Company lists · Data refreshed October 2026

Top 25 Commercial energy efficiency companies based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Oct 10, 2026 87 companies tracked

RevenueBase identified 87 company matches for commercial energy efficiency companies associated with Ireland as of October 2026 and tracks 54,857 professional contacts across them, including 6,942 with verified work emails. Dublin is the largest hub.

This list covers company matches for commercial energy efficiency companies 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 October 10, 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 Oct 10, 2026 How this list was built

87Companies

54,857Contacts tracked

6,942Verified emails

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The 25 largest commercial energy efficiency companies based in Ireland

Ranked by team size

Top 25 of 87 company matches for commercial energy efficiency companies based in Ireland, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 10, 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	Johnson Controls	Exact match	Cork, IrelandHQ recorded Oct 10, 2026	10001+	54,046 contacts →
	Exact match “Johnson Controls is a global leader in thermal management, mission-critical building systems, energy efficiency and decarbonization.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
2	Em3	Exact match	Limerick, IrelandHQ recorded Oct 10, 2026	51-200	77 contacts →
	Exact match “EM3 is an industrial energy engineering and advisory partner We work with energy-intensive organisations to drive efficiencies, reduce energy costs, and deliver on decarbonisation…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
3	SE Systems	Exact match	Cork, IrelandHQ recorded Oct 10, 2026	51-200	57 contacts →
	Exact match “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
4	Swyft Energy	Exact match	Bishopstown, IrelandHQ recorded Oct 10, 2026	51-200	46 contacts →
	Exact match “Swyft Energy is an online platform that streamlines energy efficient upgrades for homeowner’s saving them time, hassle and money.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
5	Ashgrove Renewables	Exact match	Cork, IrelandHQ recorded Oct 10, 2026	51-200	37 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
6	Verde Energy Group	Exact match	Little Island, IrelandHQ recorded Oct 10, 2026	11-50	28 contacts →
	Exact match “Verde Energy Group Delivering energy cost savings and carbon reduction solutions to Commercial & Industrial businesses since 2009.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
7	Horizon Energy Group HEG	Exact match	Cork, IrelandHQ recorded Oct 10, 2026	11-50	27 contacts →
	Exact match “Horizon Energy Group delivers technology-led solutions that reduce energy costs, cut carbon and unlock new revenue opportunities.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
8	Lawler Sustainability	Exact match	Kilkenny, IrelandHQ recorded Oct 10, 2026	11-50	25 contacts →
	Exact match “Helping Businesses Cut Energy Costs by up to 50% & Accelerate Their Journey to Net Zero!” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
9	Clean Energy Ireland	Exact match	Aherla, IrelandHQ recorded Oct 10, 2026	11-50	21 contacts →
	Exact match “We offer customers the best products, services and advice to help lower energy costs and reduce their carbon footprint.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
10	House 2 Home Retrofit LTD	Exact match	Dublin 12, IrelandHQ recorded Oct 10, 2026	11-50	20 contacts →
	Exact match “House 2 Home has been Ireland's leading 'one stop shop' for energy upgrades since 2013.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
11	Symphony Energy	Exact match	Wicklow, IrelandHQ recorded Oct 10, 2026	11-50	17 contacts →
	Exact match “Symphony Energy is a global leader in optimising energy performance in the commercial built environment.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
12	Frontline Energy	Exact match	Dublin 4, IrelandHQ recorded Oct 10, 2026	11-50	13 contacts →
	Exact match “We are energy innovators and pride ourselves in delivering an end to end range of expertise for the built environment that saves energy, carbon, time and cost.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
13	ICONS	Exact match	Dublin, IrelandHQ recorded Oct 10, 2026	11-50	12 contacts →
	Exact match “Our working lives are constantly being transformed by new thinking and new technology.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
14	Acutrace	Exact match	Dublin D12 K7x9, IrelandHQ recorded Oct 10, 2026	1-10	11 contacts →
	Exact match “We are a Software and Systems Integration Company measuring Energy Consumption in Commercial and Industrial buildings while helping Businesses meet their CSR and Sustainability…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
15	energybroker.ie	Exact match	Dublin 2, IrelandHQ recorded Oct 10, 2026	1-10	10 contacts →
	Exact match “Trusted by Irish business owners to lower energy costs.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
16	WIA	Exact match	Dublin, IrelandHQ recorded Oct 10, 2026	1-10	10 contacts →
	Exact match “Wia is the energy intelligence platform for the world's largest building portfolios.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
17	Geaney Engineering Consultants	Exact match	Waterford, IrelandHQ recorded Oct 10, 2026	11-50	9 contacts →
	Exact match “Geaney Engineering Consultants are a building services consultancy, and energy management firm offering comprehensive engineering services, project management services, carbon…” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
18	Quantum Energy Ireland	Exact match	3rd Floor, IrelandHQ recorded Oct 10, 2026	1-10	8 contacts →
	Exact match “Helping businesses of all sizes control their energy costs.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
19	Codex Energy Consultants LTD	Exact match	Ballycoolin, IrelandHQ recorded Oct 10, 2026	1-10	7 contacts →
	Exact match “Codex Energy Consultants Ltd is a company of specialist engineering and energy consultants.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
20	Fort Energy	Exact match	Galway, IrelandHQ recorded Oct 10, 2026	1-10	7 contacts →
	Exact match “Fort Energy is a specialist energy consulting firm to the SME, commercial and government sectors.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
21	Dcsix Technologies	Exact match	Cork, IrelandHQ recorded Oct 10, 2026	1-10	6 contacts →
	Exact match “DCSix offer a range of energy monitoring and control solutions to a variety of markets.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
22	Vivid Edge	Exact match	Ucd Belfield Dublin 4, IrelandHQ recorded Oct 10, 2026	1-10	5 contacts →
	Exact match “At Vivid Edge, we're passionate about helping our customers save precious time and funds while cutting carbon.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
23	Arden Energy	Exact match	Dublin, IrelandHQ recorded Oct 10, 2026	1-10	5 contacts →
	Exact match “Arden is an integrated energy management services and energy supply company.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
24	Mosart	Exact match	IrelandHQ recorded Oct 10, 2026	11-50	4 contacts →
	Exact match “Providing expert design, energy consulting & training in high performance buildings since 1993.” Recorded in the RevenueBase company graph · Oct 10, 2026 · View company records in RevenueBase
25	e-volv.ie	Exact match	Ballinlough, IrelandHQ recorded Oct 10, 2026	1-10	3 contacts →
	Exact match “We are dedicated to helping homes and businesses save money & energy, provide energy upgrades and install renewable technology.” Recorded in the RevenueBase company graph · Oct 10, 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 “commercial energy efficiency companies”. 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 87 commercial energy efficiency companies based in Ireland

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Commercial energy efficiency companies based in Ireland at a glance

As of Oct 10, 2026

12.7%Verified-email coverage

630.5Average contacts per company

1-10Median size (employees)

25.3%Largest-city concentration · Dublin

Oct 10, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

10001+

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 87 companies.

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 “commercial energy efficiency companies” 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 6,942 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 October 10, 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.

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 “commercial energy efficiency companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many commercial energy efficiency companies are there based in Ireland?

RevenueBase identified 87 company matches for commercial energy efficiency companies associated with Ireland as of October 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?

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

Which city has the most commercial energy efficiency companies?

Dublin leads with 22 company records, followed by Cork (7) and Waterford (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 6,942 professional contacts with verified work emails tracked across these 87 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 October 10, 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.