 13, 2026 86% judged on-target in blind review

197Companies

12,649Contacts tracked

6,279Verified emails

2,073Mobile numbers

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The 25 largest sustainability software companies based in London, United Kingdom

Ranked by team size

Top 25 of 197 sustainability software companies based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to sustainability 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	ERM	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	5,001-10,000	9,119 contacts →
	Partial evidence “Sustainability is our business.” Source: RevenueBase Database · checked Sep 13, 2026
2	Ecoonline	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	501-1,000	620 contacts →
	Partial evidence “EcoOnline delivers uncomplicated environment, health and safety (EHS), chemical management and ESG/sustainability technology solutions to forward-thinking leaders.” Source: RevenueBase Database · checked Sep 13, 2026
3	SEDEX	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	427 contacts →
	Partial evidence “Sedex is a global technology company that specialises in data, insights and professional services to empower supply chain sustainability.” Source: RevenueBase Database · checked Sep 13, 2026
4	ESG Book	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	212 contacts →
	Indirect evidence “ESG Book and EthiFinance have merged!” Source: RevenueBase Database · checked Sep 13, 2026
5	ACRE	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	158 contacts →
	Partial evidence “Acre is the global market leader for sustainability executive search and recruitment services, exclusively focused on integrating sustainability and catalysing positive change…” Source: RevenueBase Database · checked Sep 13, 2026
6	Evora Global	Strong evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	148 contacts →
	Strong evidence “EVORA is an award-winning global sustainability consultancy and software provider supporting real asset investors, owners, and operators.” Source: RevenueBase Database · checked Sep 13, 2026
7	Updapt	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	123 contacts →
	Partial 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 13, 2026
8	ZTP	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	115 contacts →
	Indirect evidence “At ZTP, we’re committed to accelerating the transition to a more sustainable future by reducing the negative impact of human activity on our planet - ecologically, financially…” Source: RevenueBase Database · checked Sep 13, 2026
9	Ecolibrium	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
10	Alfa Energy An Edison Energy Company	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	88 contacts →
	Partial 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 13, 2026
11	FLAG	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	84 contacts →
	Partial evidence “We're a global sustainability agency, providing strategy, communications and reporting support to the world’s leading brands.” Source: RevenueBase Database · checked Sep 13, 2026
12	Altruistiq	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	83 contacts →
	Partial evidence “Altruistiq is a leading Sustainability Intelligence platform trusted by companies across the agriculture value chain.” Source: RevenueBase Database · checked Sep 13, 2026
13	Ecoact Part Of Schneider Electric	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	69 contacts →
	Indirect evidence “EcoAct is now SE Advisory Services.” Source: RevenueBase Database · checked Sep 13, 2026
14	Action Sustainability	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	62 contacts →
	Partial evidence “Recognised for its commitment to employees with a sought-after Best Companies “One To Watch” industry standard, Action Sustainability offers a 3-in-1 solution through…” Source: RevenueBase Database · checked Sep 13, 2026
15	Zevero	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
16	Minviro	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	43 contacts →
	Partial evidence “Minviro is a global leader in Life Cycle Assessment (LCA) services, offering software, consultancy, research, and database solutions to companies driving the energy transition.” Source: RevenueBase Database · checked Sep 13, 2026
17	Eight Versa	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	42 contacts →
	Indirect evidence “At Eight Versa, we deliver a new direction for a balanced future.” Source: RevenueBase Database · checked Sep 13, 2026
18	Carbonchain	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
19	Karbonwise	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
20	Natcap	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	35 contacts →
	Indirect evidence “Natcap is the world's leading nature intelligence provider, helping global companies measure, report, and act on nature and biodiversity risks and opportunities.” Source: RevenueBase Database · checked Sep 13, 2026
21	Ikano Insight	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	33 contacts →
	Indirect evidence “Ikano Insight helps businesses turn ambition into action.” Source: RevenueBase Database · checked Sep 13, 2026
22	Minimum	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	29 contacts →
	Partial evidence “Minimum is the leading carbon accounting software for enterprise companies.” Source: RevenueBase Database · checked Sep 13, 2026
23	SB CO	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	27 contacts →
	Partial evidence “SB+CO is a sustainability consultancy that advises companies on strategy, sustainability activation and integration, ESG, stakeholder engagement and communications – and…” Source: RevenueBase Database · checked Sep 13, 2026
24	Canbury	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	24 contacts →
	Partial evidence “We use the latest technologies to provide our clients with a full service of sustainability support - from source data through to client reporting.” Source: RevenueBase Database · checked Sep 13, 2026
25	Carbonquota	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 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: sustainability 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 sustainability software companies.
Partial evidence: Its own public description names part of sustainability software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name sustainability 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 197 sustainability software companies based in London, United Kingdom

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Sustainability software companies based in London, United Kingdom at a glance

As of Sep 13, 2026

49.6%Verified-email coverage

16.4%Mobile-number coverage

64.2Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · London

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

121

11-50

51-200

201-500

501-1,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 15.0d

5,0180–30

1,18631–60

2961–90

090–180

46180+

Company record updated

Median 63.5d

00–30

6,01731–60

4,88961–90

1,13490–180

609180+

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 sustainability 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 “sustainability 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 sustainability 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 sustainability 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, 6,279 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 13, 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.

Sustainability software companies by metro in the United Kingdom

Sustainability software companies in London197

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 sustainability 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 sustainability software companies are there based in London, United Kingdom?

RevenueBase identified 197 sustainability 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?

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

Which city has the most sustainability software companies?

London leads with 197 headquartered companies, followed by Manchester (21) and Edinburgh (11).

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 6,279 verified decision-maker contacts tracked across these 197 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 13, 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.