Company lists · Data verified August 2026

Top 25 Clean energy consulting firms based in Ireland

Name: Clean energy 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 135 companies tracked

There are 135 clean energy consulting firms headquartered in Ireland (RevenueBase, August 2026). RevenueBase tracks 1,072 professional contacts across them, including 589 with verified work emails and 53 with mobile numbers. Dublin is the largest hub.

This list covers clean energy 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.

135Companies

1,072Contacts tracked

589Verified emails

53Mobile numbers

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The 25 largest clean energy consulting firms based in Ireland

Ranked by team size

Top 25 of 135 clean energy 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	Cornwall Insight	n/a	51-200	111	79
2	Electroroute	Letterkenny	51-200	100	67
3	Pinergy	Dublin	51-200	99	77
4	Dulas LTD	n/a	51-200	64	45
5	SE Systems	Cork	51-200	59	34
6	Alternative Energy Ireland	Tullamore	1-10	27	19
7	Horizon Energy Group HEG	Cork	11-50	26	11
8	Enviroguide A DNV Company	n/a	11-50	23	13
9	KSN Horizon	Dublin	11-50	21	13
10	Clean Energy Ireland	Rathard Aherla	11-50	18	5
11	Plan Energy	Sligo	11-50	17	14
12	Mosart	n/a	11-50	17	11
13	Azorom	n/a	11-50	16	11
14	Passive Dynamics	Dublin	11-50	15	11
15	Digren Energy	n/a	11-50	14	9
16	ENX	n/a	11-50	14	7
17	Sustainabilityworks Ireland	Dublin	1-10	13	11
18	Lp3	Galway	11-50	13	9
19	Kore Energy	n/a	11-50	11	8
20	Meehan Green, A KEO Company	n/a	11-50	11	6
21	Danu Energy Consulting LTD	Dublin	11-50	10	9
22	energybroker.ie	n/a	1-10	10	8
23	Geaney Engineering Consultants	Waterford	11-50	9	6
24	Visiongreen Consultancy	Carlow	1-10	8	7
25	BFA Consulting	Bray	1-10	8	4

Showing 25 of 135 clean energy consulting firms based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 589 reachable decision-makers.

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Clean energy consulting firms based in Ireland at a glance

As of Aug 28, 2026

1-10Median size (employees)

DublinLargest hub · 32 HQs

53Contacts with mobile numbers

3Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Clean energy consulting firms by metro

Metro	Companies
Clean energy consulting firms in Dublin	32
Clean energy consulting firms in Cork	7
Clean energy consulting firms in Galway	6
Clean energy consulting firms in Waterford	4
Clean energy consulting firms in Limerick	3
Clean energy consulting firms in Bray	2
Clean energy consulting firms in Kilkenny	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 “clean energy 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; 3 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 clean energy consulting firms are there based in Ireland?

There are 135 clean energy consulting firms headquartered in Ireland as of August 2026 (RevenueBase).

What is the largest company on this list?

Cornwall Insight, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most clean energy consulting firms?

Dublin leads with 32 headquartered companies, followed by Cork (7) and Galway (6).

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 589 verified decision-maker contacts tracked across these 135 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.