Company lists · Data verified 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 Verified Aug 28, 2026 180 companies tracked

There are 180 clean energy consultancy companies headquartered in Ireland (RevenueBase, August 2026). RevenueBase 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. Data current as of August 28, 2026.

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 verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	SSE Airtricity	n/a	501-1,000	658	24
2	Cornwall Insight	n/a	51-200	111	79
3	Electroroute	Letterkenny	51-200	100	67
4	Pinergy	Dublin	51-200	99	77
5	Dulas LTD	n/a	51-200	64	45
6	SE Systems	Cork	51-200	59	34
7	Varming Consulting Engineers LTD	Roscommon	11-50	57	36
8	NEO Environmental LTD	Naas	11-50	46	33
9	Ecoplex Energy	Blanchardstown	51-200	40	21
10	Ashgrove Renewables	n/a	51-200	33	6
11	KSN Energy	Dublin	51-200	32	2
12	Verde Energy Group	Little Island	11-50	31	13
13	Urbanvolt	n/a	11-50	27	8
14	Horizon Energy Group HEG	Cork	11-50	26	11
15	Enviroguide A DNV Company	n/a	11-50	23	13
16	KSN Horizon	Dublin	11-50	21	13
17	Brightwind	n/a	11-50	18	13
18	Clean Energy Ireland	Rathard Aherla	11-50	18	5
19	Plan Energy	Sligo	11-50	17	14
20	Mosart	n/a	11-50	17	11
21	Azorom	n/a	11-50	16	11
22	Passive Dynamics	Dublin	11-50	15	11
23	Digren Energy	n/a	11-50	14	9
24	NRG Panel	n/a	51-200	14	7
25	ENX	n/a	11-50	14	7

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 28, 2026

1-10Median size (employees)

DublinLargest hub · 37 HQs

100Contacts with mobile numbers

4Emails re-verified in last 30 days

Companies by employee count

1-10

107

11-50

51-200

501-1,000

Clean energy consultancy companies by metro

Metro	Companies
Clean energy consultancy companies in Dublin	37
Clean energy consultancy companies in Cork	12
Clean energy consultancy companies in Galway	8
Clean energy consultancy companies in Waterford	5
Clean energy consultancy companies in Limerick	3
Clean energy consultancy companies in Blackrock	2
Clean energy consultancy companies in Wicklow	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 consultancy companies”, 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; 4 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 consultancy companies are there based in Ireland?

There are 180 clean energy consultancy companies headquartered in Ireland as of August 2026 (RevenueBase).

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 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.