Company lists · Data refreshed September 2026

Top 25 Energy efficiency service companies based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 66 companies tracked

RevenueBase identified 66 energy efficiency service companies headquartered in Ireland as of September 2026 and tracks 473 professional contacts across them, including 186 with verified work emails. Dublin is the largest hub.

This list covers energy efficiency service 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 16, 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 16, 2026 86% judged on-target in blind review

66Companies

473Contacts tracked

186Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest energy efficiency service companies based in Ireland

Ranked by team size

Top 25 of 66 energy efficiency service companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy efficiency service 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	SE Systems	Partial evidence	Cork, IrelandHQ checked Sep 16, 2026	51-200	59 contacts →
	Partial evidence “SE Systems (Sustainable Energy Systems) is Ireland's leading energy solutions provider.” Source: RevenueBase Database · checked Sep 16, 2026
2	Swyft Energy	Strong evidence	Bishopstown, IrelandHQ checked Sep 16, 2026	51-200	56 contacts →
	Strong evidence “Swyft Energy is an online platform that streamlines energy efficient upgrades for homeowner’s saving them time, hassle and money.” Source: RevenueBase Database · checked Sep 16, 2026
3	Ashgrove Renewables	Partial evidence	Cork, IrelandHQ checked Sep 16, 2026	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 Sep 16, 2026
4	Mosart	Partial evidence	IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “Providing expert design, energy consulting & training in high performance buildings since 1993.” Source: RevenueBase Database · checked Sep 16, 2026
5	Energlaze Home Energy Upgrades	Partial evidence	Wexford, IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “At Energlaze Home Energy Upgrades, not only are we committed to improving the overall comfort of your home, but we are also focused on reducing your energy costs and can help you…” Source: RevenueBase Database · checked Sep 16, 2026
6	Symphony Energy	Partial evidence	Wicklow, IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Partial evidence “Symphony Energy is a global leader in optimising energy performance in the commercial built environment.” Source: RevenueBase Database · checked Sep 16, 2026
7	Frontline Energy	Partial evidence	Dublin 4, IrelandHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 16, 2026
8	Blanchfield Heating	Indirect evidence	Kilkenny, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Blanchfield Heating was established in 1994 as a private owned business with a flexible client-focused approach and an appreciation of long term business relationships.” Source: RevenueBase Database · checked Sep 16, 2026
9	ICONS	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Indirect evidence “Our working lives are constantly being transformed by new thinking and new technology.” Source: RevenueBase Database · checked Sep 16, 2026
10	Kaizen Energy LTD	Partial evidence	IrelandHQ checked Sep 16, 2026	11-50	10 contacts →
	Partial evidence “Kaizen Energy offer full operational and management contracts for district and communal heating systems (DHS / DES).” Source: RevenueBase Database · checked Sep 16, 2026
11	Geaney Engineering Consultants	Partial evidence	Waterford, IrelandHQ checked Sep 16, 2026	11-50	9 contacts →
	Partial evidence “Geaney Engineering Consultants are a building services consultancy, and energy management firm offering comprehensive engineering services, project management services, carbon…” Source: RevenueBase Database · checked Sep 16, 2026
12	DND Group	Indirect evidence	Ballycoolin, IrelandHQ checked Sep 16, 2026	11-50	8 contacts →
	Indirect evidence “About Us At DND Group, we are not just a facilities and Building Services company; we are the architects of seamless, sustainable, and electrifying environments.” Source: RevenueBase Database · checked Sep 16, 2026
13	Vivid Edge	Indirect evidence	Ucd Belfield Dublin 4, IrelandHQ checked Sep 16, 2026	1-10	6 contacts →
	Indirect evidence “At Vivid Edge, we're passionate about helping our customers save precious time and funds while cutting carbon.” Source: RevenueBase Database · checked Sep 16, 2026
14	Codex Energy Consultants LTD	Partial evidence	Ballycoolin, IrelandHQ checked Sep 16, 2026	1-10	6 contacts →
	Partial evidence “Codex Energy Consultants Ltd is a company of specialist engineering and energy consultants.” Source: RevenueBase Database · checked Sep 16, 2026
15	Arden Energy	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	1-10	6 contacts →
	Partial evidence “Arden is an integrated energy management services and energy supply company.” Source: RevenueBase Database · checked Sep 16, 2026
16	Fort Energy	Partial evidence	Galway, IrelandHQ checked Sep 16, 2026	1-10	6 contacts →
	Partial evidence “Fort Energy is a specialist energy consulting firm to the SME, commercial and government sectors.” Source: RevenueBase Database · checked Sep 16, 2026
