Company lists · Data refreshed August 2026

Top 25 Clean energy consultancy companies based in Ireland

Name: Clean energy consultancy companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Aug 31, 2026 180 companies tracked

RevenueBase identified 180 clean energy consultancy companies headquartered in Ireland as of August 2026 and tracks 2,226 professional contacts across them, including 823 with verified work emails and 100 with mobile numbers. Dublin is the largest hub.

This list covers clean energy consultancy 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 August 31, 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 RevenueBase Smart Search rating on every row Refreshed Aug 31, 2026 86% judged on-target in blind review

180Companies

2,226Contacts tracked

823Verified emails

100Mobile numbers

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The 25 largest clean energy consultancy companies based in Ireland

Ranked by team size

Top 25 of 180 clean energy consultancy companies based in Ireland, ranked by team size, largest first. Data refreshed Aug 31, 2026. RevenueBase Smart Search rates how each company's information relates to clean energy consultancy 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	SSE Airtricity	Partial evidence	Ireland	501-1,000	658 contacts →
	Partial evidence “SSE Airtricity has been harnessing our greatest natural resource for the past 25 years, providing cleaner, renewable energy† for homes and businesses across the country.” Source: RevenueBase Database · checked Aug 31, 2026
2	Cornwall Insight	Partial evidence	Ireland	51-200	111 contacts →
	Partial evidence “Cornwall Insight are trusted independent experts in the energy industry.” Source: RevenueBase Database · checked Aug 31, 2026
3	Electroroute	Partial evidence	Letterkenny, Ireland	51-200	100 contacts →
	Partial evidence “ElectroRoute is an international, renewables focused, energy trading and services company.” Source: RevenueBase Database · checked Aug 31, 2026
4	Pinergy	Partial evidence	Dublin, Ireland	51-200	99 contacts →
	Partial evidence “Pinergy is an energy transition company We’re helping our customers make data informed choices today, to take control of their energy tomorrows.” Source: RevenueBase Database · checked Aug 31, 2026
5	Dulas LTD	Strong evidence	Ireland	51-200	64 contacts →
	Strong evidence “With over 35 years of experience in the clean energy sector, Dulas is an award-winning renewable energy installer and consultancy, specialising in the wind, solar and hydro…” Source: RevenueBase Database · checked Aug 31, 2026
6	SE Systems	Partial evidence	Cork, Ireland	51-200	59 contacts →
	Partial evidence “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Source: RevenueBase Database · checked Aug 31, 2026
7	Varming Consulting Engineers LTD	Indirect evidence	Roscommon, Ireland	11-50	57 contacts →
	Indirect evidence “At Varming, we’re all about cutting-edge design and meticulous oversight of mechanical and electrical services, whether it’s for brand-new constructions or revitalizing existing…” Source: RevenueBase Database · checked Aug 31, 2026
8	NEO Environmental LTD	Strong evidence	Naas, Ireland	11-50	46 contacts →
	Strong evidence “Neo Environmental Ltd is a multidisciplinary consultancy that provide cost effective environmental and technical services to the commercial energy, property, aggregates and…” Source: RevenueBase Database · checked Aug 31, 2026
9	Ecoplex Energy	Strong evidence	Blanchardstown, Ireland	51-200	40 contacts →
	Strong evidence “Your trusted Irish partner in delivering clean energy solutions for modern feelgood living and productivity – the freedom to harness your own zero-emission, zero-cost energy for…” Source: RevenueBase Database · checked Aug 31, 2026
10	Ashgrove Renewables	Partial evidence	Ireland	51-200	33 contacts →
	Partial evidence “We take great pride in our data-driven, scientific approach to energy solutions, spearheaded by a team known for its experience and creative design skills.” Source: RevenueBase Database · checked Aug 31, 2026
11	KSN Energy	Indirect evidence	Dublin, Ireland	51-200	32 contacts →
	Indirect evidence “Complex operations made simple.” Source: RevenueBase Database · checked Aug 31, 2026
12	Verde Energy Group	Partial evidence	Little Island, Ireland	11-50	31 contacts →
	Partial evidence “Verde Energy Group Delivering energy cost savings and carbon reduction solutions to Commercial & Industrial businesses since 2009.” Source: RevenueBase Database · checked Aug 31, 2026
13	Urbanvolt	Partial evidence	Ireland	11-50	27 contacts →
	Partial evidence “UrbanVolt is a global leader in financing decarbonised solutions for businesses, helping companies achieve their sustainability goals through innovative energy solutions.” Source: RevenueBase Database · checked Aug 31, 2026
14	Horizon Energy Group HEG	Partial evidence	Cork, Ireland	11-50	26 contacts →
