Company lists · Data refreshed September 2026

Top 25 Renewable energy startups based in Ireland

Name: Renewable energy startups based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 114 companies tracked

RevenueBase identified 114 renewable energy startups headquartered in Ireland as of September 2026 and tracks 2,816 professional contacts across them, including 763 with verified work emails. Dublin is the largest hub.

This list covers renewable energy startups 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

114Companies

2,816Contacts tracked

763Verified emails

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The 25 largest renewable energy startups based in Ireland

Ranked by team size

Top 25 of 114 renewable energy startups 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 renewable energy startups: 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	SSE Airtricity	Strong evidence	IrelandHQ checked Sep 16, 2026	501-1,000	661 contacts →
	Strong evidence “SSE Airtricity has been harnessing our greatest natural resource for the past 25 years, providing cleaner, renewable energy† for homes and businesses across the country.” Source: RevenueBase Database · checked Sep 16, 2026
2	Amarenco	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	201-500	255 contacts →
	Strong evidence “Amarenco is one of the leading independent renewable energy producers in Europe.” Source: RevenueBase Database · checked Sep 16, 2026
3	Energia Group	Strong evidence	Blanchardstown, IrelandHQ checked Sep 16, 2026	1,001-5,000	222 contacts →
	Strong evidence “We are a modern integrated energy utility with a focus on renewable technologies supported by flexible and distributed generation.” Source: RevenueBase Database · checked Sep 16, 2026
4	Electroroute	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	51-200	98 contacts →
	Strong evidence “ElectroRoute is an international, renewables focused, energy trading and services company.” Source: RevenueBase Database · checked Sep 16, 2026
5	NTR PLC	Partial evidence	Sandyford, IrelandHQ checked Sep 16, 2026	11-50	61 contacts →
	Partial evidence “Established in 1978, NTR is an experienced sustainable infrastructure investor and asset manager driving Europe’s clean energy transition.” Source: RevenueBase Database · checked Sep 16, 2026
6	BNRG	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	49 contacts →
	Indirect evidence “At BNRG, partnerships are paramount.” Source: RevenueBase Database · checked Sep 16, 2026
7	Power Capital Renewable Energy	Strong evidence	Dublin 2, IrelandHQ checked Sep 16, 2026	11-50	47 contacts →
	Strong evidence “At Power Capital Renewable Energy we are driven by our purpose to contribute to the regeneration of our planet and its people.” Source: RevenueBase Database · checked Sep 16, 2026
8	Simply Blue Energy	Strong evidence	Cork, IrelandHQ checked Sep 16, 2026	51-200	47 contacts →
	Strong evidence “Simply Blue Group, headquartered in Cork, Ireland, is a leading renewable energy developer with a focus on replacing fossil fuels with clean energy.” Source: RevenueBase Database · checked Sep 16, 2026
9	Galetech Group	Strong evidence	Stradone, IrelandHQ checked Sep 16, 2026	51-200	45 contacts →
	Strong evidence “Galetech Group is a leading Irish renewable energy company delivering smart, end-to-end clean energy solutions for clients across wind, solar, energy storage, sustainable…” Source: RevenueBase Database · checked Sep 16, 2026
10	AER Soléir	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	n/a	40 contacts →
	Partial evidence “Aer Soléir develops and builds best-in-class, large-scale, energy transition projects that will provide material, long-lasting economic benefits to communities across Europe.” Source: RevenueBase Database · checked Sep 16, 2026
11	Solarsmart Energy LTD	Indirect evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	26 contacts →
	Indirect evidence “SolarSmart enables Irish homeowners, farmers and business owners to generate and harness their own electricity supply from sunlight.” Source: RevenueBase Database · checked Sep 16, 2026
12	Urbanvolt	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	11-50	23 contacts →
	Partial evidence “UrbanVolt is a global leader in financing decarbonised solutions for businesses, helping companies achieve their sustainability goals through innovative energy solutions.” Source: RevenueBase Database · checked Sep 16, 2026
13	DP Energy Group	Indirect evidence	Buttevant, IrelandHQ checked Sep 16, 2026	11-50	22 contacts →
	Indirect evidence “Head quartered in Buttevant, Co.” Source: RevenueBase Database · checked Sep 16, 2026
14	Bord NA Móna	Indirect evidence	Newbridge, IrelandHQ checked Sep 16, 2026	1,001-5,000	22 contacts →
	Indirect evidence “Bord na Móna is a vibrant Irish business based in the Midlands but recognised globally.” Source: RevenueBase Database · checked Sep 16, 2026
15	Sunbird	Indirect evidence	Cork, IrelandHQ checked Sep 16, 2026	11-50	17 contacts →
