Company lists · Data refreshed September 2026

Top 25 IT systems integrators based in Ireland

Name: IT systems integrators based in Ireland
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 59 companies tracked

RevenueBase identified 59 IT systems integrators headquartered in Ireland as of September 2026 and tracks 1,198 professional contacts across them, including 599 with verified work emails. Dublin is the largest hub.

This list covers IT systems integrators 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 28, 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 28, 2026 86% judged on-target in blind review

59Companies

1,198Contacts tracked

599Verified emails

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The 25 largest IT systems integrators based in Ireland

Ranked by team size

Top 25 of 59 IT systems integrators based in Ireland, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to IT systems integrators: 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 28, 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 28, 2026
2	Presidio Europe & Asia Pacific	Indirect evidence	Dublin, IrelandHQ checked Sep 28, 2026	201-500	102 contacts →
	Indirect evidence “Welcome to the official EMEA & APAC page for Presidio.” Source: RevenueBase Database · checked Sep 28, 2026
3	SL Controls LTD	Partial evidence	Sligo, IrelandHQ checked Sep 28, 2026	51-200	91 contacts →
	Partial evidence “Established in 2002, SL Controls has evolved into an industry-leading provider of Systems Integration solutions.” Source: RevenueBase Database · checked Sep 28, 2026
4	Modular Automation	Indirect evidence	Shannon, IrelandHQ checked Sep 28, 2026	51-200	81 contacts →
	Indirect evidence “We enable the world’s leading medtech companies manufacture sophisticated, ultra-high quality, life-changing products, at scale.” Source: RevenueBase Database · checked Sep 28, 2026
5	HCS	Indirect evidence	Dublin 24, IrelandHQ checked Sep 28, 2026	51-200	63 contacts →
	Indirect evidence “The technology landscape may be changing every day, but with a team of internationally accredited experts right here in Ireland, HCS can navigate your organisation across its…” Source: RevenueBase Database · checked Sep 28, 2026
6	Intuity Technologies	Partial evidence	Galway, IrelandHQ checked Sep 28, 2026	51-200	51 contacts →
	Partial evidence “Intuity Technologies is an Irish technology company specialising in Data, AI, IT and Cybersecurity, headquartered in Galway.” Source: RevenueBase Database · checked Sep 28, 2026
7	Sygma Automation	Indirect evidence	Mallow Road, IrelandHQ checked Sep 28, 2026	11-50	35 contacts →
	Indirect evidence “Senior engineers located in the following areas: Cork - Dublin - Belfast - Galway - Mayo - Donegal - Roscommon - Longford - Kerry - Laois - Limerick Sygma Automation specialises…” Source: RevenueBase Database · checked Sep 28, 2026
8	MJ Flood Technology	Indirect evidence	Dublin, IrelandHQ checked Sep 28, 2026	51-200	31 contacts →
	Indirect evidence “At MJ Flood Technology, we specialise in connectivity – connecting people, processes and technology to help organisations capitalise on the disruptive, digitised world we live in.” Source: RevenueBase Database · checked Sep 28, 2026
9	Visionid, A Peak Technologies' Company	Indirect evidence	Clonmel, IrelandHQ checked Sep 28, 2026	11-50	30 contacts →
	Indirect evidence “In 2022 VisionID became part of the wider Peak Technologies European Group.” Source: RevenueBase Database · checked Sep 28, 2026
10	DNA IT Solutions	Partial evidence	Dublin, IrelandHQ checked Sep 28, 2026	11-50	26 contacts →
	Partial evidence “DNA IT Solutions provide effective technologies for business success.” Source: RevenueBase Database · checked Sep 28, 2026
11	Control And Information Management CIM LTD	Strong evidence	IrelandHQ checked Sep 28, 2026	51-200	20 contacts →
	Strong evidence “Control and Information Management (CIM) Ltd is one of the leading system integrators in the area of industrial automation in Ireland.” Source: RevenueBase Database · checked Sep 28, 2026
12	Eastpoint Solutions	Indirect evidence	Dublin, IrelandHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “EastPoint Solutions was founded in April 2009 by Mike O’Brien.” Source: RevenueBase Database · checked Sep 28, 2026
13	INS	Strong evidence	Dublin, IrelandHQ checked Sep 28, 2026	1-10	11 contacts →
	Strong evidence “INS - International Network Systems Limited was formed in 1993 to provide IT skills and solutions to an exploding market in both Ireland and the UK.” Source: RevenueBase Database · checked Sep 28, 2026