17	e-volv.ie	Partial evidence	Ballinlough, IrelandHQ checked Sep 16, 2026	1-10	6 contacts →
	Partial evidence “We are dedicated to helping homes and businesses save money & energy, provide energy upgrades and install renewable technology.” Source: RevenueBase Database · checked Sep 16, 2026
18	Impact Energy Solutions	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	1-10	4 contacts →
	Indirect evidence “We assist clients reduce business costs through a suite of passive solutions.” Source: RevenueBase Database · checked Sep 16, 2026
19	Scott Group Smart Buildings	Strong evidence	Raheny, IrelandHQ checked Sep 16, 2026	11-50	3 contacts →
	Strong evidence “Specialties- Development & implementation of renewable energy & energy efficiency projects • Strategy development & investment planning • Energy savings planning & retrofits •…” Source: RevenueBase Database · checked Sep 16, 2026
20	Cardienergy	Partial evidence	Wicklow, IrelandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “Cardi Energy is a leading Energy Services Consultancy dedicated to revolutionising the energy landscape for commercial buildings.” Source: RevenueBase Database · checked Sep 16, 2026
21	Powertherm Solutions	Partial evidence	Blackrock, IrelandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “PowerTherm Solutions was founded in 2002 and has since established itself as one of Ireland’s leading energy consultancies and energy-related services companies.” Source: RevenueBase Database · checked Sep 16, 2026
22	ISO Baseline LTD	Partial evidence	Carrigaline, IrelandHQ checked Sep 16, 2026	1-10	3 contacts →
	Partial evidence “Energy Management for the 21st Century: Baseline has been developed for the energy manager that wants to focus their efforts towards energy management using a structured approach.” Source: RevenueBase Database · checked Sep 16, 2026
23	Century Retrofit LTD	Indirect evidence	Galway, IrelandHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
24	A.M Rogers Associates	Indirect evidence	Ashbourne, IrelandHQ checked Sep 16, 2026	1-10	2 contacts →
	Indirect evidence “AMRA Engineering Consultants provides Mechanical, Electrical, Plumbing Design and Consulting services for commercial, industrial and residential developments throughout Ireland…” Source: RevenueBase Database · checked Sep 16, 2026
25	Systemcore	Indirect evidence	IrelandHQ checked Sep 16, 2026	11-50	2 contacts →
	Indirect evidence “Systems thinking is one of the core skillsets of the SystemCore team, We build a systems approach into all that we do.” Source: RevenueBase Database · checked Sep 16, 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: energy efficiency service 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 energy efficiency service companies.
Partial evidence: Its own public description names part of energy efficiency service companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy efficiency service 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 66 energy efficiency service companies based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 186 reachable decision-makers.

Free signup · no credit card

View the full list →

Energy efficiency service companies based in Ireland at a glance

As of Sep 16, 2026

39.3%Verified-email coverage

7.2Average contacts per company

1-10Median size (employees)

18.2%Largest-city concentration · Dublin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 66 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 energy efficiency service 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 “energy efficiency service 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 energy efficiency service 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 energy efficiency service 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, 186 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 16, 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.

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 energy efficiency service 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 energy efficiency service companies are there based in Ireland?

RevenueBase identified 66 energy efficiency service 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?

SE Systems, headquartered in Cork, tops this list with the largest team on record.

Which city has the most energy efficiency service companies?

Dublin leads with 12 headquartered companies, followed by Cork (3) and Galway (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 186 verified decision-maker contacts tracked across these 66 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 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 66 energy efficiency service companies based in Ireland. Start with a free account, no credit card.

Download this list →

Related lists

Energy efficiency service companies by geography

Browse the directory

Browse: Companies home · All Ireland lists · All Energy efficiency service companies lists · New lists

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.