Company lists · Data refreshed September 2026

Top 25 Esg strategy consulting firms based in Ireland

Name: Esg strategy consulting firms based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 136 companies tracked

RevenueBase identified 136 company matches for esg strategy consulting firms associated with Ireland as of September 2026 and tracks 850 professional contacts across them, including 388 with verified work emails and 49 with mobile numbers. Dublin is the largest hub.

This list covers company matches for esg strategy consulting firms associated with Ireland, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 30, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 30, 2026 How this list was built

136Companies

850Contacts tracked

388Verified emails

49Mobile numbers

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The 25 largest esg strategy consulting firms based in Ireland

Ranked by team size

Top 25 of 136 company matches for esg strategy consulting firms based in Ireland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Catalyst	Exact match	Dublin 4, IrelandHQ recorded Sep 30, 2026	51-200	99 contacts →
	Exact match “We are a multi-disciplinary ESG, Technical Advisory and digitalisation consultancy with specialist expertise in the real estate, property and construction sectors.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
2	H2 Compliance	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	11-50	56 contacts →
	Exact match “H2 Compliance, part of the Landbell Group, is a global consultancy helping businesses navigate the complex world of chemical, environmental, and circular economy compliance.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
3	20fifty Partners	Exact match	Limerick, IrelandHQ recorded Sep 30, 2026	51-200	48 contacts →
	Exact match “Developing a workforce ready to meet today’s sustainability needs has never been more important.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	Climeaction	Exact match	Cork, IrelandHQ recorded Sep 30, 2026	11-50	42 contacts →
	Exact match “Climeaction Cork & Boston \| B Corp Certified \| ISO 9001 & Accredited Climeaction is an industrial decarbonisation and carbon intelligence company.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
5	Lawler Sustainability	Exact match	Kilkenny, IrelandHQ recorded Sep 30, 2026	11-50	24 contacts →
	Exact match “Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6	Enviroguide A DNV Company	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	11-50	22 contacts →
	Exact match “Enviroguide Consulting has an established reputation for delivering environmental and sustainability consultancy services including ecology, environmental impact assessment…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
7	KSN Horizon	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	11-50	21 contacts →
	Exact match “Climate change, ESG requirements and the transition to a low-carbon economy are reshaping the future of real estate.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
8	Antaris Consulting	Exact match	Limerick, IrelandHQ recorded Sep 30, 2026	11-50	20 contacts →
	Exact match “Founded in 1994, Antaris is an independent, Irish-owned consultancy and training firm with expertise in ISO Management Systems, Environment, Energy, Sustainability and Climate…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9	Plan Energy	Exact match	Sligo, IrelandHQ recorded Sep 30, 2026	11-50	18 contacts →
	Exact match “Welcome to Plan Energy, your trusted partner in decarbonisation and renewable energy.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	Sustainabilityworks Ireland	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	1-10	14 contacts →
	Exact match “SustainabilityWorks is a consultancy on a mission to accelerate climate action and sustainability in Ireland.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	Speco Sustainability Consultancy	Exact match	Galway, IrelandHQ recorded Sep 30, 2026	1-10	14 contacts →
	Exact match “Speco Sustainability Consultancy Ltd.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	Iqutech	Exact match	Annacotty, IrelandHQ recorded Sep 30, 2026	11-50	12 contacts →
	Exact match “At IQUTECH we have long understood and recognised that the best solution to the current disposable model of business is a circular solution.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13	Meehan Green, A KEO Company	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	11-50	11 contacts →
	Exact match “Meehan Green is a company based in Dublin, Ireland that provides sustainability and green building certifications consulting services.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	Carbon Complete	Exact match	Galway, IrelandHQ recorded Sep 30, 2026	1-10	11 contacts →
	Exact match “At Carbon Complete, we specialize in guiding businesses through the complexities of environmental regulations with expert CBAM reporting, sustainability consultancy, and…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	Veri Connect	Exact match	Kilkenny, IrelandHQ recorded Sep 30, 2026	11-50	11 contacts →
