Company lists · Data verified August 2026

Top 25 Energy efficiency consulting firms based in Ireland

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

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 97 companies tracked

There are 97 energy efficiency consulting firms headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 621 professional contacts across them, including 254 with verified work emails and 34 with mobile numbers. Dublin is the largest hub.

This list covers energy efficiency consulting firms headquartered in Ireland, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

97Companies

621Contacts tracked

254Verified emails

34Mobile numbers

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The 25 largest energy efficiency consulting firms based in Ireland

Ranked by team size

Top 25 of 97 energy efficiency consulting firms based in Ireland, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Em3	Limerick	51-200	86	51
2	SE Systems	Cork	51-200	59	34
3	KSN Energy	Dublin	51-200	32	2
4	Mosart	n/a	11-50	17	11
5	Symphony Energy	Wicklow	11-50	17	5
6	Passive Dynamics	Dublin	11-50	15	11
7	Frontline Energy	Dublin	11-50	15	10
8	Digren Energy	n/a	11-50	14	9
9	ENX	n/a	11-50	14	7
10	Systemcore	Dublin	11-50	14	6
11	BPC Engineers	Dublin	11-50	12	12
12	Kore Energy	n/a	11-50	11	8
13	Meehan Green, A KEO Company	n/a	11-50	11	6
14	energybroker.ie	n/a	1-10	10	8
15	Geaney Engineering Consultants	Waterford	11-50	9	6
16	Ecoaer	n/a	11-50	7	5
17	ENSEN	Xxx	11-50	7	3
18	Codex Energy Consultants LTD	n/a	1-10	6	5
19	Vivid Edge	Dublin	1-10	6	5
20	Quantum Energy Ireland	Cork	1-10	6	3
21	Fort Energy	Galway	1-10	6	3
22	e-volv.ie	Ballinlough	1-10	6	3
23	bercerts.ie	n/a	1-10	5	3
24	Evia Sustainable Real Estate Limited	Dublin	11-50	4	4
25	Energy Reform Limited	Dublin	1-10	4	3

Showing 25 of 97 energy efficiency consulting firms based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 254 reachable decision-makers.

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Energy efficiency consulting firms based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 21 HQs

34Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Energy efficiency consulting firms by metro

Metro	Companies
Energy efficiency consulting firms in Dublin	21
Energy efficiency consulting firms in Cork	6
Energy efficiency consulting firms in Waterford	5
Energy efficiency consulting firms in Wicklow	2
Energy efficiency consulting firms in Limerick	2
Energy efficiency consulting firms in Blackrock	2
Energy efficiency consulting firms in Galway	2

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “energy efficiency consulting firms”, with match quality audited by blind human judging, and headquartered in Ireland.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many energy efficiency consulting firms are there based in Ireland?

There are 97 energy efficiency consulting firms headquartered in Ireland as of August 2026 (RevenueBase).

What is the largest company on this list?

Em3, headquartered in Limerick, tops this list with the largest team on record.

Which city has the most energy efficiency consulting firms?

Dublin leads with 21 headquartered companies, followed by Cork (6) and Waterford (5).

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 254 verified decision-maker contacts tracked across these 97 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.