Company lists · Data refreshed September 2026

Top 25 IT infrastructure support services based in Ireland

Name: IT infrastructure support services based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 132 companies tracked

RevenueBase identified 132 IT infrastructure support services headquartered in Ireland as of September 2026 and tracks 1,317 professional contacts across them, including 518 with verified work emails. Dublin is the largest hub.

This list covers IT infrastructure support services 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 21, 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 21, 2026 86% judged on-target in blind review

132Companies

1,317Contacts tracked

518Verified emails

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The 25 largest IT infrastructure support services based in Ireland

Ranked by team size

Top 25 of 132 IT infrastructure support services based in Ireland, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to IT infrastructure support services: 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	ATC Part Of Arvato	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	201-500	189 contacts →
	Partial evidence “ATC part of Arvato, is a trusted partner in sustainable specialised transport, logistics, and technical services for the digital infrastructure sector.” Source: RevenueBase Database · checked Sep 21, 2026
2	Innovate	Partial evidence	Dublin 18, IrelandHQ checked Sep 21, 2026	11-50	58 contacts →
	Partial evidence “INNOVATE - The IT Solutions People INNOVATE provide Managed IT Services and Professional IT Services across \| Networking \| Security \| Communications \| Cloud Productivity \| Cloud…” Source: RevenueBase Database · checked Sep 21, 2026
3	Vision Business Technology VBT	Partial evidence	Kilmacanogue, IrelandHQ checked Sep 21, 2026	51-200	55 contacts →
	Partial evidence “At VBT IT Solutions, we help businesses leverage technology to operate more securely, efficiently, and productively.” Source: RevenueBase Database · checked Sep 21, 2026
4	Zettabytes Gold Microsoft Partner	Strong evidence	Swords, IrelandHQ checked Sep 21, 2026	11-50	42 contacts →
	Strong 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 21, 2026
5	Tomorrows World TW	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	51-200	36 contacts →
	Partial evidence “Tomorrows World Limited (TW) was founded in 1979 and is one of the longest established IT services companies in Ireland.” Source: RevenueBase Database · checked Sep 21, 2026
6	Unitec IT Solutions	Indirect evidence	Clonmel, IrelandHQ checked Sep 21, 2026	11-50	35 contacts →
	Indirect evidence “Unitec are an international technology company with offices in both Ireland and South Africa.” Source: RevenueBase Database · checked Sep 21, 2026
7	Bytek IT Solutions	Indirect evidence	Glasnevin, IrelandHQ checked Sep 21, 2026	11-50	30 contacts →
	Indirect evidence “Power your business with hassle-free solutions.” Source: RevenueBase Database · checked Sep 21, 2026
8	Paradyn	Partial evidence	Sandyford, IrelandHQ checked Sep 21, 2026	51-200	27 contacts →
	Partial evidence “Paradyn is a leading provider of IT security and consultancy services in Ireland, offering a comprehensive, best-in-class suite of security services to monitor, protect and defend…” Source: RevenueBase Database · checked Sep 21, 2026
9	DNA IT Solutions	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	26 contacts →
	Partial evidence “DNA IT Solutions provide effective technologies for business success.” Source: RevenueBase Database · checked Sep 21, 2026
10	Landmark Technologies	Indirect evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	11-50	26 contacts →
	Indirect evidence “At Landmark Technologies our proactive services are designed to provide small to medium enterprises with the kind of diagnostic approach usually only available to large…” Source: RevenueBase Database · checked Sep 21, 2026
11	Automate Technology	Strong evidence	Dublin 2, IrelandHQ checked Sep 21, 2026	11-50	20 contacts →
	Strong 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 21, 2026
12	Lantech	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	19 contacts →
	Strong evidence “Founded in 2007, We at Lantech deliver bespoke IT Services from concept to delivery to support for our clients based in Ireland, UK and Europe.” Source: RevenueBase Database · checked Sep 21, 2026
13	NIS LTD	Strong evidence	Tullamore, IrelandHQ checked Sep 21, 2026	11-50	19 contacts →
	Strong 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 21, 2026
14	DEITG	Indirect evidence	Cork, IrelandHQ checked Sep 21, 2026	1-10	16 contacts →
	Indirect evidence “We are I.T.” Source: RevenueBase Database · checked Sep 21, 2026