14	Inet Computer Solutions	Indirect evidence	Mullingar, IrelandHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect 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 28, 2026
15	GPS IT Services LTD	Partial evidence	Celbridge, IrelandHQ checked Sep 28, 2026	11-50	9 contacts →
	Partial 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 28, 2026
16	Dovetail Technologies LTD	Partial evidence	Dublin, IrelandHQ checked Sep 28, 2026	11-50	7 contacts →
	Partial evidence “Dovetail is a specialist provider of custom IT solutions.” Source: RevenueBase Database · checked Sep 28, 2026
17	Tusa IT	Partial evidence	Ballycoolen, IrelandHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “TUSA IT helps your business to leverage IT Solutions to keep you secure and drive your business goals.” Source: RevenueBase Database · checked Sep 28, 2026
18	NOVI	Partial evidence	Naas, IrelandHQ checked Sep 28, 2026	11-50	5 contacts →
	Partial evidence “Novi delivers security-oriented IT services that reduce risk and enable growth.” Source: RevenueBase Database · checked Sep 28, 2026
19	Capstone Intelligent Solutions Limited	Indirect evidence	IrelandHQ checked Sep 28, 2026	51-200	4 contacts →
	Indirect evidence “Capstone is a company that connects your people with each other and with your clients.” Source: RevenueBase Database · checked Sep 28, 2026
20	Etelligence LTD	Partial evidence	Togher, IrelandHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial evidence “Etelligence is an IT company dedicated to you, the Small to Medium sized Enterprise (SME).” Source: RevenueBase Database · checked Sep 28, 2026
21	Agile Networks LTD	Indirect evidence	Saggart, IrelandHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “Who Are Agile Networks?” Source: RevenueBase Database · checked Sep 28, 2026
22	Logicon Automation Solutions	Partial evidence	Dundalk, IrelandHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Logicon provide development and installation of PLC, HMI and Scada systems and also provide project management, procurement, commissioning and validation services.” Source: RevenueBase Database · checked Sep 28, 2026
23	Hereworks	Indirect evidence	IrelandHQ checked Sep 28, 2026	51-200	2 contacts →
	Indirect evidence “Hereworks - creating community from technology There’s a perception that technology is scary, a dark art, an esoteric area of knowledge that ‘normal people’ can’t understand.” Source: RevenueBase Database · checked Sep 28, 2026
24	3tek	Partial evidence	Wexford, IrelandHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “3Tek are a dynamic team of IT solution providers based in Wexford.” Source: RevenueBase Database · checked Sep 28, 2026
25	1cluster	Indirect evidence	Dublin, IrelandHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “1Cluster is a technology partner for SMEs that want secure, resilient digital foundations without unnecessary complexity.” Source: RevenueBase Database · checked Sep 28, 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 systems integrators. 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 systems integrators.
Partial evidence: Its own public description names part of IT systems integrators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name IT systems integrators. 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 59 IT systems integrators based in Ireland

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IT systems integrators based in Ireland at a glance

As of Sep 28, 2026

50.0%Verified-email coverage

20.3Average contacts per company

11-50Median size (employees)

35.6%Largest-city concentration · Dublin

Sep 28, 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 59 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 systems integrators, 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 systems integrators”. 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 systems integrators), 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 systems integrators, 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, 599 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 28, 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 IT systems integrators, 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 systems integrators are there based in Ireland?

RevenueBase identified 59 IT systems integrators 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 systems integrators?

Dublin leads with 21 headquartered companies, followed by Cork (3) and Galway (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 599 verified decision-maker contacts tracked across these 59 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 28, 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.