Company lists · Data refreshed September 2026

Top 25 Environmental sustainability companies based in Ireland

Name: Environmental sustainability companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 82 companies tracked

RevenueBase identified 82 environmental sustainability companies headquartered in Ireland as of September 2026 and tracks 1,035 professional contacts across them, including 213 with verified work emails. Dublin is the largest hub.

This list covers environmental sustainability companies headquartered in Ireland, 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 19, 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 19, 2026 86% judged on-target in blind review

82Companies

1,035Contacts tracked

213Verified emails

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The 25 largest environmental sustainability companies based in Ireland

Ranked by team size

Top 25 of 82 environmental sustainability companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to environmental sustainability 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	20fifty Partners	Partial evidence	Limerick, IrelandHQ checked Sep 19, 2026	51-200	48 contacts →
	Partial evidence “Developing a workforce ready to meet today’s sustainability needs has never been more important.” Source: RevenueBase Database · checked Sep 19, 2026
2	Climeaction	Indirect evidence	Cork, IrelandHQ checked Sep 19, 2026	11-50	42 contacts →
	Indirect evidence “Climeaction Cork & Boston \| B Corp Certified \| ISO 9001 & Accredited Climeaction is an industrial decarbonisation and carbon intelligence company.” Source: RevenueBase Database · checked Sep 19, 2026
3	Lawler Sustainability	Indirect evidence	Kilkenny, IrelandHQ checked Sep 19, 2026	11-50	24 contacts →
	Indirect evidence “Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Source: RevenueBase Database · checked Sep 19, 2026
4	Enviroguide A DNV Company	Strong evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	22 contacts →
	Strong evidence “Enviroguide Consulting has an established reputation for delivering environmental and sustainability consultancy services including ecology, environmental impact assessment…” Source: RevenueBase Database · checked Sep 19, 2026
5	Antaris Consulting	Strong evidence	Limerick, IrelandHQ checked Sep 19, 2026	11-50	20 contacts →
	Strong evidence “Founded in 1994, Antaris is an independent, Irish-owned consultancy and training firm with expertise in ISO Management Systems, Environment, Energy, Sustainability and Climate…” Source: RevenueBase Database · checked Sep 19, 2026
6	Native Events	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	1-10	19 contacts →
	Indirect evidence “Native Events is Ireland’s leading sustainable event production company.” Source: RevenueBase Database · checked Sep 19, 2026
7	Plan Energy	Indirect evidence	Sligo, IrelandHQ checked Sep 19, 2026	11-50	18 contacts →
	Indirect evidence “Welcome to Plan Energy, your trusted partner in decarbonisation and renewable energy.” Source: RevenueBase Database · checked Sep 19, 2026
8	Sustainabilityworks Ireland	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	1-10	14 contacts →
	Partial evidence “SustainabilityWorks is a consultancy on a mission to accelerate climate action and sustainability in Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
9	Iqutech	Indirect evidence	Annacotty, IrelandHQ checked Sep 19, 2026	11-50	12 contacts →
	Indirect evidence “At IQUTECH we have long understood and recognised that the best solution to the current disposable model of business is a circular solution.” Source: RevenueBase Database · checked Sep 19, 2026
10	Meehan Green, A KEO Company	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “Meehan Green is a company based in Dublin, Ireland that provides sustainability and green building certifications consulting services.” Source: RevenueBase Database · checked Sep 19, 2026
11	Carbon Complete	Strong evidence	Galway, IrelandHQ checked Sep 19, 2026	1-10	11 contacts →
	Strong evidence “At Carbon Complete, we specialize in guiding businesses through the complexities of environmental regulations with expert CBAM reporting, sustainability consultancy, and…” Source: RevenueBase Database · checked Sep 19, 2026
12	Veri Connect	Partial evidence	Kilkenny, IrelandHQ checked Sep 19, 2026	11-50	11 contacts →
	Partial evidence “Veri Connect empowers your organisation to deliver measurable sustainability outcomes.” Source: RevenueBase Database · checked Sep 19, 2026
13	Environmental Efficiency	Partial evidence	Bray, IrelandHQ checked Sep 19, 2026	1-10	10 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
14	Visiongreen Consultancy	Partial evidence	Carlow, IrelandHQ checked Sep 19, 2026	1-10	8 contacts →
	Partial evidence “At VisionGreen we are dedicated to making sustainability accessible to businesses of all sizes.” Source: RevenueBase Database · checked Sep 19, 2026
15	Myenergi Ireland	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	1-10	7 contacts →
	Indirect evidence “Creating a sustainable future through our eco - smart technology.” Source: RevenueBase Database · checked Sep 19, 2026
16	ENSEN	Strong evidence	Riverstown Po, IrelandHQ checked Sep 19, 2026	11-50	7 contacts →
	Strong evidence “Energy Sustainability Environment ENSEN is a concept – implementation of sustainable principals through the delivery of Energy and Environmental products and services in a…” Source: RevenueBase Database · checked Sep 19, 2026
