Company lists · Data refreshed September 2026

Top 25 IT support outsourcing companies based in Ireland

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 107 companies tracked

RevenueBase identified 107 IT support outsourcing companies headquartered in Ireland as of September 2026 and tracks 1,157 professional contacts across them, including 472 with verified work emails. Dublin is the largest hub.

This list covers IT support outsourcing 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 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

107Companies

1,157Contacts tracked

472Verified emails

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The 25 largest IT support outsourcing companies based in Ireland

Ranked by team size

Top 25 of 107 IT support outsourcing companies 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 support outsourcing 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	Nostra	Partial evidence	Dublin 12, IrelandHQ checked Sep 21, 2026	201-500	288 contacts →
	Partial evidence “Nostra was established in 2006 and in that time has become one of Ireland’s most trusted providers of Managed IT and Cyber Security Services for a wide range of sectors.” Source: RevenueBase Database · checked Sep 21, 2026
2	Renditiondigital International LTD	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	201-500	149 contacts →
	Partial evidence “RenditionDigital International Ltd, is an offshore outsourcing company providing superior-quality, cost-effective services for Software Engineering, Digital Publishing, BPO and…” Source: RevenueBase Database · checked Sep 21, 2026
3	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
4	Business IT Solutions	Indirect evidence	Kilkenny, IrelandHQ checked Sep 21, 2026	11-50	31 contacts →
	Indirect evidence “BITS (BUSINESS I.T.” Source: RevenueBase Database · checked Sep 21, 2026
5	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
6	Enterprise Solutions	Partial evidence	Dublin 18, IrelandHQ checked Sep 21, 2026	11-50	21 contacts →
	Partial evidence “Enterprise Solutions is a trusted provider of IT Solutions and Managed Services.” Source: RevenueBase Database · checked Sep 21, 2026
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	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
17	1network	Strong evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	11 contacts →
	Strong 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 21, 2026
18	Inet Computer Solutions	Partial evidence	Mullingar, IrelandHQ checked Sep 21, 2026	11-50	11 contacts →
	Partial 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 21, 2026
19	Partners In Logistics	Partial evidence	Shannon, IrelandHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “We are specialists in the supply of customised outsourcing solutions, which enable our clients to improve the efficiency and cost effectiveness of their organisations.” Source: RevenueBase Database · checked Sep 21, 2026
20	Definitive	Partial evidence	Swords, IrelandHQ checked Sep 21, 2026	11-50	9 contacts →
	Partial evidence “Definitive Solutions Limited was established in to provide a comprehensive outsourced IT Managed Services nationwide (specialising in security) tailored to our clients’ specific…” Source: RevenueBase Database · checked Sep 21, 2026
21	The IT Department - Wexford	Strong evidence	Wexford, IrelandHQ checked Sep 21, 2026	1-10	8 contacts →
	Strong evidence “The IT Department works with companies that need the support of an IT department without having the overheads of a dedicated in-house IT professional.” Source: RevenueBase Database · checked Sep 21, 2026
22	Everything IT	Partial evidence	Dublin, IrelandHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “Innovating IT Services & Solutions \| Everything IT Founded in 2010, Everything IT has grown into a leading provider of managed IT services and solutions, passionately serving over…” Source: RevenueBase Database · checked Sep 21, 2026
23	Irish Computers	Strong evidence	Nenagh, IrelandHQ checked Sep 21, 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 21, 2026
24	Echo IT LTD	Partial evidence	Nenagh, IrelandHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial evidence “EchoIT are a professional IT services company.” Source: RevenueBase Database · checked Sep 21, 2026
25	Computer Technical Services	Partial evidence	Dublin 24, IrelandHQ checked Sep 21, 2026	11-50	7 contacts →
	Partial 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 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 support outsourcing 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 IT support outsourcing companies.
Partial evidence: Its own public description names part of IT support outsourcing companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT support outsourcing 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 107 IT support outsourcing companies based in Ireland

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IT support outsourcing companies based in Ireland at a glance

As of Sep 21, 2026

40.8%Verified-email coverage

10.8Average contacts per company

1-10Median size (employees)

28.0%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 107 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 support outsourcing 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 “IT support outsourcing 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 IT support outsourcing 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 IT support outsourcing 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, 472 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 support outsourcing companies by metro

IT support outsourcing companies in Dublin30

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 support outsourcing 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 IT support outsourcing companies are there based in Ireland?

RevenueBase identified 107 IT support outsourcing 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?

Nostra, headquartered in Dublin, tops this list with the largest team on record.

Which city has the most IT support outsourcing companies?

Dublin leads with 30 headquartered companies, followed by Cork (4) and Dun Laoghaire (2).

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 472 verified decision-maker contacts tracked across these 107 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.