Company lists · Data refreshed September 2026

Top 25 Esg compliance consulting firms based in London, United Kingdom

Name: Esg compliance consulting firms 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 248 companies tracked

RevenueBase identified 248 esg compliance consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 1,589 professional contacts across them, including 627 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers esg compliance consulting firms 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

248Companies

1,589Contacts tracked

627Verified emails

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The 25 largest esg compliance consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 248 esg compliance consulting firms 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 esg compliance consulting firms: 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	Holtara An Apex Group Company	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	100 contacts →
	Indirect evidence “Our mission is to positively impact businesses today, for a sustainable tomorrow.” Source: RevenueBase Database · checked Sep 28, 2026
2	ERM CVS	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	100 contacts →
	Indirect evidence “ERM CVS provides science-based, independent assurance, verification certification and training services for the world’s leading organizations.” Source: RevenueBase Database · checked Sep 28, 2026
3	Hudson Sandler	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	67 contacts →
	Partial evidence “We are an independent strategic communications and ESG consultancy headquartered in London.” Source: RevenueBase Database · checked Sep 28, 2026
4	Eight Versa	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	42 contacts →
	Indirect evidence “At Eight Versa, we deliver a new direction for a balanced future.” Source: RevenueBase Database · checked Sep 28, 2026
5	Earth Active LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	39 contacts →
	Partial evidence “Earth Active is an award-winning consultancy with a globally experienced team of bespoke ESG advisors and expert specialists that provide investment and risk due diligence in…” Source: RevenueBase Database · checked Sep 28, 2026
6	AIS Consulting	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	39 contacts →
	Indirect evidence “Growing organisations don't outgrow spreadsheets overnight.” Source: RevenueBase Database · checked Sep 28, 2026
7	Lysis Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	38 contacts →
	Partial evidence “Since 2001, Lysis Group has established itself as a global leader in the field of Financial Crime (FC) compliance.” Source: RevenueBase Database · checked Sep 28, 2026
8	Complyport	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	36 contacts →
	Indirect evidence “Welcome to Complyport - member of ComplyMAP Group!” Source: RevenueBase Database · checked Sep 28, 2026
9	RQC Group	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Strong evidence “RQC Group is an industry-leading financial compliance consultancy with offices in London and New York, specialising in FCA, SEC and CFTC/NFA Compliance Consulting, Investment…” Source: RevenueBase Database · checked Sep 28, 2026
10	Robertsbridge	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “Robertsbridge advises major companies as they navigate the increasingly complex intersection of sustainability, climate, nature, and geopolitics.” Source: RevenueBase Database · checked Sep 28, 2026
11	SB CO	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
12	Translantic Development LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	26 contacts →
	Indirect evidence “Translantic Development Limited (TDL) is a leading Environmental and Social Governance service provider, with a strong focus on Social Performance, helping development projects…” Source: RevenueBase Database · checked Sep 28, 2026
13	Avyse Partners	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Strong evidence “Purpose led regulatory consultants specialising in financial crime prevention, conduct, compliance and ESG.” Source: RevenueBase Database · checked Sep 28, 2026
14	Pirc Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “Pensions & Investment Research Consultants Ltd (PIRC) is Europe’s largest independent corporate governance and shareholder advisory consultancy with over 25 years experience in…” Source: RevenueBase Database · checked Sep 28, 2026
15	Sancroft	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “Sancroft is an award-winning sustainability consultancy based in London.” Source: RevenueBase Database · checked Sep 28, 2026
16	Kumi Consulting LTD	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	21 contacts →
	Indirect evidence “At Kumi we connect global raw material supply chains with responsible business practices in developing countries.” Source: RevenueBase Database · checked Sep 28, 2026
17	Addidat	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Partial evidence “With our outsourced ESG service, Addidat makes ESG easy for UK growth companies and their investors, enabling businesses to thrive.” Source: RevenueBase Database · checked Sep 28, 2026
18	ERM Previously ESC	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	20 contacts →
	Indirect evidence “This page has closed” Source: RevenueBase Database · checked Sep 28, 2026
19	Trucost	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	19 contacts →
	Indirect evidence “Trucost is part of S&P Global.” Source: RevenueBase Database · checked Sep 28, 2026
20	Esgmark	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	18 contacts →
	Partial evidence “ESGmark® helps organisations credibly demonstrate, measure, and improve their Environmental, Social, and Governance (ESG) performance.” Source: RevenueBase Database · checked Sep 28, 2026
21	KEY ESG	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	17 contacts →
	Partial 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 28, 2026
22	Complycraft Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	14 contacts →
	Partial evidence “We are an independent (employee owned) compliance consultancy providing services to FCA regulated firms and to other compliance consultancies.” Source: RevenueBase Database · checked Sep 28, 2026
23	Greenstone	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Indirect evidence “At Greenstone, we provide award-winning software solutions and services enabling organisations to advance their sustainability strategies and become responsible businesses.” Source: RevenueBase Database · checked Sep 28, 2026
24	1rs- 1st Risk Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “1st Risk Solutions is a risk and compliance specialist firm providing pragmatic, effective solutions to enterprise risk management and regulatory requirements.” Source: RevenueBase Database · checked Sep 28, 2026
25	Corporate Citizenship-Part Of SLR	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	13 contacts →
	Indirect evidence “We are now fully part of SLR and look forward to #MakingSustainabilityHappen for our clients and beyond.” 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: esg compliance consulting firms. 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 esg compliance consulting firms.
Partial evidence: Its own public description names part of esg compliance consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name esg compliance consulting firms. 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 248 esg compliance consulting firms based in London, United Kingdom

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Esg compliance consulting firms based in London, United Kingdom at a glance

As of Sep 28, 2026

39.5%Verified-email coverage

6.4Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

179

11-50

51-200

201-500

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 248 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 esg compliance consulting firms, 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 “esg compliance consulting firms”. 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 esg compliance consulting firms), 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 esg compliance consulting firms, 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, 627 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.

Esg compliance consulting firms by metro in the United Kingdom

Esg compliance consulting firms in Manchester25

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 esg compliance consulting firms, 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 esg compliance consulting firms are there based in London, United Kingdom?

RevenueBase identified 248 esg compliance consulting firms 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?

Holtara An Apex Group Company, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most esg compliance consulting firms?

London leads the United Kingdom with 248 headquartered companies, followed by Manchester (25) and Bristol (12).

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 627 verified decision-maker contacts tracked across these 248 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.