17	Environet Solutions	Strong evidence	Dungarvan, IrelandHQ checked Sep 19, 2026	1-10	5 contacts →
	Strong evidence “Environet Solutions provides sustainability and environmental compliance consultancy services to industry and the public sector.” Source: RevenueBase Database · checked Sep 19, 2026
18	Panther Environmental Solutions LTD	Partial evidence	Green Road, IrelandHQ checked Sep 19, 2026	1-10	5 contacts →
	Partial evidence “Panther Environmental Solutions Ltd is an Environmental Consultancy Company providing expert environmental advice to the Food, Manufacturing and Pharmaceutical Industries.” Source: RevenueBase Database · checked Sep 19, 2026
19	Evia Sustainable Real Estate Limited	Partial evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	4 contacts →
	Partial evidence “At Evia, we merge our property expertise with a deep commitment to environmental leadership, ensuring the protection and enhancement of real estate assets.” Source: RevenueBase Database · checked Sep 19, 2026
20	Stepstone Consulting	Partial evidence	Dun Laoghaire, IrelandHQ checked Sep 19, 2026	1-10	4 contacts →
	Partial evidence “Growing Human Capital For The Sustainable Organisation™ Delivering on the commitment to an ambitious vision for sustainability requires a “sustainability engine” to transform…” Source: RevenueBase Database · checked Sep 19, 2026
21	Scott Group Smart Buildings	Indirect evidence	Raheny, IrelandHQ checked Sep 19, 2026	11-50	3 contacts →
	Indirect evidence “Specialties- Development & implementation of renewable energy & energy efficiency projects • Strategy development & investment planning • Energy savings planning & retrofits •…” Source: RevenueBase Database · checked Sep 19, 2026
22	Ecos Environmental Consultants Limited	Partial evidence	Limerick, IrelandHQ checked Sep 19, 2026	1-10	3 contacts →
	Partial evidence “ECOS Environmental Consultants works with Multi-National and SME clients using environmental management as a business tool to support a broad range of business sectors.” Source: RevenueBase Database · checked Sep 19, 2026
23	Global Green	Partial evidence	Carrick On Shannon, IrelandHQ checked Sep 19, 2026	11-50	2 contacts →
	Partial evidence “At Global Green, we are at the forefront of delivering innovative and sustainable environmental and energy solutions across the globe.” Source: RevenueBase Database · checked Sep 19, 2026
24	Native Cabins	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	1-10	2 contacts →
	Indirect evidence “You stay in cabins, we plant native trees’ Native is a new hospitality concept.” Source: RevenueBase Database · checked Sep 19, 2026
25	Pragmatica B Corp	Partial evidence	Naas, IrelandHQ checked Sep 19, 2026	1-10	2 contacts →
	Partial evidence “At Pragmatica, we provide tailored sustainability services as well as deep expertise, to help our clients to add value to their sustainability, carbon and ESG journeys.” Source: RevenueBase Database · checked Sep 19, 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: environmental sustainability 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 environmental sustainability companies.
Partial evidence: Its own public description names part of environmental sustainability companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name environmental sustainability 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 82 environmental sustainability companies based in Ireland

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Environmental sustainability companies based in Ireland at a glance

As of Sep 19, 2026

20.6%Verified-email coverage

12.6Average contacts per company

1-10Median size (employees)

31.7%Largest-city concentration · Dublin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

Email recency for this list is measured worldwide rather than for Ireland, so it is reported there. Company counts and contact totals on this page are exact for Ireland, over 82 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 environmental sustainability 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 Ireland whose own description of what they do matches “environmental sustainability 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 environmental sustainability 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 environmental sustainability companies, and records with no verified work email. Companies headquartered outside Ireland 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, 213 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 19, 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.

Environmental sustainability companies by metro

Environmental sustainability companies in Dublin26

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 environmental sustainability 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 environmental sustainability companies are there based in Ireland?

RevenueBase identified 82 environmental sustainability companies headquartered in Ireland 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?

20fifty Partners, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most environmental sustainability companies?

Dublin leads with 26 headquartered companies, followed by Limerick (4) and Cork (3).

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 213 verified decision-maker contacts tracked across these 82 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 19, 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.