	Partial evidence “Horizon Energy Group delivers technology-led solutions that reduce energy costs, cut carbon and unlock new revenue opportunities.” Source: RevenueBase Database · checked Aug 31, 2026
15	Enviroguide A DNV Company	Partial evidence	Ireland	11-50	23 contacts →
	Partial evidence “Enviroguide Consulting has an established reputation for delivering environmental and sustainability consultancy services including ecology, environmental impact assessment…” Source: RevenueBase Database · checked Aug 31, 2026
16	KSN Horizon	Indirect evidence	Dublin, Ireland	11-50	21 contacts →
	Indirect evidence “Climate change, ESG requirements and the transition to a low-carbon economy are reshaping the future of real estate.” Source: RevenueBase Database · checked Aug 31, 2026
17	Brightwind	Partial evidence	Ireland	11-50	18 contacts →
	Partial evidence “Be confident in your wind investment decisions with BrightWind." BrightWind provides a boutique resource and energy assessment service led by leading analysts with over 100+ years…” Source: RevenueBase Database · checked Aug 31, 2026
18	Clean Energy Ireland	Partial evidence	Rathard Aherla, Ireland	11-50	18 contacts →
	Partial evidence “We offer customers the best products, services and advice to help lower energy costs and reduce their carbon footprint.” Source: RevenueBase Database · checked Aug 31, 2026
19	Plan Energy	Partial evidence	Sligo, Ireland	11-50	17 contacts →
	Partial evidence “Welcome to Plan Energy, your trusted partner in decarbonisation and renewable energy.” Source: RevenueBase Database · checked Aug 31, 2026
20	Mosart	Partial evidence	Ireland	11-50	17 contacts →
	Partial evidence “Providing expert design, energy consulting & training in high performance buildings since 1993.” Source: RevenueBase Database · checked Aug 31, 2026
21	Azorom	Partial evidence	Ireland	11-50	16 contacts →
	Partial evidence “AZOROM provides advisory services to organisations operating in the energy sector in Ireland and Worldwide.” Source: RevenueBase Database · checked Aug 31, 2026
22	Passive Dynamics	Indirect evidence	Dublin, Ireland	11-50	15 contacts →
	Indirect evidence “Passive Dynamics was set up in 2020 with a vision that expert knowledge and passion can empower.” Source: RevenueBase Database · checked Aug 31, 2026
23	Digren Energy	Strong evidence	Ireland	11-50	14 contacts →
	Strong evidence “We are an energy management consultancy.” Source: RevenueBase Database · checked Aug 31, 2026
24	NRG Panel	Indirect evidence	Ireland	51-200	14 contacts →
	Indirect evidence “NRG Panel are one of Ireland's leading installers of solar panels and air to water heat pumps.” Source: RevenueBase Database · checked Aug 31, 2026
25	ENX	Indirect evidence	Ireland	11-50	14 contacts →
	Indirect evidence “Mechanical, Electrical and Sustainability Consulting Engineers” Source: RevenueBase Database · checked Aug 31, 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: clean energy consultancy 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 clean energy consultancy companies.
Partial evidence: Its own public description names part of clean energy consultancy companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name clean energy consultancy 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 180 clean energy consultancy companies based in Ireland

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Clean energy consultancy companies based in Ireland at a glance

As of Aug 31, 2026

37.0%Verified-email coverage

4.5%Mobile-number coverage

12.4Average contacts per company

1-10Median size (employees)

20.6%Largest-city concentration · Dublin

Aug 31, 2026Page data refreshed

Companies by employee count

1-10

107

11-50

51-200

501-1,000

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 clean energy consultancy 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 “clean energy consultancy 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 clean energy consultancy 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 clean energy consultancy 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, 823 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 August 31, 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.

Clean energy consultancy companies by metro

Clean energy consultancy companies in Dublin37

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 clean energy consultancy 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 clean energy consultancy companies are there based in Ireland?

RevenueBase identified 180 clean energy consultancy companies headquartered in Ireland as of August 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?

SSE Airtricity, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most clean energy consultancy companies?

Dublin leads with 37 headquartered companies, followed by Cork (12) and Galway (8).

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 823 verified decision-maker contacts tracked across these 180 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 31, 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.