Company lists · Data refreshed September 2026

Top 25 Computer services companies based in Ireland

Name: Computer services companies based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 110 companies tracked

RevenueBase identified 110 computer services companies headquartered in Ireland as of September 2026 and tracks 605 professional contacts across them, including 227 with verified work emails. Dublin is the largest hub.

This list covers computer services 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 19, 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 19, 2026 86% judged on-target in blind review

110Companies

605Contacts tracked

227Verified emails

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

The 25 largest computer services companies based in Ireland

Ranked by team size

Top 25 of 110 computer services companies based in Ireland, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to computer services 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	Zettabytes Gold Microsoft Partner	Indirect evidence	Swords, IrelandHQ checked Sep 19, 2026	11-50	42 contacts →
	Indirect evidence “Zettabytes IT Support was founded in 1986 by Declan Branagan delivering a range of It Services for nearly 40 years.” Source: RevenueBase Database · checked Sep 19, 2026
2	Trojan IT	Indirect evidence	Boyle, IrelandHQ checked Sep 19, 2026	11-50	33 contacts →
	Indirect evidence “Based in Boyle, Co.” Source: RevenueBase Database · checked Sep 19, 2026
3	Business IT Solutions	Indirect evidence	Kilkenny, IrelandHQ checked Sep 19, 2026	11-50	31 contacts →
	Indirect evidence “BITS (BUSINESS I.T.” Source: RevenueBase Database · checked Sep 19, 2026
4	Bytek IT Solutions	Indirect evidence	Glasnevin, IrelandHQ checked Sep 19, 2026	11-50	30 contacts →
	Indirect evidence “Power your business with hassle-free solutions.” Source: RevenueBase Database · checked Sep 19, 2026
5	Automate Technology	Indirect evidence	Dublin 2, IrelandHQ checked Sep 19, 2026	11-50	20 contacts →
	Indirect evidence “Automate Technology delivers a range of professional IT support, sales and consultancy services to SMEs, institutions and charities throughout Ireland with offices in both Dublin…” Source: RevenueBase Database · checked Sep 19, 2026
6	NIS LTD	Indirect evidence	Tullamore, IrelandHQ checked Sep 19, 2026	11-50	19 contacts →
	Indirect evidence “NIS Ltd provides reliable, practical IT support for schools, public sector bodies, and small to mid-sized businesses across Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
7	DEITG	Indirect evidence	Cork, IrelandHQ checked Sep 19, 2026	1-10	16 contacts →
	Indirect evidence “We are I.T.” Source: RevenueBase Database · checked Sep 19, 2026
8	A To Z Computers	Strong evidence	Kilkenny, IrelandHQ checked Sep 19, 2026	1-10	15 contacts →
	Strong evidence “At A to Z Computers Ireland, we help SMEs eliminate IT headaches, strengthen cybersecurity, and build reliable, future-ready technology environments.” Source: RevenueBase Database · checked Sep 19, 2026
9	IT Systems LTD	Indirect evidence	Killaloe, IrelandHQ checked Sep 19, 2026	11-50	14 contacts →
	Indirect evidence “At IT Systems, we provide IT Support, Network Management and IT Maintenance every day to organisations just like yours.” Source: RevenueBase Database · checked Sep 19, 2026
10	ERS IT Solutions	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	13 contacts →
	Indirect evidence “Established in 1985, ERS IT Solutions has provided IT support and services to a broad range of organisations (large and small) throughout Ireland and has evolved into one of the…” Source: RevenueBase Database · checked Sep 19, 2026
11	Radium Technologies	Indirect evidence	Dublin 18, IrelandHQ checked Sep 19, 2026	1-10	13 contacts →
	Indirect evidence “Radium is based in Dublin, Ireland, and delivers a range of professional IT services to suit all business needs including IT Consulting, Technical Support Helpdesk, Managed IT…” Source: RevenueBase Database · checked Sep 19, 2026
12	Really Good Business	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	1-10	12 contacts →
	Indirect evidence “Really Good Business provides IT Services and Solutions to small and medium size businesses who lack a dedicated IT department.” Source: RevenueBase Database · checked Sep 19, 2026
13	Techsure LTD	Strong evidence	Dublin 11, IrelandHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “As a computer services company Techsure offers a wide range of options, which will ensure that your IT issues are addressed quickly and competently.” Source: RevenueBase Database · checked Sep 19, 2026
14	1network	Indirect evidence	Dublin, IrelandHQ checked Sep 19, 2026	11-50	11 contacts →
	Indirect evidence “1network is one of Dublin's leading IT support and consulting services since 2002, we provide solutions to all of our client’s IT needs, from purchasing hardware and software to…” Source: RevenueBase Database · checked Sep 19, 2026
15	Inet Computer Solutions	Strong evidence	Mullingar, IrelandHQ checked Sep 19, 2026	11-50	11 contacts →
	Strong evidence “INET Computer Solutions PC Support was formed in 2004 by Ronan Mc Namara with the aim of providing in house Technical Support for small businesses which had neither the skills nor…” Source: RevenueBase Database · checked Sep 19, 2026