15	A To Z Computers	Partial evidence	Kilkenny, IrelandHQ checked Sep 21, 2026	1-10	15 contacts →
	Partial 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 21, 2026
16	IT Systems LTD	Strong evidence	Killaloe, IrelandHQ checked Sep 21, 2026	11-50	14 contacts →
	Strong 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 21, 2026
17	Abacus Systems & Networks LTD	Partial evidence	Walkinstown, IrelandHQ checked Sep 21, 2026	1-10	14 contacts →
	Partial evidence “Abacus Systems provides IT solutions to SMEs, Corporates and Government agencies.” Source: RevenueBase Database · checked Sep 21, 2026
18	Enclave	Strong evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	11-50	14 contacts →
	Strong evidence “Managed IT Services Enclave’s Managed IT service for small to medium sized businesses lowers the cost of supporting IT systems, delivered at a fixed price with no hidden expenses…” Source: RevenueBase Database · checked Sep 21, 2026
19	Iping IT Services	Indirect evidence	Dublin 2, IrelandHQ checked Sep 21, 2026	1-10	14 contacts →
	Indirect evidence “Some of iPing's services - Tel: 01 524 1350 Managed Services The implementation of managed services in your network is an important piece in your overall network design.” Source: RevenueBase Database · checked Sep 21, 2026
20	ERS IT Solutions	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	13 contacts →
	Strong 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 21, 2026
21	Radium Technologies	Strong evidence	Dublin 18, IrelandHQ checked Sep 21, 2026	1-10	13 contacts →
	Strong 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 21, 2026
22	Really Good Business	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	1-10	12 contacts →
	Partial 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 21, 2026
23	CK Computer Solutions	Partial evidence	Dublin 8, IrelandHQ checked Sep 21, 2026	1-10	12 contacts →
	Partial evidence “Welcome to CK Computer Solutions CK Computer Solutions offers an honest, competitive and comprehensive IT service for Small to Medium sized businesses.” Source: RevenueBase Database · checked Sep 21, 2026
24	Techsure LTD	Partial evidence	Dublin 11, IrelandHQ checked Sep 21, 2026	11-50	11 contacts →
	Partial 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 21, 2026
25	Stryve Secure - The Cyber	Strong evidence	Galway, IrelandHQ checked Sep 21, 2026	201-500	11 contacts →
	Strong evidence “Sleepless provides security-first IT-managed services to support your operations, secure your data and enable digital transformation to empower your business.” Source: RevenueBase Database · checked Sep 21, 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: IT infrastructure support services. 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 IT infrastructure support services.
Partial evidence: Its own public description names part of IT infrastructure support services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT infrastructure support services. 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 132 IT infrastructure support services based in Ireland

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IT infrastructure support services based in Ireland at a glance

As of Sep 21, 2026

39.3%Verified-email coverage

10.0Average contacts per company

1-10Median size (employees)

25.8%Largest-city concentration · Dublin

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 132 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 IT infrastructure support services, 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 “IT infrastructure support services”. 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 IT infrastructure support services), 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 IT infrastructure support services, 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, 518 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 21, 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.

IT infrastructure support services by metro

IT infrastructure support services in Dublin34

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 IT infrastructure support services, 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 IT infrastructure support services are there based in Ireland?

RevenueBase identified 132 IT infrastructure support services 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?

ATC Part Of Arvato, headquartered in Ireland, tops this list with the largest team on record.

Which city has the most IT infrastructure support services?

Dublin leads with 34 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 518 verified decision-maker contacts tracked across these 132 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 21, 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.