	Exact match “Veri Connect empowers your organisation to deliver measurable sustainability outcomes.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Environmental Efficiency	Exact match	Bray, IrelandHQ recorded Sep 30, 2026	1-10	10 contacts →
	Exact match “Our mission is to help improve our clients’ environmental performance in cost effective and practical ways and as a result build a long term relationship.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	Byrne Ó Cléirigh	Exact match	Dublin 2, IrelandHQ recorded Sep 30, 2026	11-50	10 contacts →
	Exact match “Byrne Ó Cléirigh is a firm of professional engineers and management consultants.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	GMJ Associates	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	1-10	9 contacts →
	Exact match “Creating Value by Having Values - We believe in harnessing the power of business to make the world a better place We help organisations with: Corporate Social Responsibility (CSR)…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
19	Visiongreen Consultancy	Exact match	Carlow, IrelandHQ recorded Sep 30, 2026	1-10	8 contacts →
	Exact match “At VisionGreen we are dedicated to making sustainability accessible to businesses of all sizes.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	Greenstreets Environmental Resources LTD	Exact match	Dublin 8, IrelandHQ recorded Sep 30, 2026	11-50	8 contacts →
	Exact match “For over 20 years, Greenstreets has helped companies manage and report on their Extended Producer Responsibility including packaging, electronic products, batteries, textiles, and…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	ENSEN	Exact match	Riverstown Po, IrelandHQ recorded Sep 30, 2026	11-50	7 contacts →
	Exact match “Energy Sustainability Environment ENSEN is a concept – implementation of sustainable principals through the delivery of Energy and Environmental products and services in a…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22	Philip Farrelly & CO	Exact match	Balbriggan, IrelandHQ recorded Sep 30, 2026	1-10	6 contacts →
	Exact match “Established in 1977, Philip Farrelly & Company has been dedicated to excellence in client services, analytical thinking, and adaptive solutions.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	Mantra Strategy	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	1-10	6 contacts →
	Exact match “Mantra Strategy is the Impact Creation Consultancy, making strides to make organisations have a more positive impact on the world (through purpose alignment, better workplaces for…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	We2sure Building Better Together	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	1-10	6 contacts →
	Exact match “We are a company driven by strong Environmental, Social and Governance (ESG) values, dedicated to strengthening our clients’ competitive advantage and ESG profile with…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	KEEL	Exact match	Dublin, IrelandHQ recorded Sep 30, 2026	11-50	6 contacts →
	Exact match “Keel Strategic's formation in 2010 was the collaborative work of a number of people from across the emerging investment world, military command and business leadership with the…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “esg strategy consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 136 esg strategy consulting firms based in Ireland

See the full list, filter by size, metro and specialty, and access 388 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Esg strategy consulting firms based in Ireland at a glance

As of Sep 30, 2026

45.6%Verified-email coverage

5.8%Mobile-number coverage

6.2Average contacts per company

1-10Median size (employees)

34.6%Largest-city concentration · Dublin

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

Freshness & accuracy

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

Email last verified

Median 32.0d

1510–30

29331–60

961–90

090–180

0180+

Company record updated

Median 85.0d

00–30

25831–60

25461–90

40190–180

63180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Ireland whose business descriptions match “esg strategy consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 388 professional contacts with verified work emails across the full matched dataset. 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 30, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Esg strategy consulting firms by metro

Esg strategy consulting firms in Dublin47

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “esg strategy consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many esg strategy consulting firms are there based in Ireland?

RevenueBase identified 136 company matches for esg strategy consulting firms associated with Ireland as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Catalyst tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most esg strategy consulting firms?

Dublin leads with 47 company records, followed by Cork (5) and Galway (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 388 professional contacts with verified work emails tracked across these 136 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 30, 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 SmartSearch, 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.