	Indirect evidence “Sunbird is a Pan-European and UK solar PV developer led by an experienced team of Commercial and Industrial (C&I) specialists with decades of experience in developing, financing…” Source: RevenueBase Database · checked Sep 16, 2026
16	Terra Solar	Indirect evidence	Belfield, IrelandHQ checked Sep 16, 2026	11-50	15 contacts →
	Indirect evidence “Developing utility scale solar sites in Ireland.” Source: RevenueBase Database · checked Sep 16, 2026
17	Forgent PLC	Partial evidence	Mahon, IrelandHQ checked Sep 16, 2026	11-50	15 contacts →
	Partial evidence “Forgent plc is a technology-led energy transition company with a platform spanning clean energy generation, critical minerals and sustainable infrastructure development The…” Source: RevenueBase Database · checked Sep 16, 2026
18	Greensource LTD	Strong evidence	Limerick, IrelandHQ checked Sep 16, 2026	11-50	13 contacts →
	Strong evidence “Greensource is an Irish renewable energy group that focuses on sustainable power generation.” Source: RevenueBase Database · checked Sep 16, 2026
19	Midsummer Ireland	Strong evidence	Dublin, IrelandHQ checked Sep 16, 2026	1-10	13 contacts →
	Strong evidence “Midsummer Ireland is a leading distributor of renewable energy systems and products in Ireland and Northern Ireland, and provider of cutting-edge solar design software.” Source: RevenueBase Database · checked Sep 16, 2026
20	Copper Coast Renewables	Strong evidence	Waterford, IrelandHQ checked Sep 16, 2026	1-10	12 contacts →
	Strong evidence “We are your Energy Saving Net-Zero Partner At Copper Coast Renewables, we offer world class energy savings to your business through innovative green technologies such as Solar PV…” Source: RevenueBase Database · checked Sep 16, 2026
21	Solar Generation	Strong evidence	Sligo, IrelandHQ checked Sep 16, 2026	11-50	12 contacts →
	Strong evidence “Our team has over 25 years experience in all aspects of renewable energy with a specific focus on solar photovoltaic installations for home and business.” Source: RevenueBase Database · checked Sep 16, 2026
22	Highfield Energy Services Limited	Strong evidence	Kilgobbin Road, IrelandHQ checked Sep 16, 2026	1-10	11 contacts →
	Strong evidence “Highfield Energy develop electricity generation projects with a particular focus on renewables.” Source: RevenueBase Database · checked Sep 16, 2026
23	Harmony Solar	Indirect evidence	Dún Laoghaire, IrelandHQ checked Sep 16, 2026	1-10	10 contacts →
	Indirect evidence “An Irish-owned company that is acquiring rights for the development of solar farms” Source: RevenueBase Database · checked Sep 16, 2026
24	Rengen Power	Strong evidence	Ennis, IrelandHQ checked Sep 16, 2026	11-50	10 contacts →
	Strong evidence “Rengen Power is passionate about providing non-polluting renewable energy for a more sustainable future.” Source: RevenueBase Database · checked Sep 16, 2026
25	Circal	Partial evidence	Dublin, IrelandHQ checked Sep 16, 2026	1-10	10 contacts →
	Partial evidence “Circal is a developer of solar and energy storage projects in Ireland and the US.” 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: renewable energy startups. 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 renewable energy startups.
Partial evidence: Its own public description names part of renewable energy startups, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name renewable energy startups. 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 114 renewable energy startups based in Ireland

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Renewable energy startups based in Ireland at a glance

As of Sep 16, 2026

27.1%Verified-email coverage

24.7Average contacts per company

11-50Median size (employees)

19.3%Largest-city concentration · Dublin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 114 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 renewable energy startups, 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 “renewable energy startups”. 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 renewable energy startups), 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 renewable energy startups, 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, 763 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 renewable energy startups, 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 renewable energy startups are there based in Ireland?

RevenueBase identified 114 renewable energy startups 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?

SSE Airtricity, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most renewable energy startups?

Dublin leads with 22 headquartered companies, followed by Cork (8) 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 763 verified decision-maker contacts tracked across these 114 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.

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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 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.