16	PC Peripherals	Indirect evidence	Dublin 18, IrelandHQ checked Sep 19, 2026	11-50	10 contacts →
	Indirect evidence “PC Peripherals was founded in May 1992 and is a wholly Irish owned and managed company.” Source: RevenueBase Database · checked Sep 19, 2026
17	GPS IT Services LTD	Indirect evidence	Celbridge, IrelandHQ checked Sep 19, 2026	11-50	9 contacts →
	Indirect evidence “Imagine an IT partnership that transcends conventional service providers – one that prioritizes your business growth over short-term gains.” Source: RevenueBase Database · checked Sep 19, 2026
18	Irish Computers	Strong evidence	Nenagh, IrelandHQ checked Sep 19, 2026	11-50	7 contacts →
	Strong evidence “Irish Computers is a trusted Irish IT services provider supporting businesses and educational institutions with reliable, proactive technology solutions that reduce complexity…” Source: RevenueBase Database · checked Sep 19, 2026
19	Echo IT LTD	Indirect evidence	Nenagh, IrelandHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “EchoIT are a professional IT services company.” Source: RevenueBase Database · checked Sep 19, 2026
20	Computer Technical Services	Indirect evidence	Dublin 24, IrelandHQ checked Sep 19, 2026	11-50	7 contacts →
	Indirect evidence “Based in Dublin, Ireland, we’ve specialised in providing comprehensive support, maintenance and networking for small to large companies since 1992.” Source: RevenueBase Database · checked Sep 19, 2026
21	GDK Network Systems	Indirect evidence	Dublin 14, IrelandHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “Since 1998, GDK Network Systems have specialized in the delivery of IT Technology solutions to Businesses and to the Education sector in Ireland.” Source: RevenueBase Database · checked Sep 19, 2026
22	Arona IT Solutions	Indirect evidence	Kilcullen, IrelandHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “Arona has been offering IT support for business for over a decade.” Source: RevenueBase Database · checked Sep 19, 2026
23	Avova Technologies	Indirect evidence	Athlone, IrelandHQ checked Sep 19, 2026	11-50	6 contacts →
	Indirect evidence “Avova Technologies is an innovative I.T.” Source: RevenueBase Database · checked Sep 19, 2026
24	Squarebreed	Indirect evidence	Dublin 10, IrelandHQ checked Sep 19, 2026	1-10	6 contacts →
	Indirect evidence “We are a full-fledged IT Services, Consultancy, Software, web application, Mobile app development company.” Source: RevenueBase Database · checked Sep 19, 2026
25	Fitzpatrick Business Systems	Indirect evidence	Limerick, IrelandHQ checked Sep 19, 2026	11-50	5 contacts →
	Indirect evidence “FITZPATRICK Business Systems is one of the top IT services companies in Ireland, providing ICT solutions to a growing client base across the leading business sectors in an ever…” Source: RevenueBase Database · checked Sep 19, 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: computer services 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 computer services companies.
Partial evidence: Its own public description names part of computer services companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name computer services 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 110 computer services companies based in Ireland

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 227 reachable decision-makers.

Free signup · no credit card

View the full list →

Computer services companies based in Ireland at a glance

As of Sep 19, 2026

37.5%Verified-email coverage

5.5Average contacts per company

1-10Median size (employees)

16.4%Largest-city concentration · Dublin

Sep 19, 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 110 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 computer services 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 “computer services 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 computer services 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 computer services 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, 227 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 19, 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 computer services 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 computer services companies are there based in Ireland?

RevenueBase identified 110 computer services 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?

Zettabytes Gold Microsoft Partner, headquartered in Swords Co Dublin, tops this list with the largest team on record.

Which city has the most computer services companies?

Dublin leads with 18 headquartered companies, followed by Cork (4) and Dundalk (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 227 verified decision-maker contacts tracked across these 110 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 19, 2026.

Ready to reach these companies? Verified emails and direct dials for all 110 computer services companies based in Ireland. Start with a free account, no credit card.

Download this list →

Related lists

Computer services companies by geography

Browse the directory

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.